| Common Name | Scientific Name | Code |
|---|
| n/a | Actaea ?ludovici Boivin [pachypoda ? rubra] | ACLU |
| n/a | Actaea arizonica (S. Wats.) J. Compton | ACAR18 |
| n/a | Actaea racemosa L. var. dissecta (Gray) J. Compton | ACRAD |
| n/a | Caltha novae-zelandiae Hook. f. [excluded] | CANO8 |
| n/a | Caltha obtusa Cheeseman [excluded] | CAOB16 |
| n/a | Clematis ?jackmanii T. Moore [lanuginosa ? viticella] | CLJA2 |
| n/a | Clematis apiifolia DC. | CLAP3 |
| n/a | Clematis armandii Franch. | CLAR7 |
| n/a | Clematis campaniflora Brot. [excluded] | CLCA17 |
| n/a | Clematis cirrhosa L. | CLCI2 |
| n/a | Clematis fusca Turcz. | CLFU4 |
| n/a | Clematis henryi Oliv. | CLHE6 |
| n/a | Clematis hirsuta Guill. & Perr. | CLHI5 |
| n/a | Clematis integrifolia L. | CLIN6 |
| n/a | Clematis koreana Kom. | CLKO3 |
| n/a | Clematis macropetala Ledeb. | CLMA21 |
| n/a | Clematis microphylla DC. var. leptophylla F. Muell. ex Benth. | CLMIL2 |
| n/a | Clematis montana Buch.-Ham. ex DC. | CLMO10 |
| n/a | Clematis songarica Bunge | CLSO6 |
| n/a | Clematis tangutica (Maxim.) Korsh. | CLTA2 |
| n/a | Clematis terniflora DC. var. mandshurica (Rupr.) Ohwi | CLTEM |
| n/a | Clematis welwitschii Hiern ex Kuntze | CLWE2 |
| n/a | Delphinium ?burkei Greene (pro sp.) [depauperatum ? nuttallianum] | DEBU |
| n/a | Delphinium ?confertiflorum Woot. (pro sp.) [scaposum ? wootonii] | DECO3 |
| n/a | Delphinium ?diversicolor Rydb. [distichum ? nuttallianum] | DEDI3 |
| n/a | Delphinium ?inflexum A. Davids. (pro sp.) [cardinale ? parryi] | DEIN7 |
| n/a | Delphinium ?nutans A. Nels. (pro sp.) [brachycentrum ? glaucum] | DENU7 |
| n/a | Delphinium ?occidentale (S. Wats.) S. Wats. (pro sp.) [barbeyi ? glaucum] | DEOC |
| n/a | Delphinium formosum Boiss. & A. Huet. [excluded] | DEFO4 |
| n/a | Delphinium laxiflorum DC. | DELA9 |
| n/a | Ranunculus aconitifolius L. | RAAC5 |
| n/a | Ranunculus acris L. ssp. friesianus (Jord.) Rouy & Foucaud | RAACF2 |
| n/a | Ranunculus cordiger Viviani [excluded] | RACO20 |
| n/a | Ranunculus gramineus L. | RAGR4 |
| n/a | Ranunculus harveyi (Gray) Britt. var. australis (Brand) L. Benson [excluded] | RAHAA |
| n/a | Ranunculus hydrocharoides Gray var. natans (N?es ex G. Don) L. Benson [excluded] | RAHYN |
| n/a | Ranunculus natans C.A. Mey. [excluded] | RANA2 |
| n/a | Thalictrum minus L. | THMI15 |
| n/a | Thalictrum minus L. ssp. minus | THMIM |
| n/a | Thalictrum occidentale Gray var. macounii Boivin | THOCM4 |
| n/a | Thalictrum squarrosum Stephan ex Willd. | THSQ |
| Aconitum columbianum ssp. columbianum | Aconitum columbianum Nutt. ssp. pallidum Piper | ACCOP |
| Aconitum columbianum ssp. columbianum | Aconitum columbianum Nutt. var. bakeri (Greene) Harrington | ACCOB |
| Aconitum columbianum ssp. columbianum | Aconitum columbianum Nutt. var. ochroleucum A. Nels. | ACCOO |
| Aconitum columbianum ssp. columbianum | Aconitum geranioides Greene | ACGE3 |
| Aconitum columbianum ssp. columbianum | Aconitum leibergii Greene | ACLE6 |
| Aconitum columbianum ssp. columbianum | Aconitum mogollonicum Greene | ACMO3 |
| Aconitum columbianum ssp. viviparum | Aconitum bulbiferum T.J. Howell | ACBU |
| Aconitum columbianum ssp. viviparum | Aconitum columbianum Nutt. var. howellii (A. Nels. & J.F. Macbr.) C.L. Hitchc. | ACCOH |
| Aconitum columbianum ssp. viviparum | Aconitum hansenii Greene | ACHA2 |
| Aconitum columbianum ssp. viviparum | Aconitum howellii A. Nels. & J.F. Macbr. | ACHO |
| Aconitum columbianum ssp. viviparum | Aconitum viviparum Greene | ACVI5 |
| Aconitum delphiniifolium ssp. delphiniifolium | Aconitum delphiniifolium DC. var. albiflorum Porsild | ACDEA |
| Aconitum delphiniifolium ssp. paradoxum | Aconitum nivatum A. Nels. | ACNI3 |
| Aconitum noveboracense | Aconitum noveboracense Gray ex Coville var. quasiciliatum Fassett | ACNOQ |
| Aconitum noveboracense | Aconitum uncinatum L. ssp. noveboracense (Gray ex Coville) Hardin | ACUNN |
| Aconitum uncinatum ssp. muticum | Aconitum uncinatum L. var. muticum DC. | ACUNM2 |
| Aconitum uncinatum ssp. uncinatum | Aconitum uncinatum L. var. acutidens Fern. | ACUNA |
| Actaea arizonica | Cimicifuga arizonica S. Wats. | CIAR |
| Actaea elata | Cimicifuga elata Nutt. | CIEL |
| Actaea laciniata | Cimicifuga laciniata S. Wats. | CILA |
| Actaea pachypoda | Actaea alba auct. non (L.) P. Mill. [misapplied] | ACAL7 |
| Actaea podocarpa | Actaea cordifolia DC. | ACCO25 |
| Actaea podocarpa | Cimicifuga americana Michx. | CIAM |
| Actaea podocarpa | Cimicifuga cordifolia (DC.) Torr. & Gray | CICO9 |
| Actaea podocarpa | Cimicifuga racemosa (L.) Nutt. var. cordifolia (DC.) Gray | CIRAC |
| Actaea racemosa var. dissecta | Cimicifuga racemosa (L.) Nutt. var. dissecta Gray | CIRAD |
| Actaea racemosa var. racemosa | Cimicifuga racemosa (L.) Nutt. | CIRA |
| Actaea rubifolia | Actaea cordifolia auct. non DC. [misapplied] | ACCO26 |
| Actaea rubifolia | Cimicifuga cordifolia auct. non (DC.) Torr. & Gray [misapplied] | CICO4 |
| Actaea rubifolia | Cimicifuga racemosa (L.) Nutt. var. cordifolia auct. non (DC.) Gray [misapplied] | CIRAC3 |
| Actaea rubifolia | Cimicifuga rubifolia Kearney | CIRU |
| Actaea rubra ssp. arguta | Actaea arguta Nutt. | ACAR7 |
| Actaea rubra ssp. arguta | Actaea arguta Nutt. var. viridiflora (Greene) Tidestrom | ACARV |
| Actaea rubra ssp. arguta | Actaea rubra (Ait.) Willd. var. arguta (Nutt.) Lawson | ACRUA |
| Actaea rubra ssp. arguta | Actaea spicata L. var. arguta (Nutt.) Torr. | ACSPA |
| Actaea rubra ssp. rubra | Actaea spicata L. ssp. rubra (Ait.) Hult | ACSPR3 |
| Addison's leather flower | Clematis addisonii Britt. | CLAD |
| Adonis aestivalis | Adonis aestivalis L. var. citrina Hoffmann | ADAEC |
| Adonis annua | Adonis autumnalis L. | ADAU |
| Adonis vernalis | Chrysocyathus vernalis (L.) Holub | CHVE13 |
| Alabama larkspur | Delphinium alabamicum Kral | DEAL2 |
| Alabama leather flower | Clematis socialis Kral | CLSO3 |
| alkali buttercup | Ranunculus cymbalaria Pursh | RACY |
| Allegheny Mountain buttercup | Ranunculus allegheniensis Britt. | RAAL2 |
| alpine buttercup | Ranunculus adoneus Gray | RAAD |
| alpine buttercup | Ranunculus adoneus Gray var. adoneus | RAADA2 |
| alpine buttercup | Ranunculus adoneus Gray var. alpinus (S. Wats.) L. Benson | RAADA |
| alpine meadow-rue | Thalictrum alpinum L. | THAL |
| American globeflower | Trollius laxus Salisb. | TRLA14 |
| American globeflower | Trollius laxus Salisb. ssp. albiflorus (Gray) A.& D. L?ve & Kapoor | TRLAA2 |
| American globeflower | Trollius laxus Salisb. ssp. laxus | TRLAL |
| Anderson's buttercup | Ranunculus andersonii Gray | RAAN |
| Anderson's buttercup | Ranunculus andersonii Gray var. andersonii | RAANA |
| Anderson's buttercup | Ranunculus andersonii Gray var. tenellus S. Wats. | RAANT |
| Anderson's larkspur | Delphinium andersonii Gray | DEAN |
| anemone | Anemone L. | ANEMO |
| Anemone berlandieri | Anemone decapetala Ard. var. heterophylla (Torr. & Gray) Britt. | ANDEH |
| Anemone berlandieri | Anemone decapetala auct. non Ard. [misapplied] | ANDE10 |
| Anemone berlandieri | Anemone heterophylla Nutt. ex Torr. & Gray (pro syn.) | ANHE5 |
| Anemone canadensis | Anemonidium canadense (L.) A.& D. L?ve | ANCA44 |
| Anemone lancifolia | Anemone quinquefolia L. var. lancifolia (Pursh) Fosberg | ANQUL |
| Anemone lancifolia | Anemone trifolia auct. non L. [misapplied] | ANTR5 |
| Anemone lithophila | Anemone drummondii S. Wats. var. lithophila (Rydb.) C.L. Hitchc. | ANDRL |
| Anemone lyallii | Anemone nemorosa L. var. lyallii (Britt.) Ulbr. | ANNEL |
| Anemone lyallii | Anemone quinquefolia L. var. lyallii (Britt.) B.L. Robins. | ANQUL2 |
| Anemone multifida var. hudsoniana | Anemone globosa (Torr. & Gray) Nutt. ex Pritz. | ANGL6 |
| Anemone multifida var. hudsoniana | Anemone hudsoniana (DC.) Richards. | ANHU3 |
| Anemone multifida var. hudsoniana | Anemone multifida Poir. var. globosa Torr. & Gray | ANMUG |
| Anemone multifida var. hudsoniana | Anemone multifida Poir. var. nowosadii Boivin | ANMUN |
| Anemone multifida var. saxicola | Anemone multifida Poir. ssp. saxicola (Boivin) W.A. Weber | ANMUS2 |
| Anemone multifida var. stylosa | Anemone quinquefolia L. var. stylosa (A. Nels.) Dutton & Keener | ANQUS |
| Anemone multifida var. stylosa | Anemone stylosa A. Nels. | ANST8 |
| Anemone narcissiflora var. monantha | Anemonastrum narcissiflorum (L.) Holub ssp. sibiricum (L.) A.& D. L?ve | ANNAS2 |
| Anemone narcissiflora var. monantha | Anemone narcissiflora L. ssp. alaskana Hult | ANNAA3 |
| Anemone narcissiflora var. monantha | Anemone narcissiflora L. ssp. interior Hult | ANNAI3 |
| Anemone narcissiflora var. monantha | Anemone narcissiflora L. ssp. sibirica (L.) Hult | ANNAS3 |
| Anemone narcissiflora var. monantha | Anemone narcissiflora L. var. alaskana (Hult?n) Boivin | ANNAA2 |
| Anemone narcissiflora var. monantha | Anemone narcissiflora L. var. interior (Hult?n) Boivin | ANNAI2 |
| Anemone narcissiflora var. villosissima | Anemonastrum narcissiflorum (L.) Holub ssp. villosissimum (DC.) A.& D. L?ve | ANNAV2 |
| Anemone narcissiflora var. villosissima | Anemone narcissiflora L. ssp. villosissima (DC.) Hult | ANNAV4 |
| Anemone narcissiflora var. zephyra | Anemonastrum narcissiflorum (L.) Holub ssp. zephyrum (A. Nels.) W.A. Weber | ANNAZ3 |
| Anemone narcissiflora var. zephyra | Anemone narcissiflora L. ssp. zephyra (A. Nels.) Hult | ANNAZ4 |
| Anemone narcissiflora var. zephyra | Anemone zephyra A. Nels. | ANZE2 |
| Anemone nemorosa | Anemonidium nemorosum (L.) Holub | ANNE5 |
| Anemone oregana var. felix | Anemone felix M.E. Peck | ANFE3 |
| Anemone oregana var. oregana | Anemone adamsiana Eastw. | ANAD2 |
| Anemone oregana var. oregana | Anemone grayi Behr & Kellogg | ANGR12 |
| Anemone oregana var. oregana | Anemone quinquefolia L. var. grayi (Behr & Kellogg) Jepson | ANQUG |
| Anemone oregana var. oregana | Anemone quinquefolia L. var. minor (Eastw.) Munz | ANQUM |
| Anemone oregana var. oregana | Anemone quinquefolia L. var. oregana (Gray) B.L. Robins. | ANQUO |
| Anemone quinquefolia var. bifolia | Anemone nemorosa L. var. bifolia (Farw.) Boivin | ANNEB |
| Anemone quinquefolia var. bifolia | Anemone quinquefolia L. var. interior Fern. | ANQUI |
| Anemone quinquefolia var. minima | Anemone minima DC. | ANMI |
| Anemone quinquefolia var. quinquefolia | Anemone nemorosa L. var. quinquefolia (L.) Pursh | ANNEQ |
| Anemone richardsonii | Jurtsevia richardsonii (Hook.) A.& D. L?ve | JURI |
| Anemone tetonensis | Anemone multifida Poir. var. tetonensis (Porter ex Britt.) C.L. Hitchc. | ANMUT |
| Anemone tuberosa var. texana | Anemone okennonii Keener & Dutton | ANOK |
| Anemone virginiana var. alba | Anemone cylindrica Gray var. alba Oakes | ANCYA |
| Anemone virginiana var. alba | Anemone riparia Fern. | ANRI2 |
| Anemone virginiana var. alba | Anemone virginiana L. var. riparia (Fern.) Boivin | ANVIR |
| Appalachian bugbane | Actaea rubifolia (Kearney) Kartesz | ACRU14 |
| Aquilegia caerulea | Aquilegia coerulea James [orthographic variant] | AQCO |
| Aquilegia caerulea var. alpina | Aquilegia coerulea James var. alpina A. Nels. [orthographic variant] | AQCOA |
| Aquilegia caerulea var. caerulea | Aquilegia coerulea James var. coerulea James [orthographic variant] | AQCOC |
| Aquilegia caerulea var. daileyae | Aquilegia coerulea James var. daileyae Eastw. [orthographic variant] | AQCOD |
| Aquilegia caerulea var. ochroleuca | Aquilegia coerulea James var. ochroleuca Hook. [orthographic variant] | AQCOO |
| Aquilegia caerulea var. pinetorum | Aquilegia coerulea James var. pinetorum (Tidestrom) Payson ex Kearney & Peebles [orthographic variant] | AQCOP |
| Aquilegia canadensis | Aquilegia australis Small | AQAU2 |
| Aquilegia canadensis | Aquilegia canadensis L. var. australis (Small) Munz | AQCAA |
| Aquilegia canadensis | Aquilegia canadensis L. var. coccinea (Small) Munz | AQCAC |
| Aquilegia canadensis | Aquilegia canadensis L. var. eminens (Greene) Boivin | AQCAE |
| Aquilegia canadensis | Aquilegia canadensis L. var. hybrida Hook. | AQCAH |
| Aquilegia canadensis | Aquilegia canadensis L. var. latiuscula (Greene) Munz | AQCAL |
| Aquilegia canadensis | Aquilegia coccinea Small | AQCO3 |
| Aquilegia canadensis | Aquilegia latiuscula Greene | AQLA2 |
| Aquilegia canadensis | Aquilegia phoenicantha Cory | AQPH2 |
| Aquilegia chrysantha var. chaplinei | Aquilegia chaplinei Standl. ex Payson | AQCH2 |
| Aquilegia chrysantha var. hinckleyana | Aquilegia hinckleyana Munz | AQHI |
| Aquilegia flavescens var. flavescens | Aquilegia formosa Fisch. ex DC. var. flavescens (S. Wats.) M.E. Peck | AQFOF3 |
| Aquilegia flavescens var. rubicunda | Aquilegia rubicunda Tidestrom | AQRU |
| Aquilegia formosa | Aquilegia formosa Fisch. ex DC. var. communis Boivin | AQFOC |
| Aquilegia formosa | Aquilegia formosa Fisch. ex DC. var. fosteri Welsh | AQFOF2 |
| Aquilegia formosa | Aquilegia formosa Fisch. ex DC. var. hypolasia (Greene) Munz | AQFOH |
| Aquilegia formosa | Aquilegia formosa Fisch. ex DC. var. megalantha Boivin | AQFOM |
| Aquilegia formosa | Aquilegia formosa Fisch. ex DC. var. pauciflora (Greene) Boothman | AQFOP |
| Aquilegia formosa | Aquilegia formosa Fisch. ex DC. var. truncata (Fisch. & C.A. Mey.) Baker | AQFOT |
| Aquilegia formosa | Aquilegia formosa Fisch. ex DC. var. wawawensis (Payson) St. John | AQFOW |
| Aquilegia formosa | Aquilegia fosteri (Welsh) Welsh | AQFO2 |
| Aquilegia formosa | Aquilegia mohavensis Munz | AQMO |
| Aquilegia formosa | Aquilegia shockleyi Eastw. | AQSH |
| Arizona buttercup | Ranunculus arizonicus J.G. Lemmon ex Gray | RAAR2 |
| Arizona clematis | Clematis hirsutissima Pursh var. arizonica (Heller) Erickson | CLHIA |
| Arizona monkshood | Aconitum infectum Greene | ACIN2 |
| Arizona mousetail | Myosurus cupulatus S. Wats. | MYCU |
| Arkansas meadow-rue | Thalictrum arkansanum Boivin | THAR |
| Arsene's buttercup | Ranunculus petiolaris Kunth ex DC. var. arsenei (L. Benson) T. Duncan | RAPEA2 |
| Asian virginsbower | Clematis florida Thunb. | CLFL |
| Australian buttercup | Ranunculus lappaceus Sm. | RALA9 |
| Azores buttercup | Ranunculus cortusifolius Willd. | RACO21 |
| Baker's delphinium | Delphinium bakeri Ewan | DEBA |
| baneberry | Actaea L. | ACTAE |
| baneberry | Actaea spicata L. | ACSP10 |
| basalt larkspur | Delphinium basalticum Warnock | DEBA9 |
| Bigelow's leather flower | Clematis bigelovii Torr. | CLBI2 |
| black baneberry | Actaea racemosa L. | ACRA7 |
| black bugbane | Actaea racemosa L. var. racemosa | ACRAR |
| black cumin | Nigella sativa L. | NISA2 |
| black hellebore | Helleborus niger L. | HENI6 |
| Black Hills meadow-rue | Thalictrum nigromontanum Boivin | THNI |
| blisterwort | Ranunculus recurvatus Poir. | RARE2 |
| blisterwort | Ranunculus recurvatus Poir. var. recurvatus | RARER2 |
| blisterwort | Ranunculus recurvatus Poir. var. tropicus (Griseb.) Fawcett & Rendle | RARET2 |
| Blochman's larkspur | Delphinium parryi Gray ssp. blochmaniae (Greene) Lewis & Epling | DEPAB |
| blooddrops | Adonis annua L. | ADAN |
| Bloomer's buttercup | Ranunculus orthorhynchus Hook. var. bloomeri (S. Wats.) L. Benson | RAORB |
| blue limestone columbine | Aquilegia jonesii Parry var. elatior (Standl.) Boothman | AQJOE |
| Blue Mountain buttercup | Ranunculus oresterus L. Benson | RAOR2 |
| blue windflower | Anemone oregana Gray | ANOR |
| blue windflower | Anemone oregana Gray var. oregana | ANORO |
| bluebill | Clematis pitcheri Torr. & Gray | CLPI |
| bluebill | Clematis pitcheri Torr. & Gray var. dictyota (Greene) Dennis | CLPID |
| bluebill | Clematis pitcheri Torr. & Gray var. pitcheri | CLPIP |
| Brandegee's buttercup | Ranunculus macauleyi Gray var. brandegeei L. Benson | RAMAB |
| bristly buttercup | Ranunculus hispidus Michx. | RAHI |
| bristly buttercup | Ranunculus hispidus Michx. var. caricetorum (Greene) T. Duncan | RAHIC |
| bristly buttercup | Ranunculus hispidus Michx. var. hispidus | RAHIH |
| bristly buttercup | Ranunculus hispidus Michx. var. nitidus (Chapman) T. Duncan | RAHIN |
| bristly mousetail | Myosurus apetalus C. Gay | MYAP |
| bristly mousetail | Myosurus apetalus C. Gay var. borealis Whittemore | MYAPB |
| bristly mousetail | Myosurus apetalus C. Gay var. montanus (Campbell) Whitemore | MYAPM |
| bugbane | Trautvetteria Fisch. & C.A. Mey. | TRAUT |
| buttercup | Ranunculus L. | RANUN |
| Byron larkspur | Delphinium recurvatum Greene | DERE2 |
| cabellos de angel | Clematis dioica L. | CLDI3 |
| California buttercup | Ranunculus californicus Benth. | RACA2 |
| California clematis | Clematis ligusticifolia Nutt. var. californica S. Wats. | CLLIC |
| California larkspur | Delphinium californicum Torr. & Gray | DECA |
| California larkspur | Delphinium californicum Torr. & Gray ssp. californicum | DECAC |
| California larkspur | Delphinium californicum Torr. & Gray ssp. interius (Eastw.) Ewan | DECAI |
| Caltha leptosepala ssp. howellii | Caltha biflora DC. | CABI2 |
| Caltha leptosepala ssp. howellii | Caltha biflora DC. ssp. howellii (Huth) Abrams | CABIH3 |
| Caltha leptosepala ssp. howellii | Caltha howellii Huth | CAHO17 |
| Caltha leptosepala ssp. howellii | Caltha leptosepala DC. ssp. biflora (DC.) P.G. Sm. | CALEB2 |
| Caltha leptosepala ssp. howellii | Caltha leptosepala DC. var. biflora (DC.) Lawson | CALEB3 |
| Caltha leptosepala ssp. leptosepala var. leptosepala | Caltha biflora DC. var. rotundifolia (Huth) C.L. Hitchc. | CABIR |
| Caltha leptosepala ssp. leptosepala var. leptosepala | Caltha chelidonii Greene | CACH22 |
| Caltha leptosepala ssp. leptosepala var. leptosepala | Caltha leptosepala DC. var. rotundifolia Huth | CALER |
| Caltha leptosepala ssp. leptosepala var. leptosepala | Psychrophila leptosepala (DC.) W.A. Weber | PSLE |
| Caltha natans | Thacla natans (Pallas ex Georgi) Deyl & Soj | THNA2 |
| Caltha palustris var. palustris | Caltha asarifolia DC. | CAAS7 |
| Caltha palustris var. palustris | Caltha natans Pallas ex Georgi var. asarifolia (DC.) Huth | CANAA3 |
| Caltha palustris var. palustris | Caltha palustris L. ssp. asarifolia (DC.) Hult | CAPAA6 |
| Caltha palustris var. palustris | Caltha palustris L. var. asarifolia (DC.) Rothrock | CAPAA5 |
| Caltha palustris var. palustris | Caltha palustris L. var. flabellifolia (Pursh) Torr. & Gray | CAPAF |
| Caltha palustris var. radicans | Caltha arctica R. Br. | CAAR25 |
| Caltha palustris var. radicans | Caltha minor P. Mill. ssp. arctica (R. Br.) A.& D. L?ve | CAMIA |
| Caltha palustris var. radicans | Caltha natans Pallas ex Georgi var. arctica (R. Br.) Hult | CANAA2 |
| Caltha palustris var. radicans | Caltha palustris L. ssp. arctica (R. Br.) Hult | CAPAA4 |
| Caltha palustris var. radicans | Caltha palustris L. var. radicans (J.R. Forst.) Huth | CAPAR |
| Caltha palustris var. radicans | Caltha palustris L. var. zetlandica Beeby | CAPAZ |
| Caltha palustris var. radicans | Caltha radicans J.R. Forst. | CARA15 |
| Caltha palustris var. radicans | Caltha zetlandica (Beeby) Dorfl. | CAZE2 |
| Canadian anemone | Anemone canadensis L. | ANCA8 |
| candle anemone | Anemone cylindrica Gray | ANCY |
| candle larkspur | Delphinium elatum L. | DEEL2 |
| Carmichael's monkshood | Aconitum carmichaelii Debeaux | ACCA20 |
| Carolina anemone | Anemone caroliniana Walt. | ANCA9 |
| Carolina bugbane | Trautvetteria caroliniensis (Walt.) Vail | TRCA |
| Carolina bugbane | Trautvetteria caroliniensis (Walt.) Vail var. caroliniensis | TRCAC2 |
| Carolina larkspur | Delphinium carolinianum Walt. | DECA3 |
| Carolina larkspur | Delphinium carolinianum Walt. ssp. calciphilum Warnock | DECAC2 |
| Carolina larkspur | Delphinium carolinianum Walt. ssp. carolinianum | DECAC3 |
| Carolina larkspur | Delphinium carolinianum Walt. ssp. vimineum (D. Don) Warnock | DECAV |
| Carolina larkspur | Delphinium carolinianum Walt. ssp. virescens (Nutt.) R.E. Brooks | DECAV2 |
| Carter's buttercup | Ranunculus bonariensis Poir. | RABO |
| Carter's buttercup | Ranunculus bonariensis Poir. var. trisepalus (Gillies ex Hook. & Arn.) Lourteig | RABOT |
| Cathedral Bluff meadow-rue | Thalictrum heliophilum Wilken & DeMott | THHE2 |
| Ceratocephala testiculata | Ceratocephala falcata auct. non (L.) Pers. [misapplied] | CEFA |
| Ceratocephala testiculata | Ceratocephala orthoceras DC. | CEOR2 |
| Ceratocephala testiculata | Ranunculus falcatus auct. non L. [misapplied] | RAFA3 |
| Ceratocephala testiculata | Ranunculus testiculatus Crantz | RATE |
| Chamisso's larkspur | Delphinium chamissonis Pritz. ex Walp. | DECH |
| Chaplin's golden columbine | Aquilegia chrysantha Gray var. chaplinei (Standl. ex Payson) Lott | AQCHC |
| Chiricahua Mountain columbine | Aquilegia triternata Payson | AQTR |
| Chiricahua Mountain larkspur | Delphinium andesicola Ewan | DEAN2 |
| Clark Valley larkspur | Delphinium geraniifolium Rydb. | DEGE |
| Clematis addisonii | Clematis viornioides Britt. | CLVI11 |
| Clematis addisonii | Coriflora addisonii (Britt.) W.A. Weber | COAD2 |
| Clematis addisonii | Viorna addisonii (Britt.) Small | VIAD5 |
| Clematis albicoma | Coriflora albicoma (Wherry) W.A. Weber | COAL7 |
| Clematis baldwinii var. baldwinii | Coriflora baldwinii (Torr. & Gray) W.A. Weber | COBA7 |
| Clematis baldwinii var. baldwinii | Viorna baldwinii (Torr. & Gray) Small | VIBA4 |
| Clematis bigelovii | Coriflora bigelovii (Torr.) W.A. Weber | COBI4 |
| Clematis catesbyana | Clematis micrantha Small | CLMI4 |
| Clematis coactilis | Clematis albicoma Wherry var. coactilis Fern. | CLALC |
| Clematis columbiana var. columbiana | Atragene columbiana Nutt. | ATCO7 |
| Clematis columbiana var. columbiana | Clematis pseudoalpina (Kuntze) A. Nels. | CLPS2 |
| Clematis columbiana var. columbiana | Clematis verticillaris DC. var. columbiana (Nutt.) Gray | CLVEC |
| Clematis columbiana var. tenuiloba | Clematis tenuiloba Gray | CLTE8 |
| Clematis crispa | Clematis crispa L. var. walteri Pursh | CLCRW |
| Clematis crispa | Coriflora crispa (L.) W.A. Weber | COCR3 |
| Clematis crispa | Viorna crispa (L.) Small | VICR3 |
| Clematis crispa | Viorna crispa (L.) Small var. walteri (Pursh) Small | VICRW |
| Clematis crispa | Viorna obliqua Small | VIOB4 |
| Clematis fremontii | Clematis fremontii S. Wats. var. riehlii Erickson | CLFRR |
| Clematis fremontii | Coriflora fremontii (S. Wats.) W.A. Weber | COFR4 |
| Clematis fremontii | Viorna fremontii (S. Wats.) Heller | VIFR |
| Clematis glaucophylla | Coriflora glaucophylla (Small) W.A. Weber | COGL10 |
| Clematis glaucophylla | Viorna glaucophylla (Small) Small | VIGL3 |
| Clematis hirsuta | Clematis incisodentata A. Rich. | CLIN5 |
| Clematis hirsutissima var. hirsutissima | Coriflora hirsutissima (Pursh) W.A. Weber | COHI5 |
| Clematis hirsutissima var. scottii | Clematis scottii Porter | CLSC2 |
| Clematis hirsutissima var. scottii | Coriflora scottii (Porter) W.A. Weber | COSC9 |
| Clematis hirsutissima var. scottii | Viorna scottii (Porter) Rydb. | VISC2 |
| Clematis ligusticifolia | Clematis brevifolia Howell | CLBR6 |
| Clematis ligusticifolia var. ligusticifolia | Clematis neomexicana Woot. & Standl. | CLNE2 |
| Clematis ligusticifolia var. ligusticifolia | Clematis suksdorfii B.L. Robins. | CLSU5 |
| Clematis morefieldii | Coriflora morefieldii (Kral) W.A. Weber | COMO12 |
| Clematis occidentalis var. dissecta | Clematis columbiana (Nutt.) Torr. & Gray var. dissecta C.L. Hitchc. | CLCOD2 |
| Clematis occidentalis var. grosseserrata | Clematis occidentalis (Hornem.) DC. ssp. grosseserrata (Rydb.) Taylor & MacBryde | CLOCG2 |
| Clematis occidentalis var. occidentalis | Atragene americana Sims | ATAM2 |
| Clematis occidentalis var. occidentalis | Atragene occidentalis Hornem. | ATOC |
| Clematis occidentalis var. occidentalis | Clematis verticillaris DC. | CLVE3 |
| Clematis occidentalis var. occidentalis | Clematis verticillaris DC. var. cacuminis Fern. | CLVEC2 |
| Clematis occidentalis var. occidentalis | Clematis verticillaris DC. var. grandiflora Boivin | CLVEG |
| Clematis ochroleuca | Coriflora ochroleuca (Ait.) W.A. Weber | COOC4 |
| Clematis ochroleuca | Viorna ochroleuca (Ait.) Small | VIOC2 |
| Clematis ochroleuca | Viorna ovata (Pursh) Small | VIOV3 |
| Clematis orientalis | Clematis aurea A. Nels. & J.F. Macbr. | CLAU3 |
| Clematis orientalis | Viticella orientalis (L.) W.A. Weber | VIOR3 |
| Clematis palmeri | Coriflora palmeri (Rose) W.A. Weber | COPA25 |
| Clematis pitcheri var. dictyota | Clematis dictyota Greene | CLDI5 |
| Clematis pitcheri var. pitcheri | Clematis filifera Benth. | CLFI |
| Clematis pitcheri var. pitcheri | Clematis pitcheri Torr. & Gray var. filifera (Benth.) B.L. Robins. ex Gray | CLPIF |
| Clematis pitcheri var. pitcheri | Coriflora pitcheri (Torr. & Gray) W.A. Weber | COPI6 |
| Clematis pitcheri var. pitcheri | Viorna pitcheri (Torr. & Gray) Britt. | VIPI |
| Clematis reticulata | Coriflora reticulata (Walt.) W.A. Weber | CORE6 |
| Clematis reticulata | Viorna reticulata (Walt.) Small | VIRE10 |
| Clematis reticulata | Viorna subreticulata Harbison ex Small | VISU6 |
| Clematis terniflora | Clematis dioscoreifolia Levl. & Vaniot | CLDI7 |
| Clematis terniflora | Clematis dioscoreifolia Levl. & Vaniot var. robusta (Carr.) Rehd. | CLDIR |
| Clematis terniflora | Clematis maximowicziana Franch. & Savigny | CLMA5 |
| Clematis terniflora | Clematis paniculata Thunb. | CLPA12 |
| Clematis terniflora var. mandshurica | Clematis mandshurica Rupr. | CLMA22 |
| Clematis terniflora var. mandshurica | Clematis recta L. var. mandshurica (Rupr.) Maxim. | CLREM2 |
| Clematis terniflora var. terniflora | Clematis terniflora DC. var. robusta (Carriere) Tamura | CLTER |
| Clematis texensis | Clematis coccinea Engelm. | CLCO9 |
| Clematis texensis | Coriflora texensis (Buckl.) W.A. Weber | COTE10 |
| Clematis versicolor | Coriflora versicolor (Small ex Rydb.) W.A. Weber | COVE9 |
| Clematis versicolor | Viorna versicolor (Small ex Rydb.) Small | VIVE3 |
| Clematis viorna | Clematis beadlei (Small) Erickson | CLBE2 |
| Clematis viorna | Clematis gattingeri Small | CLGA |
| Clematis viorna | Clematis viorna L. var. flaccida (Small) Erickson | CLVIF |
| Clematis viorna | Coriflora beadlei (Small) W.A. Weber | COBE5 |
| Clematis viorna | Coriflora gattingeri (Small) W.A. Weber | COGA2 |
| Clematis viorna | Coriflora viorna (L.) W.A. Weber | COVI10 |
| Clematis viorna | Viorna beadlei Small | VIBE8 |
| Clematis viorna | Viorna flaccida (Small) Small | VIFL4 |
| Clematis viorna | Viorna gattingeri (Small) Small | VIGA |
| Clematis viorna | Viorna ridgwayi Standl. | VIRI3 |
| Clematis viorna | Viorna viorna (L.) Small | VIVI8 |
| Clematis virginiana | Clematis virginiana L. var. missouriensis (Rydb.) Palmer & Steyermark | CLVIM |
| Clematis viticaulis | Coriflora viticaulis (Steele) W.A. Weber | COVI11 |
| Clematis viticella | Viticella viticella (L.) Small | VIVI6 |
| coastal larkspur | Delphinium decorum Fisch. & C.A. Mey. | DEDE |
| coastal larkspur | Delphinium decorum Fisch. & C.A. Mey. ssp. decorum | DEDED |
| coastal larkspur | Delphinium decorum Fisch. & C.A. Mey. ssp. tracyi Ewan | DEDET |
| Colorado alpine columbine | Aquilegia caerulea James var. alpina A. Nels. | AQCAA2 |
| Colorado blue columbine | Aquilegia caerulea James | AQCA2 |
| Colorado blue columbine | Aquilegia caerulea James var. caerulea | AQCAC2 |
| Colorado blue columbine | Aquilegia caerulea James var. pinetorum (Tidestrom) Payson ex Kearney & Peebles | AQCAP |
| Colorado buttercup | Ranunculus coloradensis (L. Benson) L. Benson | RACO10 |
| Colorado larkspur | Delphinium alpestre Rydb. | DEAL |
| Columbian larkspur | Delphinium trolliifolium Gray | DETR2 |
| Columbian monkshood | Aconitum columbianum Nutt. | ACCO4 |
| Columbian monkshood | Aconitum columbianum Nutt. ssp. columbianum | ACCOC3 |
| Columbian monkshood | Aconitum columbianum Nutt. ssp. viviparum (Greene) D.E. Brink | ACCOV2 |
| Columbian windflower | Anemone deltoidea Hook. | ANDE3 |
| columbine | Aquilegia L. | AQUIL |
| columbine meadow-rue | Thalictrum aquilegifolium L. | THAQ |
| common Australian buttercup | Ranunculus plebeius R. Br. ex DC. | RAPL2 |
| Consolida ajacis | Consolida ambigua (L.) P.W. Ball & Heywood | COAM4 |
| Consolida ajacis | Delphinium ajacis L. | DEAJ |
| Consolida ajacis | Delphinium ambiguum L. | DEAM2 |
| Consolida orientalis | Delphinium orientale J. Gay | DEOR |
| Consolida regalis | Delphinium consolida L. | DECO6 |
| Cooley's false buttercup | Kumlienia cooleyae (Vasey & Rose) Greene | KUCO |
| Cooley's meadow-rue | Thalictrum cooleyi Ahles | THCO5 |
| Coptis trifolia | Coptis groenlandica (Oeder) Fern. | COGR13 |
| Coptis trifolia | Coptis trifolia (L.) Salisb. ssp. groenlandica (Oeder) Hult | COTRG |
| Coptis trifolia | Coptis trifolia (L.) Salisb. var. groenlandica (Oeder) Fassett | COTRG2 |
| corn buttercup | Ranunculus arvensis L. | RAAR3 |
| creeping buttercup | Ranunculus repens L. | RARE3 |
| curlyheads | Clematis ochroleuca Ait. | CLOC |
| cursed buttercup | Ranunculus sceleratus L. | RASC3 |
| cursed buttercup | Ranunculus sceleratus L. var. multifidus Nutt. | RASCM |
| cursed buttercup | Ranunculus sceleratus L. var. sceleratus | RASCS |
| curveseed butterwort | Ceratocephala Moench | CERAT3 |
| curveseed butterwort | Ceratocephala testiculata (Crantz) Bess. | CETE5 |
| cutleaf anemone | Pulsatilla patens (L.) P. Mill. ssp. multifida (Pritz.) Zamels | PUPAM |
| Dailey's columbine | Aquilegia caerulea James var. daileyae Eastw. | AQCAD |
| Davis's buttercup | Ranunculus alismifolius Geyer ex Benth. var. davisii L. Benson | RAALD |
| delicate buttercup | Ranunculus hebecarpus Hook. & Arn. | RAHE |
| Delphinium ?burkei | Delphinium burkei Greene ssp. distichiflorum (Hook.) Ewan | DEBUD |
| Delphinium ?burkei | Delphinium burkei Greene var. distichiflorum (Hook.) St. John | DEBUD2 |
| Delphinium ?burkei | Delphinium strictum A. Nels. | DEST3 |
| Delphinium ?burkei | Delphinium strictum A. Nels. var. distichiflorum (Hook.) St. John | DESTD |
| Delphinium ?occidentale | Delphinium cucullatum A. Nels. | DECU5 |
| Delphinium ?occidentale | Delphinium elatum L. var. occidentale S. Wats. | DEELO |
| Delphinium ?occidentale | Delphinium occidentale (S. Wats.) S. Wats. ssp. cucullatum (A. Nels.) Ewan | DEOCC |
| Delphinium ?occidentale | Delphinium occidentale (S. Wats.) S. Wats. ssp. quercicola Ewan | DEOCQ |
| Delphinium ?occidentale | Delphinium occidentale (S. Wats.) S. Wats. var. cucullatum (A. Nels.) R.J. Davis | DEOCC2 |
| Delphinium ?occidentale | Delphinium scopulorum Gray ssp. occidentale (S. Wats.) Abrams | DESCO |
| Delphinium alpestre | Delphinium ramosum Rydb. var. alpestre (Rydb.) W.A. Weber | DERAA |
| Delphinium andersonii | Delphinium andersonii Gray ssp. cognatum (Greene) Ewan | DEANC |
| Delphinium andersonii | Delphinium andersonii Gray var. cognatum (Greene) R.J. Davis | DEANC2 |
| Delphinium andersonii | Delphinium cognatum Greene | DECO7 |
| Delphinium andersonii | Delphinium xylorrhizum Rydb. | DEXY |
| Delphinium andesicola | Delphinium andesicola Ewan ssp. amplum (Ewan) Ewan | DEANA |
| Delphinium andesicola | Delphinium sierrae-blancae Woot. ssp. amplum Ewan | DESIA |
| Delphinium barbeyi | Delphinium exaltatum Ait. var. barbeyi Huth | DEEXB |
| Delphinium barbeyi | Delphinium occidentale (S. Wats.) S. Wats. var. barbeyi (Huth) Welsh | DEOCB |
| Delphinium bicolor ssp. bicolor | Delphinium nuttallianum Pritz ex Walp. var. pilosa C.L. Hitchc. | DENUP |
| Delphinium brachycentrum | Delphinium ruthiae A. Nels. | DERU2 |
| Delphinium californicum ssp. interius | Delphinium californicum Torr. & Gray var. interius Eastw. | DECAI2 |
| Delphinium carolinianum ssp. carolinianum | Delphinium azureum Michx. | DEAZ |
| Delphinium carolinianum ssp. carolinianum | Delphinium azureum Michx. var. nortonianum (Mackenzie & Bush) Palmer & Steyermark | DEAZN |
| Delphinium carolinianum ssp. carolinianum | Delphinium carolinianum Walt. var. crispum Perry | DECAC4 |
| Delphinium carolinianum ssp. carolinianum | Delphinium carolinianum Walt. var. nortonianum (Mackenzie & Bush) Perry | DECAN |
| Delphinium carolinianum ssp. vimineum | Delphinium vimineum D. Don | DEVI5 |
| Delphinium carolinianum ssp. vimineum | Delphinium virescens Nutt. var. vimineum (D. Don) R.F. Martin | DEVIV2 |
| Delphinium carolinianum ssp. virescens | Delphinium albescens Rydb. | DEAL4 |
| Delphinium carolinianum ssp. virescens | Delphinium carolinianum Walt. ssp. penardii (Huth) Warnock | DECAP |
| Delphinium carolinianum ssp. virescens | Delphinium penardii Huth | DEPE |
| Delphinium carolinianum ssp. virescens | Delphinium virescens Nutt. | DEVI |
| Delphinium carolinianum ssp. virescens | Delphinium virescens Nutt. ssp. penardii (Huth) Ewan | DEVIP2 |
| Delphinium carolinianum ssp. virescens | Delphinium virescens Nutt. var. macroceratilis (Rydb.) Cory | DEVIM |
| Delphinium carolinianum ssp. virescens | Delphinium virescens Nutt. var. penardii (Huth) Perry | DEVIP |
| Delphinium depauperatum | Delphinium cyanoreios Piper | DECY |
| Delphinium depauperatum | Delphinium diversifolium Greene | DEDI8 |
| Delphinium depauperatum | Delphinium diversifolium Greene ssp. harneyense Ewan | DEDIH |
| Delphinium depauperatum | Delphinium diversifolium Greene var. harneyense (Ewan) R.J. Davis | DEDIH2 |
| Delphinium geraniifolium | Delphinium amplibracteatum Woot. | DEAM3 |
| Delphinium geraniifolium | Delphinium tenuisectum Greene ssp. amplibracteatum (Woot.) Ewan | DETEA |
| Delphinium glareosum | Delphinium caprorum Ewan | DECA11 |
| Delphinium glareosum | Delphinium glareosum Greene ssp. caprorum (Ewan) Ewan | DEGLC |
| Delphinium glareosum | Delphinium glareosum Greene var. caprorum (Ewan) W.H. Baker | DEGLC2 |
| Delphinium glaucum | Delphinium brownii Rydb. | DEBR4 |
| Delphinium glaucum | Delphinium scopulorum auct. non Gray [misapplied] | DESC7 |
| Delphinium glaucum | Delphinium scopulorum Gray var. glaucum (S. Wats.) Gray | DESCG |
| Delphinium gracilentum | Delphinium greenei Eastw. | DEGR7 |
| Delphinium gracilentum | Delphinium patens Benth. ssp. greenei (Eastw.) Ewan | DEPAG |
| Delphinium gracilentum | Delphinium pratense Eastw. | DEPR |
| Delphinium hansenii ssp. hansenii | Delphinium hansenii (Greene) Greene ssp. arcuatum (Greene) Ewan | DEHAA |
| Delphinium hansenii ssp. hansenii | Delphinium hesperium Gray var. hansenii Greene | DEHEH2 |
| Delphinium hansenii ssp. kernense | Delphinium hansenii (Greene) Greene var. kernense A. Davids. | DEHAK2 |
| Delphinium hesperium ssp. cuyamacae | Delphinium cuyamacae Abrams | DECU4 |
| Delphinium inopinum | Delphinium parishii Gray var. inopinum Jepson | DEPAI |
| Delphinium lineapetalum | Delphinium lineapetalum Ewan ssp. klickitatense Ewan | DELIK |
| Delphinium lineapetalum | Delphinium nuttallianum Pritz. ex Walp. var. lineapetalum (Ewan) C.L. Hitchc. | DENUL |
| Delphinium menziesii ssp. menziesii | Delphinium menziesii DC. ssp. pyramidale Ewan | DEMEP2 |
| Delphinium menziesii ssp. menziesii | Delphinium menziesii DC. var. pyramidale (Ewan) C.L. Hitchc. | DEMEP |
| Delphinium novomexicanum | Delphinium sierrae-blancae Woot. | DESI4 |
| Delphinium nuttallianum | Delphinium nelsonii Greene | DENE3 |
| Delphinium nuttallianum | Delphinium nelsonii Greene ssp. utahense (S. Wats.) Ewan | DENEU |
| Delphinium nuttallianum | Delphinium nuttallianum Pritz. ex Walp. var. fulvum C.L. Hitchc. | DENUF |
| Delphinium nuttallianum | Delphinium nuttallianum Pritz. ex Walp. var. levicaule C.L. Hitchc. | DENUL2 |
| Delphinium nuttallianum | Delphinium sonnei Greene | DESO |
| Delphinium nuttallii ssp. nuttallii | Delphinium oreganum T.J. Howell | DEOR2 |
| Delphinium nuttallii ssp. ochroleucum | Delphinium leucophaeum Greene | DELE |
| Delphinium parishii ssp. pallidum | Delphinium amabile Tidestrom ssp. pallidum (Munz) Ewan | DEAMP |
| Delphinium parishii ssp. pallidum | Delphinium parishii Gray var. pallidum Munz | DEPAP8 |
| Delphinium parishii ssp. parishii | Delphinium amabile Tidestrom | DEAM |
| Delphinium parishii ssp. parishii | Delphinium amabile Tidestrom ssp. apachense (Eastw.) Ewan | DEAMA |
| Delphinium parishii ssp. parishii | Delphinium amabile Tidestrom ssp. clarianum Ewan | DEAMC |
| Delphinium parishii ssp. parishii | Delphinium apachense Eastw. | DEAP |
| Delphinium parishii ssp. subglobosum | Delphinium subglobosum Wiggins | DESU3 |
| Delphinium parryi ssp. blochmaniae | Delphinium blochmaniae Greene | DEBL |
| Delphinium parryi ssp. parryi | Delphinium hesperium Gray var. seditiosum Jepson | DEHES2 |
| Delphinium parryi ssp. parryi | Delphinium parryi Gray ssp. seditiosum (Jepson) Ewan | DEPAS2 |
| Delphinium parryi ssp. purpureum | Delphinium parishii Gray ssp. purpureum Lewis & Epling | DEPAP |
| Delphinium patens ssp. montanum | Delphinium parryi Gray var. montanum Munz | DEPAM3 |
| Delphinium patens ssp. patens | Delphinium decorum Fisch. & C.A. Mey. var. patens (Benth.) Gray | DEDEP |
| Delphinium polycladon | Delphinium luporum Greene | DELU3 |
| Delphinium polycladon | Delphinium scopulorum Gray var. luporum (Greene) Jepson | DESCL |
| Delphinium purpusii | Delphinium roseum Heller | DERO4 |
| Delphinium recurvatum | Delphinium hesperium Gray var. recurvatum (Greene) K.C. Davis | DEHER |
| Delphinium scaposum | Delphinium andersonii Gray var. scaposum (Greene) Welsh | DEANS |
| Delphinium scopulorum | Delphinium ?macrophyllum Woot. (pro sp.) [not hybrid] | DEMA4 |
| Delphinium stachydeum | Delphinium scopulorum Gray var. stachydeum Gray | DESCS |
| Delphinium stachydeum | Delphinium umatillense Ewan | DEUM2 |
| Delphinium variegatum ssp. kinkiense | Delphinium kinkiense Munz | DEKI |
| Delphinium variegatum ssp. variegatum | Delphinium variegatum Torr. & Gray ssp. apiculatum (Greene) Ewan | DEVAA |
| Delphinium variegatum ssp. variegatum | Delphinium variegatum Torr. & Gray var. apiculatum Greene | DEVAA2 |
| Delphinium wootonii | Delphinium geyeri Greene var. wootonii (Rydb.) K.C. Davis | DEGEW |
| Delphinium wootonii | Delphinium virescens Nutt. ssp. wootonii (Rydb.) Ewan | DEVIW |
| Delphinium wootonii | Delphinium virescens Nutt. var. wootonii (Rydb.) Shinners | DEVIW2 |
| desert columbine | Aquilegia desertorum (M.E. Jones) Cockerell ex Heller | AQDE |
| desert larkspur | Delphinium parishii Gray | DEPA |
| desolation columbine | Aquilegia desolatica Welsh & Atwood | AQDE2 |
| devil in the bush | Nigella damascena L. | NIDA |
| devil's darning needles | Clematis virginiana L. | CLVI5 |
| doubtful knight's-spur | Consolida ajacis (L.) Schur | COAJ |
| Drummond's anemone | Anemone drummondii S. Wats. | ANDR |
| Drummond's anemone | Anemone drummondii S. Wats. ssp. drummondii | ANDRD |
| Drummond's clematis | Clematis drummondii Torr. & Gray | CLDR |
| dwarf larkspur | Delphinium tricorne Michx. | DETR |
| Earle's buttercup | Ranunculus uncinatus D. Don ex G. Don var. earlei (Greene) L. Benson | RAUNE |
| early buttercup | Ranunculus fascicularis Muhl. ex Bigelow | RAFA |
| early meadow-rue | Thalictrum dioicum L. | THDI |
| eastern false rue anemone | Enemion biternatum Raf. | ENBI |
| eastern pasqueflower | Pulsatilla patens (L.) P. Mill. | PUPA5 |
| eastern pasqueflower | Pulsatilla patens (L.) P. Mill. ssp. patens (L.) P. Mill. [excluded] | PUPAP2 |
| Eastwood's buttercup | Ranunculus eastwoodianus L. Benson | RAEA |
| Eastwood's larkspur | Delphinium parryi Gray ssp. eastwoodiae Ewan | DEPAE2 |
| Edwards Plateau thimbleweed | Anemone edwardsiana Tharp | ANED2 |
| Edwards Plateau thimbleweed | Anemone edwardsiana Tharp var. edwardsiana | ANEDE |
| Edwards Plateau thimbleweed | Anemone edwardsiana Tharp var. petraea Correll | ANEDP |
| Eldorado larkspur | Delphinium hansenii (Greene) Greene | DEHA |
| Eldorado larkspur | Delphinium hansenii (Greene) Greene ssp. hansenii | DEHAH |
| elliptical buttercup | Ranunculus glaberrimus Hook. var. ellipticus (Greene) Greene | RAGLE |
| Enemion biternatum | Isopyrum biternatum (Raf.) Torr. & Gray | ISBI2 |
| Enemion hallii | Isopyrum hallii Gray | ISHA3 |
| Enemion occidentale | Isopyrum occidentale Hook. & Arn. | ISOC3 |
| Enemion stipitatum | Isopyrum stipitatum Gray | ISST2 |
| eranthis | Eranthis Salisb. | ERANT2 |
| Eranthis hyemalis | Helleborus hyemalis L. | HEHY4 |
| Eschscholtz's buttercup | Ranunculus eschscholtzii Schlecht. | RAES |
| Eschscholtz's buttercup | Ranunculus eschscholtzii Schlecht. var. eschscholtzii | RAESE2 |
| Eschscholtz's buttercup | Ranunculus eschscholtzii Schlecht. var. oxynotus (Gray) Jepson | RAESO |
| European columbine | Aquilegia vulgaris L. | AQVU |
| European pasqueflower | Pulsatilla vulgaris Miller | PUVU |
| European thimbleweed | Anemone nemorosa L. | ANNE4 |
| evergreen clematis | Clematis vitalba L. | CLVI6 |
| Ewan's larkspur | Delphinium hansenii (Greene) Greene ssp. ewanianum Warnock | DEHAE |
| fall buttercup | Ranunculus aestivalis (L. Benson) Van Buren & Harper | RAAE |
| false buttercup | Kumlienia Greene | KUMLI |
| false rue anemone | Enemion Raf. | ENEMI |
| fan columbine | Aquilegia flabellata Siebold & Zucc. | AQFL2 |
| Felix anemone | Anemone oregana Gray var. felix (M.E. Peck) C.L. Hitchc. | ANORF |
| Fendler's meadow-rue | Thalictrum fendleri Engelm. ex Gray | THFE |
| Fendler's meadow-rue | Thalictrum fendleri Engelm. ex Gray var. fendleri | THFEF |
| Fendler's meadow-rue | Thalictrum fendleri Engelm. ex Gray var. polycarpum Torr. | THFEP2 |
| fernleaf goldthread | Coptis aspleniifolia Salisb. | COAS |
| fewflower meadow-rue | Thalictrum sparsiflorum Turcz. ex Fisch. & C.A. Mey. | THSP |
| fewflower meadow-rue | Thalictrum sparsiflorum Turcz. ex Fisch. & C.A. Mey. var. saximontanum Boivin | THSPS |
| fig buttercup | Ranunculus ficaria L. | RAFI |
| fig buttercup | Ranunculus ficaria L. var. bulbifera Marsden-Jones | RAFIB |
| Fischer monkshood | Aconitum fischeri Reichb. | ACFI3 |
| floating marsh marigold | Caltha natans Pallas ex Georgi | CANA |
| foothill larkspur | Delphinium hesperium Gray | DEHE |
| foothill larkspur | Delphinium hesperium Gray ssp. cuyamacae (Abrams) Lewis & Epling | DEHEC |
| foothill larkspur | Delphinium hesperium Gray ssp. hesperium | DEHEH |
| foothill larkspur | Delphinium hesperium Gray ssp. pallescens (Ewan) Lewis & Epling | DEHEP |
| fragrant clematis | Clematis flammula L. | CLFL8 |
| Fremont's leather flower | Clematis fremontii S. Wats. | CLFR |
| frogbit buttercup | Ranunculus hydrocharoides Gray | RAHY |
| frogbit buttercup | Ranunculus hydrocharoides Gray var. hydrocharoides | RAHYH |
| frogbit buttercup | Ranunculus hydrocharoides Gray var. stolonifer (Hemsl.) L. Benson | RAHYS |
| Geyer's larkspur | Delphinium geyeri Greene | DEGE2 |
| glacier buttercup | Ranunculus glacialis L. | RAGL2 |
| glacier buttercup | Ranunculus glacialis L. var. chamissonis (Schlecht.) L. Benson | RAGLC2 |
| glade larkspur | Delphinium treleasei Bush ex K.C. Davis | DETR3 |
| globeflower | Trollius L. | TROLL |
| Gmelin's buttercup | Ranunculus gmelinii DC. | RAGM |
| golden columbine | Aquilegia chrysantha Gray | AQCH |
| golden columbine | Aquilegia chrysantha Gray var. chrysantha | AQCHC2 |
| goldenseal | Hydrastis canadensis L. | HYCA |
| goldthread | Coptis Salisb. | COPTI |
| Gorman's buttercup | Ranunculus gormanii Greene | RAGO |
| graceful buttercup | Ranunculus inamoenus Greene | RAIN |
| graceful buttercup | Ranunculus inamoenus Greene var. alpeophilus (A. Nels.) L. Benson | RAINA |
| graceful buttercup | Ranunculus inamoenus Greene var. inamoenus | RAINI2 |
| graceful buttercup | Ranunculus inamoenus Greene var. subaffinis (Gray) L. Benson | RAINS |
| Grahm's columbine | Aquilegia grahamii Welsh & Goodrich | AQGR |
| greater creeping spearwort | Ranunculus flammula L. | RAFL2 |
| greater creeping spearwort | Ranunculus flammula L. var. filiformis (Michx.) Hook. | RAFLF |
| greater creeping spearwort | Ranunculus flammula L. var. flammula | RAFLF2 |
| Greek thimbleweed | Anemone blanda Schott & Kotschy | ANBL2 |
| green hellebore | Helleborus viridis L. | HEVI |
| Greenland buttercup | Ranunculus auricomus L. | RAAU7 |
| ground virginsbower | Clematis recta L. | CLRE2 |
| hairy buttercup | Ranunculus sardous Crantz | RASA |
| hairy clematis | Clematis hirsutissima Pursh | CLHI |
| hairy clematis | Clematis hirsutissima Pursh var. hirsutissima | CLHIH |
| hairy knight's-spur | Consolida pubescens (DC.) So? | COPU21 |
| Harvey's buttercup | Ranunculus harveyi (Gray) Britt. | RAHA |
| Hawai'ian buttercup | Ranunculus hawaiensis Gray | RAHA2 |
| headachevine | Clematis microphylla DC. | CLMI8 |
| heartleaf buttercup | Ranunculus cardiophyllus Hook. | RACA4 |
| Heimburger's anemone | Anemone drummondii S. Wats. ssp. heimburgeri A.& D. L?ve | ANDRH |
| hellebore | Helleborus L. | HELLE |
| hepatica | Hepatica nobilis Schreber | HENO2 |
| hepatica | Hepatica P. Mill. | HEPAT |
| Hepatica nobilis var. acuta | Anemone acutiloba (DC.) G. Lawson | ANAC10 |
| Hepatica nobilis var. acuta | Hepatica acuta (Pursh) Britt. | HEAC7 |
| Hepatica nobilis var. acuta | Hepatica acutiloba DC. | HEAC4 |
| Hepatica nobilis var. acuta | Hepatica triloba Chaix var. acuta Pursh | HETRA |
| Hepatica nobilis var. obtusa | Anemone americana (DC.) Hara | ANAM8 |
| Hepatica nobilis var. obtusa | Anemone hepatica L. | ANHE6 |
| Hepatica nobilis var. obtusa | Hepatica americana (DC.) Ker-Gawl. | HEAM8 |
| Hepatica nobilis var. obtusa | Hepatica hepatica (L.) Karst. | HEHE8 |
| Hepatica nobilis var. obtusa | Hepatica triloba Chaix var. americana DC. | HETRA2 |
| high northern buttercup | Ranunculus hyperboreus Rottb. | RAHY2 |
| Hinckley's golden columbine | Aquilegia chrysantha Gray var. hinckleyana (Munz) Lott | AQCHH |
| Houston meadow-rue | Thalictrum texanum (Gray) Small | THTE |
| Howell's marsh marigold | Caltha leptosepala DC. ssp. howellii (Huth) P.G. Sm. | CALEH2 |
| Hudson's anemone | Anemone multifida Poir. var. hudsoniana DC. | ANMUH2 |
| Hulten's meadow-rue | Thalictrum hultenii Boivin | THHU2 |
| Huntsville vasevine | Clematis morefieldii Kral | CLMO6 |
| hyacinth-flower clematis | Clematis heracleifolia DC. | CLHE5 |
| hydrastis | Hydrastis L. | HYDRA2 |
| ice cold buttercup | Ranunculus karelinii Czern. | RAKA3 |
| Idaho buttercup | Ranunculus uncinatus D. Don ex G. Don var. parviflorus (Torr.) L. Benson | RAUNP |
| Idaho goldthread | Coptis occidentalis (Nutt.) Torr. & Gray | COOC |
| Indian aconite | Aconitum ferox Wallich ex Ser. | ACFE |
| Italian leather flower | Clematis viticella L. | CLVI7 |
| ivy buttercup | Ranunculus hederaceus L. | RAHE2 |
| Japanese thimbleweed | Anemone hupehensis (hort. ex Lem.) Lem. ex Boynton | ANHU |
| Japanese thimbleweed | Anemone hupehensis (hort. ex Lem.) Lem. ex Boynton var. japonica (Thunb.) Bowles & W. Stern | ANHUJ |
| Jones's columbine | Aquilegia jonesii Parry | AQJO |
| Jones's columbine | Aquilegia jonesii Parry var. jonesii | AQJOJ |
| Kamchatka aconite | Aconitum maximum Pallas ex DC. | ACMA4 |
| Kamchatka buttercup | Ranunculus kamchaticus DC. | RAKA |
| Kamchatka globeflower | Trollius riederianus Fisch. & C.A. Mey. | TRRI5 |
| Kern County larkspur | Delphinium purpusii Brandeg. | DEPU |
| Kern larkspur | Delphinium hansenii (Greene) Greene ssp. kernense (A. Davids.) Ewan | DEHAK |
| king of the meadow | Thalictrum pubescens Pursh | THPU2 |
| kittitas larkspur | Delphinium multiplex (Ewan) C.L. Hitchc. | DEMU |
| knight's-spur | Consolida S.F. Gray | CONSO |
| Kumlienia cooleyae | Ranunculus cooleyae Vasey & Rose | RACO2 |
| Kumlienia hystricula | Ranunculus hystriculus Gray | RAHY3 |
| Labrador buttercup | Ranunculus rhomboideus Goldie | RARH |
| Lapland buttercup | Ranunculus lapponicus L. | RALA |
| Laramie columbine | Aquilegia laramiensis A. Nels. | AQLA |
| large buttercup | Ranunculus macranthus Scheele | RAMA3 |
| larkspur | Delphinium L. | DELPH |
| larkspurleaf monkshood | Aconitum delphiniifolium DC. | ACDE2 |
| larkspurleaf monkshood | Aconitum delphiniifolium DC. ssp. chamissonianum (Reichenb.) Hult | ACDEC |
| larkspurleaf monkshood | Aconitum delphiniifolium DC. ssp. delphiniifolium | ACDED3 |
| larkspurleaf monkshood | Aconitum delphiniifolium DC. ssp. paradoxum (Reichenb.) Hult | ACDEP |
| Latin American buttercup | Ranunculus petiolaris Kunth ex DC. | RAPE5 |
| leather flower | Clematis L. | CLEMA |
| lenten-rose | Helleborus orientalis Lam. | HEOR3 |
| lilies-of-the-field | Anemone coronaria L. | ANCO40 |
| Little Belt Mountain thimbleweed | Anemone lithophila Rydb. | ANLI4 |
| little larkspur | Delphinium bicolor Nutt. | DEBI |
| little larkspur | Delphinium bicolor Nutt. ssp. bicolor | DEBIB |
| little larkspur | Delphinium bicolor Nutt. ssp. calcicola Warnock & Vanderhorst | DEBIC |
| little mountain meadow-rue | Thalictrum mirabile Small | THMI4 |
| Little Mountain thimbleweed | Anemone lyallii Britt. | ANLY |
| littleleaf buttercup | Ranunculus abortivus L. | RAAB |
| Lobb's buttercup | Ranunculus lobbii (Hiern.) Gray | RALO |
| long knight's-spur | Consolida tenuissima (Sibthorp & Sm.) So? | COTE19 |
| longbeak buttercup | Ranunculus longirostris Godr. | RALO2 |
| longspur columbine | Aquilegia longissima Gray | AQLO |
| Lori's columbine | Aquilegia loriae Welsh & Atwood | AQLO2 |
| low spearwort | Ranunculus pusillus Poir. | RAPU |
| low spearwort | Ranunculus pusillus Poir. var. angustifolius (Engelm.) L. Benson | RAPUA |
| low spearwort | Ranunculus pusillus Poir. var. pusillus | RAPUP |
| Macoun's buttercup | Ranunculus macounii Britt. | RAMA2 |
| maid of the mist | Thalictrum coriaceum (Britt.) Small | THCO2 |
| Mancos columbine | Aquilegia micrantha Eastw. | AQMI |
| Mancos columbine | Aquilegia micrantha Eastw. var. mancosana Eastw. | AQMIM |
| Mancos columbine | Aquilegia micrantha Eastw. var. micrantha | AQMIM2 |
| margined buttercup | Ranunculus marginatus d'Urv. | RAMA4 |
| margined buttercup | Ranunculus marginatus d'Urv. var. marginatus d'Urv. [excluded] | RAMAM3 |
| margined buttercup | Ranunculus marginatus d'Urv. var. trachycarpus (Fisch. & C.A. Mey.) Arn. | RAMAT |
| marsh marigold | Caltha L. | CALTH |
| Maui buttercup | Ranunculus mauiensis Gray | RAMA5 |
| meadow-rue | Thalictrum L. | THALI2 |
| Menzies's larkspur | Delphinium menziesii DC. | DEME |
| Menzies's larkspur | Delphinium menziesii DC. ssp. menziesii | DEMEM |
| Menzies's larkspur | Delphinium menziesii DC. ssp. pallidum Warnock | DEMEP3 |
| Millboro leather flower | Clematis viticaulis Steele | CLVI8 |
| Mississippi buttercup | Ranunculus laxicaulis (Torr. & Gray) Darby | RALA2 |
| monkshood | Aconitum L. | ACONI |
| Monterey larkspur | Delphinium hutchinsoniae Ewan | DEHU |
| mountain bugbane | Actaea podocarpa DC. | ACPO11 |
| mountain larkspur | Delphinium ramosum Rydb. | DERA |
| mountain marsh larkspur | Delphinium polycladon Eastw. | DEPO |
| mountain meadow-rue | Thalictrum clavatum DC. | THCL |
| mountain sharp buttercup | Ranunculus acriformis Gray var. montanensis (Rydb.) L. Benson | RAACM |
| mountain thimbleweed | Anemone lancifolia Pursh | ANLA |
| mousetail | Myosurus L. | MYOSU |
| Mt. Hood bugbane | Actaea laciniata (S. Wats.) J. Compton | ACLA12 |
| Myosurus apetalus var. borealis | Myosurus aristatus auct. non Benth. [misapplied] | MYAR3 |
| Myosurus apetalus var. borealis | Myosurus minimus L. var. aristatus auct. non (Benth.) Boivin [misapplied] | MYMIA3 |
| Myosurus apetalus var. montanus | Myosurus aristatus Benth. ssp. montanus (Campbell) D.E. Stone ex Mason | MYARM2 |
| Myosurus apetalus var. montanus | Myosurus minimus L. ssp. montanus Campbell | MYMIM2 |
| Myosurus minimus | Myosurus clavicaulis M.E. Peck p.p. | MYCL |
| Myosurus minimus | Myosurus lepturus (Gray) T.J. Howell | MYLE3 |
| Myosurus minimus | Myosurus minimus L. ssp. apus (Greene) Campbell p.p. | MYMIA |
| Myosurus minimus | Myosurus minimus L. ssp. major (Greene) Campbell | MYMIM |
| Myosurus minimus | Myosurus minimus L. var. apus Greene p.p. | MYMIA7 |
| Myosurus minimus | Myosurus minimus L. var. clavicaulis (M.E. Peck) Campbell p.p. | MYMIC3 |
| Myosurus minimus | Myosurus minimus L. var. filiformis Greene | MYMIF2 |
| Myosurus minimus | Myosurus minimus L. var. interior Boivin | MYMII |
| Myosurus minimus | Myosurus minimus L. var. lepturus Gray | MYMIL |
| Myosurus minimus | Myosurus minimus L. var. major (Greene) K.C. Davis | MYMIM7 |
| Myosurus nitidus | Myosurus egglestonii Woot. & Standl. | MYEG2 |
| Myosurus sessilis | Myosurus alopecuroides Greene | MYAL6 |
| Myosurus sessilis | Myosurus clavicaulis M.E. Peck p.p. | MYCL |
| Myosurus sessilis | Myosurus minimus L. ssp. apus (Greene) Campbell p.p. | MYMIA |
| Myosurus sessilis | Myosurus minimus L. var. apus Greene p.p. | MYMIA7 |
| Myosurus sessilis | Myosurus minimus L. var. clavicaulis (M.E. Peck) Campbell p.p. | MYMIC3 |
| Myosurus sessilis | Myosurus minimus L. var. sessiliflorus (Huth) Campbell | MYMIS2 |
| narcissus anemone | Anemone narcissiflora L. | ANNA |
| narcissus anemone | Anemone narcissiflora L. var. monantha DC. | ANNAM2 |
| narcissus anemone | Anemone narcissiflora L. var. villosissima DC. | ANNAV3 |
| narcissus anemone | Anemone narcissiflora L. var. zephyra (A. Nels.) Dutton & Keener | ANNAZ2 |
| Nelson's buttercup | Ranunculus occidentalis Nutt. var. nelsonii (DC.) L. Benson | RAOCN |
| netleaf leather flower | Clematis reticulata Walt. | CLRE |
| Newton's larkspur | Delphinium newtonianum D.M. Moore | DENE2 |
| nigella | Nigella L. | NIGEL |
| nightcaps | Anemone quinquefolia L. var. minima (DC.) Frodin | ANQUM2 |
| nightcaps | Anemone quinquefolia L. var. quinquefolia | ANQUQ |
| northern blue monkshood | Aconitum noveboracense Gray ex Coville | ACNO2 |
| northern buttercup | Ranunculus pedatifidus Sm. var. affinis (R. Br.) L. Benson | RAPEA |
| northern larkspur | Delphinium brachycentrum Ledeb. | DEBR |
| obscure buttercup | Ranunculus triternatus Gray | RATR6 |
| oceanblue larkspur | Delphinium parishii Gray ssp. subglobosum (Wiggins) Lewis & Epling | DEPAS |
| oil shale columbine | Aquilegia barnebyi Munz | AQBA |
| Olympic larkspur | Delphinium glareosum Greene | DEGL |
| Oregon buttercup | Ranunculus oreogenes Greene | RAOR |
| Oregon goldthread | Coptis laciniata Gray | COLA3 |
| Organ Mountain larkspur | Delphinium wootonii Rydb. | DEWO |
| Oriental knight's-spur | Consolida orientalis (J. Gay) Schroedinger | COOR4 |
| Oriental virginsbower | Clematis orientalis L. | CLOR |
| Pacific anemone | Anemone multifida Poir. | ANMU |
| Pacific anemone | Anemone multifida Poir. var. ?hirsuta C.L. Hitchc. | ANMUH |
| Pacific anemone | Anemone multifida Poir. var. multifida Poir. [excluded] | ANMUM3 |
| Pacific anemone | Anemone multifida Poir. var. stylosa (A. Nels.) Dutton & Keener | ANMUS5 |
| Pacific buttercup | Ranunculus pacificus (Hult?n) L. Benson | RAPA |
| pale leather flower | Clematis versicolor Small ex Rydb. | CLVE |
| Pallas's buttercup | Ranunculus pallasii Schlecht. | RAPA2 |
| pallid larkspur | Delphinium parishii Gray ssp. pallidum (Munz) Warnock | DEPAP4 |
| Palmer's leather flower | Clematis palmeri Rose | CLPA |
| Parish's larkspur | Delphinium parishii Gray ssp. parishii | DEPAP3 |
| pasqueflower | Pulsatilla P. Mill. | PULSA |
| peacock larkspur | Delphinium ?pavonaceum Ewan (pro sp.) [menziesii ? trolliifolium] | DEPA4 |
| Pennsylvania buttercup | Ranunculus pensylvanicus L. f. | RAPE2 |
| pheasant's eye | Adonis L. | ADONI |
| piedmont meadow-rue | Thalictrum macrostylum Small & Heller | THMA4 |
| pine forest larkspur | Delphinium gracilentum Greene | DEGR |
| pine hyacinth | Clematis baldwinii Torr. & Gray | CLBA |
| pine hyacinth | Clematis baldwinii Torr. & Gray var. baldwinii | CLBAB |
| pine hyacinth | Clematis baldwinii Torr. & Gray var. latiuscula R.W. Long | CLBAL |
| Pinoche Creek larkspur | Delphinium gypsophilum Ewan | DEGY |
| Pinoche Creek larkspur | Delphinium gypsophilum Ewan ssp. gypsophilum | DEGYG |
| Pinoche Creek larkspur | Delphinium gypsophilum Ewan ssp. parviflorum Lewis & Epling | DEGYP |
| Piper's anemone | Anemone piperi Britt. ex Rydb. | ANPI |
| pipestem clematis | Clematis lasiantha Nutt. | CLLA3 |
| plantainleaf buttercup | Ranunculus alismifolius Geyer ex Benth. | RAAL |
| plantainleaf buttercup | Ranunculus alismifolius Geyer ex Benth. var. alismellus Gray | RAALA |
| plantainleaf buttercup | Ranunculus alismifolius Geyer ex Benth. var. alismifolius | RAALA2 |
| popular buttercup | Ranunculus populago Greene | RAPO |
| Porcupine River thimbleweed | Anemone multiceps (Greene) Standl. | ANMU4 |
| prairie buttercup | Ranunculus platensis Spreng. | RAPL |
| Pulsatilla occidentalis | Anemone occidentalis S. Wats. | ANOC6 |
| Pulsatilla patens ssp. multifida | Anemone ludoviciana Nutt. | ANLU5 |
| Pulsatilla patens ssp. multifida | Anemone multifida (Pritz.) Zamels, non Poir. | ANMU8 |
| Pulsatilla patens ssp. multifida | Anemone nuttalliana DC. | ANNU5 |
| Pulsatilla patens ssp. multifida | Anemone patens L. var. multifida Pritz. | ANPAM |
| Pulsatilla patens ssp. multifida | Anemone patens L. var. nuttalliana (DC.) Gray | ANPAN |
| Pulsatilla patens ssp. multifida | Anemone patens L. var. wolfgangiana (Bess. ex Richards) Trauvtr. & Mey ex F. Kurtz | ANPAW |
| Pulsatilla patens ssp. multifida | Pulsatilla hirsutissima (Pursh) Britt. | PUHI |
| Pulsatilla patens ssp. multifida | Pulsatilla ludoviciana Heller | PULU |
| Pulsatilla patens ssp. multifida | Pulsatilla nuttalliana (DC.) Spreng. | PUNU3 |
| Pulsatilla patens ssp. multifida | Pulsatilla patens (L.) P. Mill. ssp. hirsutissima (Pursh) Zamels | PUPAH2 |
| Pulsatilla patens ssp. patens | Anemone patens L. [excluded] | ANPA19 |
| Pulsatilla vulgaris | Anemone pulsatilla L. | ANPU14 |
| purple meadow-rue | Thalictrum dasycarpum Fisch. & Av?-Lall. | THDA |
| pygmy buttercup | Ranunculus pygmaeus Wahlenb. | RAPY |
| pygmy buttercup | Ranunculus pygmaeus Wahlenb. var. pygmaeus | RAPYP2 |
| Ranunculus abortivus | Ranunculus abortivus L. ssp. acrolasius (Fern.) Kapoor & A.& D. L?ve | RAABA |
| Ranunculus abortivus | Ranunculus abortivus L. var. acrolasius Fern. | RAABA3 |
| Ranunculus abortivus | Ranunculus abortivus L. var. eucyclus Fern. | RAABE |
| Ranunculus abortivus | Ranunculus abortivus L. var. indivisus Fern. | RAABI |
| Ranunculus abortivus | Ranunculus abortivus L. var. typicus Fern. | RAABT |
| Ranunculus acriformis var. acriformis | Ranunculus acriformis Gray var. typicus L. Benson | RAACT |
| Ranunculus acris var. acris | Ranunculus acris L. ssp. strigulosus (Schur) Hyl. | RAACS |
| Ranunculus acris var. acris | Ranunculus acris L. var. latisectus G. Beck | RAACL |
| Ranunculus acris var. acris | Ranunculus acris L. var. stevenii (Andrz. ex Bess.) Lange | RAACS2 |
| Ranunculus acris var. acris | Ranunculus acris L. var. typicus G. Beck | RAACT2 |
| Ranunculus acris var. acris | Ranunculus acris L. var. villosus (Drab.) S.M. Coles | RAACV |
| Ranunculus acris var. acris | Ranunculus boreanus Jord. | RABO3 |
| Ranunculus acris var. frigidus | Ranunculus grandis Honda | RAGR |
| Ranunculus acris var. frigidus | Ranunculus grandis Honda var. austrokurilensis (Tatew.) Hara | RAGRA |
| Ranunculus adoneus var. adoneus | Ranunculus adoneus Gray var. typicus L. Benson | RAADT |
| Ranunculus adoneus var. adoneus | Ranunculus eschscholtzii Schlecht. var. adoneus (Gray) C.L. Hitchc. | RAESA |
| Ranunculus adoneus var. alpinus | Ranunculus eschscholtzii Schlecht. var. alpinus (S. Wats.) C.L. Hitchc. | RAESA2 |
| Ranunculus adoneus var. alpinus | Ranunculus orthorhynchus Hook. var. alpinus S. Wats. | RAORA2 |
| Ranunculus aestivalis | Ranunculus acriformis Gray var. aestivalis L. Benson | RAACA |
| Ranunculus aestivalis | Ranunculus acris L. var. aestivalis (L. Benson) Welsh | RAACA4 |
| Ranunculus alismifolius var. alismifolius | Ranunculus alismifolius Geyer ex Benth. var. hartwegii (Greene) Jepson | RAALH |
| Ranunculus alismifolius var. alismifolius | Ranunculus alismifolius Geyer ex Benth. var. lemmonii (Gray) L. Benson | RAALL |
| Ranunculus alismifolius var. alismifolius | Ranunculus alismifolius Geyer ex Benth. var. typicus L. Benson | RAALT |
| Ranunculus alismifolius var. alismifolius | Ranunculus hartwegii Greene | RAHA3 |
| Ranunculus alismifolius var. alismifolius | Ranunculus lemmonii Gray | RALE |
| Ranunculus ambigens | Ranunculus obtusiusculus Raf. | RAOB |
| Ranunculus andersonii var. andersonii | Beckwithia andersonii (Gray) Jepson | BEAN2 |
| Ranunculus andersonii var. tenellus | Ranunculus andersonii Gray var. juniperinus (M.E. Jones) Welsh | RAANJ |
| Ranunculus andersonii var. tenellus | Ranunculus juniperinus M.E. Jones | RAJU |
| Ranunculus aquatilis | Batrachium aquatile (L.) Dumort. | BAAQ |
| Ranunculus aquatilis | Ranunculus aquatilis L. var. hispidulus E. Drew | RAAQH |
| Ranunculus aquatilis | Ranunculus aquatilis L. var. typicus L. Benson | RAAQT |
| Ranunculus aquatilis | Ranunculus trichophyllus Chaix var. hispidulus (E. Drew) W. Drew | RATRH |
| Ranunculus arizonicus | Ranunculus arizonicus J.G. Lemmon ex Gray var. typicus L. Benson | RAART |
| Ranunculus arvensis | Ranunculus arvensis L. var. tuberculatus (DC.) Koch | RAART2 |
| Ranunculus auricomus | Ranunculus auricomus L. var. glabratus Lynge | RAAUG2 |
| Ranunculus auricomus | Ranunculus auricomus L. var. typicus G. Beck | RAAUT2 |
| Ranunculus bonariensis var. trisepalus | Ranunculus alveolatus Carter | RAAL3 |
| Ranunculus bonariensis var. trisepalus | Ranunculus trisepalus Gillies ex Hook. & Arn. | RATR3 |
| Ranunculus bulbosus | Ranunculus bulbosus L. var. dissectus Barbey | RABUD |
| Ranunculus bulbosus | Ranunculus bulbosus L. var. valdepubens (Jord.) Briq. | RABUV |
| Ranunculus californicus | Ranunculus californicus Benth. var. austromontanus L. Benson | RACAA |
| Ranunculus californicus | Ranunculus californicus Benth. var. cuneatus Greene | RACAC |
| Ranunculus californicus | Ranunculus californicus Benth. var. gratus Jepson | RACAG |
| Ranunculus californicus | Ranunculus californicus Benth. var. rugulosus (Greene) L. Benson | RACAR |
| Ranunculus californicus | Ranunculus californicus Benth. var. typicus L. Benson | RACAT |
| Ranunculus californicus | Ranunculus rugulosus Greene | RARU2 |
| Ranunculus canus | Ranunculus californicus Benth. var. laetus Greene | RACAL3 |
| Ranunculus canus | Ranunculus canus Benth. var. laetus (Greene) L. Benson | RACAL |
| Ranunculus canus | Ranunculus canus Benth. var. ludovicianus (Greene) L. Benson | RACAL2 |
| Ranunculus canus | Ranunculus canus Benth. var. typicus L. Benson | RACAT2 |
| Ranunculus canus | Ranunculus ludovicianus Greene | RALU |
| Ranunculus cardiophyllus | Ranunculus cardiophyllus Hook. var. subsagittatus (Gray) L. Benson | RACAS |
| Ranunculus cardiophyllus | Ranunculus cardiophyllus Hook. var. typicus L. Benson | RACAT3 |
| Ranunculus coloradensis | Ranunculus cardiophyllus Hook. var. coloradensis L. Benson | RACAC2 |
| Ranunculus cymbalaria | Cyrtorhyncha cymbalaria (Pursh) Britt. ssp. alpina (Hook.) A.& D. L?ve | CYCYA |
| Ranunculus cymbalaria | Halerpestes cymbalaria (Pursh) Greene | HACY2 |
| Ranunculus cymbalaria | Halerpestes cymbalaria (Pursh) Greene ssp. saximontana (Fern.) Moldenke | HACYS |
| Ranunculus cymbalaria | Ranunculus cymbalaria Pursh ssp. saximontanus (Fern.) Thorne | RACYS2 |
| Ranunculus cymbalaria | Ranunculus cymbalaria Pursh var. alpinus Hook. | RACYA |
| Ranunculus cymbalaria | Ranunculus cymbalaria Pursh var. saximontanus Fern. | RACYS |
| Ranunculus cymbalaria | Ranunculus cymbalaria Pursh var. typicus L. Benson | RACYT |
| Ranunculus eschscholtzii var. eschscholtzii | Ranunculus eschscholtzii Schlecht. var. typicus L. Benson | RAEST2 |
| Ranunculus eschscholtzii var. eschscholtzii | Ranunculus nivalis L. var. eschscholtzii (Schlecht.) S. Wats. | RANIE |
| Ranunculus eschscholtzii var. oxynotus | Ranunculus oxynotus Gray | RAOX |
| Ranunculus eschscholtzii var. trisectus | Ranunculus trisectus Eastw. | RATR4 |
| Ranunculus eximius | Ranunculus eschscholtzii Schlecht. var. eximius (Greene) L. Benson | RAESE |
| Ranunculus fascicularis | Ranunculus fascicularis Muhl. ex Bigelow var. apricus (Greene) Fern. | RAFAA |
| Ranunculus fascicularis | Ranunculus fascicularis Muhl. ex Bigelow var. typicus L. Benson | RAFAT |
| Ranunculus ficaria var. bulbifera | Ranunculus ficaria L. ssp. bulbifera (Marsden-Jones) Lawalree | RAFIB2 |
| Ranunculus flabellaris | Ranunculus delphiniifolius Torr. ex Eat. | RADE2 |
| Ranunculus flammula var. filiformis | Ranunculus filiformis Michx. | RAFI2 |
| Ranunculus flammula var. filiformis | Ranunculus flammula L. var. reptans (L.) E. Mey. | RAFLR |
| Ranunculus flammula var. filiformis | Ranunculus reptans L. | RARE80 |
| Ranunculus flammula var. filiformis | Ranunculus reptans L. var. filiformis (Michx.) DC. | RAREF |
| Ranunculus flammula var. filiformis | Ranunculus reptans L. var. intermedius (Hook.) Torr. & Gray | RAREI |
| Ranunculus flammula var. flammula | Ranunculus filiformis Michx. var. ovalis Bigelow | RAFIO |
| Ranunculus flammula var. flammula | Ranunculus flammula L. var. angustifolius Wallr. | RAFLA2 |
| Ranunculus flammula var. flammula | Ranunculus flammula L. var. genuinus Buch. | RAFLG |
| Ranunculus flammula var. flammula | Ranunculus flammula L. var. ovalis (Bigelow) L. Benson | RAFLO |
| Ranunculus flammula var. flammula | Ranunculus flammula L. var. samolifolius (Greene) L. Benson | RAFLS |
| Ranunculus flammula var. flammula | Ranunculus reptans L. var. ovalis (Bigelow) Torr. & Gray | RAREO |
| Ranunculus glaberrimus var. ellipticus | Ranunculus ellipticus Greene | RAEL2 |
| Ranunculus glaberrimus var. ellipticus | Ranunculus glaberrimus Hook. var. buddii Boivin | RAGLB |
| Ranunculus glaberrimus var. glaberrimus | Ranunculus glaberrimus Hook. var. typicus L. Benson | RAGLT |
| Ranunculus glacialis var. chamissonis | Beckwithia glacialis (L.) A.& D. L?ve ssp. chamissonis (Schlecht.) A.& D. L?ve | BEGLC |
| Ranunculus glacialis var. chamissonis | Ranunculus chamissonis Schlecht. | RACH |
| Ranunculus glacialis var. chamissonis | Ranunculus glacialis L. ssp. chamissonis (Schlecht.) Hult | RAGLC |
| Ranunculus gmelinii | Ranunculus gmelinii DC. ssp. purshii (Richards.) Hult | RAGMP2 |
| Ranunculus gmelinii | Ranunculus gmelinii DC. var. hookeri (D. Don) L. Benson | RAGMH |
| Ranunculus gmelinii | Ranunculus gmelinii DC. var. limosus (Nutt.) Hara | RAGML |
| Ranunculus gmelinii | Ranunculus gmelinii DC. var. prolificus (Fern.) Hara | RAGMP3 |
| Ranunculus gmelinii | Ranunculus gmelinii DC. var. purshii (Richards.) Hara | RAGMP |
| Ranunculus gmelinii | Ranunculus gmelinii DC. var. terrestris (Ledeb.) L. Benson | RAGMT2 |
| Ranunculus gmelinii | Ranunculus gmelinii DC. var. typicus L. Benson | RAGMT |
| Ranunculus gmelinii | Ranunculus hyperboreus Rottb. var. tuquetilianus Polunin p.p. | RAHYT |
| Ranunculus gmelinii | Ranunculus limosus Nutt. | RALI2 |
| Ranunculus gmelinii | Ranunculus purshii Richards. | RAPU3 |
| Ranunculus harveyi | Ranunculus abortivus L. var. harveyi Gray | RAABH |
| Ranunculus harveyi | Ranunculus harveyi (Gray) Britt. var. pilosus Benke | RAHAP |
| Ranunculus harveyi | Ranunculus harveyi (Gray) Britt. var. typicus L. Benson | RAHAT |
| Ranunculus hederaceus | Batrachium hederaceum (L.) S.F. Gray | BAHE |
| Ranunculus hispidus var. caricetorum | Ranunculus caricetorum Greene | RACA6 |
| Ranunculus hispidus var. caricetorum | Ranunculus septentrionalis Poir. var. caricetorum (Greene) Fern. | RASEC |
| Ranunculus hispidus var. caricetorum | Ranunculus siciformis Mackenzie & Bush ex Rydb. | RASI2 |
| Ranunculus hispidus var. hispidus | Ranunculus hispidus Michx. var. eurylobus L. Benson | RAHIE |
| Ranunculus hispidus var. hispidus | Ranunculus hispidus Michx. var. falsus Fern. | RAHIF |
| Ranunculus hispidus var. hispidus | Ranunculus hispidus Michx. var. greenmanii L. Benson | RAHIG |
| Ranunculus hispidus var. hispidus | Ranunculus hispidus Michx. var. marilandicus (Poir.) L. Benson | RAHIM |
| Ranunculus hispidus var. hispidus | Ranunculus hispidus Michx. var. typicus L. Benson | RAHIT |
| Ranunculus hispidus var. nitidus | Ranunculus carolinianus DC. | RACA5 |
| Ranunculus hispidus var. nitidus | Ranunculus carolinianus DC. var. villicaulis Shinners | RACAV |
| Ranunculus hispidus var. nitidus | Ranunculus nitidus Muhl. ex Ell., non Walt. | RANI3 |
| Ranunculus hispidus var. nitidus | Ranunculus palmatus Ell. | RAPA5 |
| Ranunculus hispidus var. nitidus | Ranunculus septentrionalis Poir. | RASE |
| Ranunculus hispidus var. nitidus | Ranunculus septentrionalis Poir. var. nitidus Chapman | RASEN |
| Ranunculus hispidus var. nitidus | Ranunculus septentrionalis Poir. var. pterocarpus L. Benson | RASEP |
| Ranunculus hydrocharoides var. hydrocharoides | Ranunculus hydrocharoides Gray var. typicus L. Benson | RAHYT2 |
| Ranunculus hydrocharoides var. stolonifer | Ranunculus stolonifer Hemsl. | RAST3 |
| Ranunculus hyperboreus | Ranunculus hyperboreus Rottb. ssp. arnellii Scheutz | RAHYA |
| Ranunculus hyperboreus | Ranunculus hyperboreus Rottb. ssp. intertextus (Greene) Kapoor & A.& D. L?ve | RAHYI |
| Ranunculus hyperboreus | Ranunculus hyperboreus Rottb. var. intertextus (Greene) Boivin | RAHYI2 |
| Ranunculus hyperboreus | Ranunculus hyperboreus Rottb. var. tuquetilianus Polunin p.p. | RAHYT |
| Ranunculus hyperboreus | Ranunculus intertextus Greene | RAIN2 |
| Ranunculus hyperboreus | Ranunculus natans C.A. Mey. var. intertextus (Greene) L. Benson | RANAI |
| Ranunculus inamoenus var. alpeophilus | Ranunculus alpeophilus A. Nels. | RAAL5 |
| Ranunculus inamoenus var. inamoenus | Ranunculus affinis R. Br. var. micropetalus Greene | RAAFM |
| Ranunculus inamoenus var. inamoenus | Ranunculus inamoenus Greene var. typicus L. Benson | RAINT |
| Ranunculus inamoenus var. subaffinis | Ranunculus arizonicus J.G. Lemmon ex Gray var. subaffinis Gray | RAARS |
| Ranunculus inamoenus var. subaffinis | Ranunculus inamoenus Greene ssp. subaffinis (Gray) Taylor & MacBryde | RAINS2 |
| Ranunculus kamchaticus | Oxygraphis glacialis (Fisch.) Bunge | OXGL4 |
| Ranunculus karelinii | Ranunculus gelidus Kar. & Kir. | RAGE |
| Ranunculus karelinii | Ranunculus gelidus Kar. & Kir. ssp. grayi (Britt.) Hult | RAGEG |
| Ranunculus karelinii | Ranunculus gelidus Kar. & Kir. var. shumaginensis Hult | RAGES |
| Ranunculus karelinii | Ranunculus grayi Britt. | RAGR3 |
| Ranunculus lapponicus | Coptidium lapponicum (L.) Gandog. | COLA9 |
| Ranunculus laxicaulis | Ranunculus flammula L. var. laxicaulis Torr. & Gray | RAFLL |
| Ranunculus laxicaulis | Ranunculus laxicaulis (Torr. & Gray) Darby var. mississippiensis (Small) L. Benson | RALAM |
| Ranunculus laxicaulis | Ranunculus mississippiensis Small | RAMI3 |
| Ranunculus laxicaulis | Ranunculus subcordatus E.O. Beal | RASU3 |
| Ranunculus laxicaulis | Ranunculus texensis Engelm. | RATE6 |
| Ranunculus lobbii | Ranunculus aquatilis L. var. lobbii (Hiern.) S. Wats. | RAAQL |
| Ranunculus longirostris | Batrachium circinatum (Sibthorp) Reichenb. | BACI6 |
| Ranunculus longirostris | Batrachium circinatum (Sibthorp) Reichenb. ssp. subrigidum (W. Drew) A.& D. L?ve | BACIS |
| Ranunculus longirostris | Batrachium longirostre (Godr.) F.W. Schultz | BALO2 |
| Ranunculus longirostris | Ranunculus amphibius James | RAAM2 |
| Ranunculus longirostris | Ranunculus aquatilis L. var. diffusus Withering p.p. | RAAQD |
| Ranunculus longirostris | Ranunculus aquatilis L. var. longirostris (Godr.) Lawson | RAAQL2 |
| Ranunculus longirostris | Ranunculus aquatilis L. var. subrigidus (W. Drew) Breitung | RAAQS |
| Ranunculus longirostris | Ranunculus circinatus auct. non Sibthorp [misapplied] | RACI2 |
| Ranunculus longirostris | Ranunculus circinatus Sibthorp var. subrigidus (W. Drew) L. Benson | RACIS |
| Ranunculus longirostris | Ranunculus subrigidus W. Drew | RASU |
| Ranunculus longirostris | Ranunculus usneoides Greene | RAUS |
| Ranunculus macauleyi var. macauleyi | Ranunculus macauleyi Gray var. typicus L. Benson | RAMAT2 |
| Ranunculus macounii | Ranunculus macounii Britt. var. oreganus (Gray) Davis | RAMAO |
| Ranunculus macranthus | Ranunculus fascicularis Muhl. ex Bigelow var. cuneiformis (Small) L. Benson | RAFAC |
| Ranunculus macranthus | Ranunculus macranthus Scheele var. typicus L. Benson | RAMAT3 |
| Ranunculus marginatus var. trachycarpus | Ranunculus trachycarpus Fisch. & C.A. Mey. | RATR5 |
| Ranunculus mauiensis | Ranunculus mauiensis Gray var. longistylus Skottsberg | RAMAL |
| Ranunculus micranthus | Ranunculus micranthus Nutt. var. cymbalistes (Greene) Fern. | RAMIC |
| Ranunculus micranthus | Ranunculus micranthus Nutt. var. delitescens (Greene) Fern. | RAMID |
| Ranunculus natans | Ranunculus natans C.A. Mey. var. typicus L. Benson [excluded] | RANAT2 |
| Ranunculus occidentalis var. nelsonii | Ranunculus nelsonii (DC.) Gray | RANE2 |
| Ranunculus occidentalis var. nelsonii | Ranunculus occidentalis Nutt. ssp. insularis Hult | RAOCI |
| Ranunculus occidentalis var. nelsonii | Ranunculus occidentalis Nutt. ssp. nelsonii (DC.) Hult | RAOCN2 |
| Ranunculus occidentalis var. nelsonii | Ranunculus recurvatus Poir. var. nelsonii DC. | RAREN |
| Ranunculus occidentalis var. occidentalis | Ranunculus eisenii Kellogg | RAEI |
| Ranunculus occidentalis var. occidentalis | Ranunculus howellii Greene | RAHO |
| Ranunculus occidentalis var. occidentalis | Ranunculus occidentalis Nutt. var. dissectus Henderson | RAOCD |
| Ranunculus occidentalis var. occidentalis | Ranunculus occidentalis Nutt. var. eisenii Kellogg | RAOCE |
| Ranunculus occidentalis var. occidentalis | Ranunculus occidentalis Nutt. var. howellii (Greene) Greene | RAOCH |
| Ranunculus occidentalis var. occidentalis | Ranunculus occidentalis Nutt. var. rattanii Gray | RAOCR |
| Ranunculus occidentalis var. occidentalis | Ranunculus occidentalis Nutt. var. typicus L. Benson | RAOCT |
| Ranunculus occidentalis var. occidentalis | Ranunculus occidentalis Nutt. var. ultramontanus Greene | RAOCU |
| Ranunculus orthorhynchus var. bloomeri | Ranunculus bloomeri S. Wats. | RABL |
| Ranunculus orthorhynchus var. orthorhynchus | Ranunculus orthorhynchus Hook. ssp. alaschensis (L. Benson) Hult | RAORA3 |
| Ranunculus orthorhynchus var. orthorhynchus | Ranunculus orthorhynchus Hook. ssp. platyphyllus (Gray) Taylor & MacBryde | RAORP2 |
| Ranunculus orthorhynchus var. orthorhynchus | Ranunculus orthorhynchus Hook. var. alaschensis L. Benson | RAORA |
| Ranunculus orthorhynchus var. orthorhynchus | Ranunculus orthorhynchus Hook. var. hallii Jepson | RAORH |
| Ranunculus orthorhynchus var. orthorhynchus | Ranunculus orthorhynchus Hook. var. platyphyllus Gray | RAORP |
| Ranunculus orthorhynchus var. orthorhynchus | Ranunculus orthorhynchus Hook. var. typicus L. Benson | RAORT |
| Ranunculus pacificus | Ranunculus septentrionalis Poir. ssp. pacificus Hult | RASEP2 |
| Ranunculus pedatifidus var. affinis | Ranunculus affinis R. Br. | RAAF |
| Ranunculus pedatifidus var. affinis | Ranunculus pedatifidus Sm. ssp. affinis (R. Br.) Hult | RAPEA3 |
| Ranunculus pedatifidus var. affinis | Ranunculus pedatifidus Sm. var. leiocarpus (Trautv.) Fern. | RAPEL |
| Ranunculus petiolaris var. arsenei | Ranunculus fasciculatus Sess? & Moci?o | RAFA8 |
| Ranunculus petiolaris var. arsenei | Ranunculus macranthus Scheele var. arsenei L. Benson | RAMAA |
| Ranunculus pusillus var. angustifolius | Ranunculus pusillus Poir. var. trachyspermus Engelm. | RAPUT |
| Ranunculus pusillus var. angustifolius | Ranunculus tener C. Mohr | RATE7 |
| Ranunculus pusillus var. pusillus | Ranunculus lindheimeri Engelm. | RALI3 |
| Ranunculus pusillus var. pusillus | Ranunculus oblongifolius Ell. | RAOB2 |
| Ranunculus pusillus var. pusillus | Ranunculus pusillus Poir. var. lindheimeri (Engelm.) Gray | RAPUL |
| Ranunculus pusillus var. pusillus | Ranunculus pusillus Poir. var. typicus L. Benson | RAPUT2 |
| Ranunculus ranunculinus | Cyrtorhyncha ranunculina Nutt. | CYRA6 |
| Ranunculus recurvatus var. recurvatus | Ranunculus recurvatus Poir. var. adpressipilis Weatherby | RAREA |
| Ranunculus recurvatus var. recurvatus | Ranunculus recurvatus Poir. var. typicus L. Benson | RARET |
| Ranunculus repens | Ranunculus repens L. var. degeneratus Schur | RARED |
| Ranunculus repens | Ranunculus repens L. var. erectus DC. | RAREE |
| Ranunculus repens | Ranunculus repens L. var. glabratus DC. | RAREG |
| Ranunculus repens | Ranunculus repens L. var. linearilobus DC. | RAREL |
| Ranunculus repens | Ranunculus repens L. var. pleniflorus Fern. | RAREP |
| Ranunculus repens | Ranunculus repens L. var. typicus G. Beck | RARET3 |
| Ranunculus repens | Ranunculus repens L. var. villosus Lamotte | RAREV |
| Ranunculus rhomboideus | Ranunculus ovalis Raf. | RAOV2 |
| Ranunculus sabinei | Ranunculus pygmaeus Wahlenb. ssp. sabinei (R. Br.) Hult | RAPYS |
| Ranunculus sardous | Ranunculus parvulus L. | RAPA6 |
| Ranunculus sceleratus var. multifidus | Ranunculus sceleratus L. ssp. multifidus (Nutt.) Hult | RASCM3 |
| Ranunculus sceleratus var. sceleratus | Hecatonia scelerata (L.) Fourr. | HESC9 |
| Ranunculus sceleratus var. sceleratus | Ranunculus sceleratus L. var. typicus L. Benson | RASCT |
| Ranunculus suksdorfii | Ranunculus eschscholtzii Schlecht. var. suksdorfii (Gray) L. Benson | RAESS |
| Ranunculus sulphureus | Ranunculus nivalis L. var. sulphureus (Soland. ex C.J. Phipps) Wahlenb. | RANIS |
| Ranunculus sulphureus | Ranunculus sulphureus Soland. ex C.J. Phipps var. intercedens Hult | RASUI |
| Ranunculus trichophyllus var. eradicatus | Batrachium confervoides Fries | BACO5 |
| Ranunculus trichophyllus var. eradicatus | Ranunculus aquatilis L. var. codyanus Boivin | RAAQC5 |
| Ranunculus trichophyllus var. eradicatus | Ranunculus aquatilis L. var. confervoides (Fries) Lawson | RAAQC4 |
| Ranunculus trichophyllus var. eradicatus | Ranunculus aquatilis L. var. diffusus Withering p.p. | RAAQD |
| Ranunculus trichophyllus var. eradicatus | Ranunculus aquatilis L. var. eradicatus Laestad. | RAAQE2 |
| Ranunculus trichophyllus var. eradicatus | Ranunculus codyanus Boivin | RACO8 |
| Ranunculus trichophyllus var. eradicatus | Ranunculus confervoides (Fries) Fries | RACO9 |
| Ranunculus trichophyllus var. eradicatus | Ranunculus flaccidus Pers. var. confervoides (Fries) Hegi | RAFLC |
| Ranunculus trichophyllus var. eradicatus | Ranunculus trichophyllus Chaix ssp. eradicatus (Laestad.) C.D.K. Cook | RATRE2 |
| Ranunculus trichophyllus var. eradicatus | Ranunculus trichophyllus Chaix ssp. lutulentus (Perrier & Song.) Vierh. | RATRL |
| Ranunculus trichophyllus var. eradicatus | Ranunculus trichophyllus Chaix var. confervoides (Fries) Rikli | RATRC |
| Ranunculus trichophyllus var. trichophyllus | Batrachium flaccidum (Pers.) Rupr. | BAFL2 |
| Ranunculus trichophyllus var. trichophyllus | Batrachium porteri (Britt.) Britt. | BAPO3 |
| Ranunculus trichophyllus var. trichophyllus | Batrachium trichophyllum (Chaix) F.W. Schultz | BATR2 |
| Ranunculus trichophyllus var. trichophyllus | Ranunculus aquatilis L. var. calvescens (W. Drew) L. Benson | RAAQC3 |
| Ranunculus trichophyllus var. trichophyllus | Ranunculus aquatilis L. var. capillaceus (Thuill.) DC. | RAAQC2 |
| Ranunculus trichophyllus var. trichophyllus | Ranunculus aquatilis L. var. diffusus Withering p.p. | RAAQD |
| Ranunculus trichophyllus var. trichophyllus | Ranunculus aquatilis L. var. harrisii L. Benson | RAAQH2 |
| Ranunculus trichophyllus var. trichophyllus | Ranunculus aquatilis L. var. lalondei L. Benson | RAAQL3 |
| Ranunculus trichophyllus var. trichophyllus | Ranunculus aquatilis L. var. porteri (Britt.) L. Benson | RAAQP2 |
| Ranunculus trichophyllus var. trichophyllus | Ranunculus aquatilis L. var. trichophyllus (Chaix) Gray | RAAQT2 |
| Ranunculus trichophyllus var. trichophyllus | Ranunculus flaccidus Pers. | RAFL3 |
| Ranunculus trichophyllus var. trichophyllus | Ranunculus trichophyllus Chaix var. calvescens W. Drew | RATRC2 |
| Ranunculus trichophyllus var. trichophyllus | Ranunculus trichophyllus Chaix var. typicus W. Drew | RATRT2 |
| Ranunculus triternatus | Ranunculus glaberrimus Hook. var. reconditus L. Benson | RAGLR |
| Ranunculus triternatus | Ranunculus reconditus A. Nels. & J.F. Macbr. | RARE5 |
| Ranunculus turneri | Ranunculus occidentalis Nutt. var. turneri (Greene) L. Benson | RAOCT2 |
| Ranunculus uncinatus var. earlei | Ranunculus earlei Greene | RAEA2 |
| Ranunculus uncinatus var. parviflorus | Ranunculus bongardii Greene | RABO2 |
| Ranunculus uncinatus var. parviflorus | Ranunculus occidentalis Nutt. var. parviflorus Torr. | RAOCP |
| Ranunculus uncinatus var. uncinatus | Ranunculus bongardii Greene var. tenellus (Nutt.) Greene | RABOT2 |
| Ranunculus uncinatus var. uncinatus | Ranunculus uncinatus D. Don ex G. Don var. typicus L. Benson | RAUNT |
| red baneberry | Actaea rubra (Ait.) Willd. | ACRU2 |
| red baneberry | Actaea rubra (Ait.) Willd. ssp. arguta (Nutt.) Hult | ACRUA8 |
| red baneberry | Actaea rubra (Ait.) Willd. ssp. rubra | ACRUR2 |
| red columbine | Aquilegia canadensis L. | AQCA |
| red larkspur | Delphinium nudicaule Torr. & Gray | DENU |
| red windflower | Anemone multifida Poir. var. saxicola Boivin | ANMUS |
| Richarson's meadow-rue | Thalictrum sparsiflorum Turcz. ex Fisch. & C.A. Mey. var. richardsonii (Gray) Boivin | THSPR |
| rock buttercup | Ranunculus micranthus Nutt. | RAMI2 |
| rock clematis | Clematis columbiana (Nutt.) Torr. & Gray | CLCO2 |
| rock clematis | Clematis columbiana (Nutt.) Torr. & Gray var. columbiana | CLCOC2 |
| rock clematis | Clematis columbiana (Nutt.) Torr. & Gray var. tenuiloba (Gray) J. Pringle | CLCOT |
| Rocky Mountain blue columbine | Aquilegia saximontana Rydb. | AQSA |
| Rocky Mountain buttercup | Ranunculus macauleyi Gray | RAMA |
| Rocky Mountain buttercup | Ranunculus macauleyi Gray var. macauleyi | RAMAM |
| Rocky Mountain larkspur | Delphinium scopulorum Gray | DESC2 |
| ropevine clematis | Clematis pauciflora Nutt. | CLPA2 |
| roundlobe hepatica | Hepatica nobilis Schreber var. obtusa (Pursh) Steyermark | HENOO |
| royal knight's-spur | Consolida regalis S.F. Gray | CORE2 |
| royal larkspur | Delphinium variegatum Torr. & Gray | DEVA |
| royal larkspur | Delphinium variegatum Torr. & Gray ssp. kinkiense (Munz) Warnock | DEVAK |
| royal larkspur | Delphinium variegatum Torr. & Gray ssp. thornei Munz | DEVAT |
| royal larkspur | Delphinium variegatum Torr. & Gray ssp. variegatum | DEVAV |
| rue anemone | Thalictrum thalictroides (L.) Eames & Boivin | THTH2 |
| Rydberg's golden columbine | Aquilegia chrysantha Gray var. rydbergii Munz | AQCHR |
| Sacramento Valley buttercup | Ranunculus canus Benth. | RACA3 |
| sagebrush buttercup | Ranunculus glaberrimus Hook. | RAGL |
| sagebrush buttercup | Ranunculus glaberrimus Hook. var. glaberrimus | RAGLG |
| San Bernardino larkspur | Delphinium parryi Gray | DEPA2 |
| San Bernardino larkspur | Delphinium parryi Gray ssp. parryi | DEPAP5 |
| San Bernardino larkspur | Delphinium parryi Gray ssp. purpureum (Lewis & Epling) Warnock | DEPAP6 |
| Sanson's anemone | Anemone multifida Poir. var. sansonii Boivin | ANMUS3 |
| Sapello Canyon larkspur | Delphinium sapellonis Cockerell | DESA |
| Sardinian buttercup | Ranunculus sabinei R. Br. | RASA4 |
| satincurls | Clematis catesbyana Pursh | CLCA3 |
| scarlet larkspur | Delphinium cardinale Hook. | DECA2 |
| scarlet leather flower | Clematis texensis Buckl. | CLTE2 |
| Scott's clematis | Clematis hirsutissima Pursh var. scottii (Porter) Erickson | CLHIS |
| seaside larkspur | Delphinium parryi Gray ssp. maritimum (A. Davids.) Warnock | DEPAM2 |
| setterwort | Helleborus foetidus L. | HEFO8 |
| sharpleaf buttercup | Ranunculus acriformis Gray | RAAC2 |
| sharpleaf buttercup | Ranunculus acriformis Gray var. acriformis | RAACA2 |
| sharplobe hepatica | Hepatica nobilis Schreber var. acuta (Pursh) Steyermark | HENOA |
| showy buttercup | Ranunculus acris L. var. acris | RAACA3 |
| Siberian larkspur | Delphinium grandiflorum L. | DEGR80 |
| Sierra columbine | Aquilegia pubescens Coville | AQPU |
| Sierra larkspur | Delphinium glaucum S. Wats. | DEGL3 |
| Sierra Madre larkspur | Delphinium madrense S. Wats. | DEMA5 |
| Siskiyou false rue anemone | Enemion stipitatum (Gray) Drumm. & Hutchinson | ENST |
| slim larkspur | Delphinium depauperatum Nutt. | DEDE2 |
| smallflower buttercup | Ranunculus parviflorus L. | RAPA3 |
| smallflower columbine | Aquilegia brevistyla Hook. | AQBR |
| smallflowered anemone | Anemone parviflora Michx. | ANPA |
| smallflowered anemone | Anemone parviflora Michx. var. grandiflora Ulbr. | ANPAG |
| smallflowered anemone | Anemone parviflora Michx. var. parviflora | ANPAP2 |
| smooth larkspur | Delphinium glaucescens Rydb. | DEGL2 |
| snow buttercup | Ranunculus nivalis L. | RANI |
| snowdrop windflower | Anemone sylvestris L. | ANSY3 |
| southern blue monkshood | Aconitum uncinatum L. | ACUN |
| southern blue monkshood | Aconitum uncinatum L. ssp. muticum (DC.) Hardin | ACUNM |
| southern blue monkshood | Aconitum uncinatum L. ssp. uncinatum | ACUNU |
| southern meadow-rue | Thalictrum debile Buckl. | THDE5 |
| Southern Oregon buttercup | Ranunculus austrooreganus L. Benson | RAAU |
| Spanish fennel | Nigella hispanica L. | NIHI2 |
| spiked larkspur | Delphinium stachydeum (Gray) Tidestrom | DEST |
| spinyfruit buttercup | Ranunculus muricatus L. | RAMU2 |
| spring pheasant's eye | Adonis vernalis L. | ADVE |
| St. Anthony's turnip | Ranunculus bulbosus L. | RABU |
| straightbeak buttercup | Ranunculus orthorhynchus Hook. | RAOR3 |
| straightbeak buttercup | Ranunculus orthorhynchus Hook. var. orthorhynchus | RAORO |
| subalpine larkspur | Delphinium barbeyi (Huth) Huth | DEBA2 |
| Suksdorf's buttercup | Ranunculus suksdorfii Gray | RASU4 |
| sulphur buttercup | Ranunculus sulphureus Soland. ex C.J. Phipps | RASU2 |
| sulphur marsh marigold | Caltha leptosepala DC. ssp. leptosepala var. sulfurea C.L. Hitchc. | CALES4 |
| summer pheasant's eye | Adonis aestivalis L. | ADAE |
| surefoot buttercup | Ranunculus pedatifidus Sm. | RAPE |
| surefoot buttercup | Ranunculus pedatifidus Sm. var. pedatifidus Sm. [excluded] | RAPEP4 |
| Sutherland's larkspur | Delphinium sutherlandii Warnock | DESU7 |
| swamp larkspur | Delphinium uliginosum Curran | DEUL |
| swamp leather flower | Clematis crispa L. | CLCR |
| sweet autumn virginsbower | Clematis terniflora DC. | CLTE4 |
| sweet autumn virginsbower | Clematis terniflora DC. var. terniflora | CLTET2 |
| tadpole buttercup | Ranunculus ranunculinus (Nutt.) Rydb. | RARA |
| tall bugbane | Actaea elata (Nutt.) Prantl | ACEL4 |
| tall buttercup | Ranunculus acris L. | RAAC3 |
| tall buttercup | Ranunculus acris L. var. frigidus Regel | RAACF |
| tall larkspur | Delphinium exaltatum Ait. | DEEX |
| tall mountain larkspur | Delphinium scaposum Greene | DESC |
| tall thimbleweed | Anemone virginiana L. | ANVI3 |
| tall thimbleweed | Anemone virginiana L. var. alba (Oakes) Wood | ANVIA2 |
| tall thimbleweed | Anemone virginiana L. var. cylindroidea Boivin | ANVIC |
| tall thimbleweed | Anemone virginiana L. var. virginiana | ANVIV2 |
| tenpetal thimbleweed | Anemone berlandieri Pritz. | ANBE |
| Teton anemone | Anemone tetonensis Porter ex Britt. | ANTE3 |
| Thalictrum alpinum | Thalictrum alpinum L. var. hebetum Boivin | THALH |
| Thalictrum coriaceum | Thalictrum caulophylloides Small | THCA6 |
| Thalictrum coriaceum | Thalictrum steeleanum Boivin | THST3 |
| Thalictrum dasycarpum | Thalictrum dasycarpum Fisch. & Av?-Lall. var. hypoglaucum (Rydb.) Boivin | THDAH2 |
| Thalictrum dasycarpum | Thalictrum hypoglaucum Rydb. | THHY |
| Thalictrum fendleri var. fendleri | Thalictrum fendleri Engelm. ex Gray var. platycarpum Trel. | THFEP |
| Thalictrum fendleri var. polycarpum | Thalictrum polycarpum (Torr.) S. Wats. | THPO |
| Thalictrum hultenii | Thalictrum minus L. ssp. kemense (Fries) Hult | THMIK |
| Thalictrum macrostylum | Thalictrum subrotundum Boivin | THSU2 |
| Thalictrum minus ssp. minus | Thalictrum collinum Wallr. | THCO11 |
| Thalictrum occidentale var. occidentale | Thalictrum breitungii Boivin | THBR4 |
| Thalictrum occidentale var. occidentale | Thalictrum occidentale Gray var. megacarpum (Torr.) St. John | THOCM2 |
| Thalictrum occidentale var. occidentale | Thalictrum occidentale Gray var. palousense St. John | THOCP2 |
| Thalictrum pubescens | Thalictrum perelegans Greene | THPE5 |
| Thalictrum pubescens | Thalictrum polygamum Muhl. ex Spreng. | THPO8 |
| Thalictrum pubescens | Thalictrum polygamum Muhl. ex Spreng. var. hebecarpum Fern. | THPOH |
| Thalictrum pubescens | Thalictrum polygamum Muhl. ex Spreng. var. intermedium Boivin | THPOI |
| Thalictrum pubescens | Thalictrum pubescens Pursh var. hebecarpum (Fern.) Boivin | THPUH |
| Thalictrum pubescens | Thalictrum pubescens Pursh var. hepaticum (Greene) Keener | THPUH2 |
| Thalictrum revolutum | Thalictrum revolutum DC. var. glandulosior Boivin | THREG |
| Thalictrum sparsiflorum var. richardsonii | Thalictrum sparsiflorum Turcz. ex Fisch. & C.A. Mey. ssp. richardsonii (Gray) Cody | THSPR2 |
| Thalictrum sparsiflorum var. saximontanum | Thalictrum sparsiflorum Turcz. ex Fisch. & C.A. Mey. var. nevadense Boivin | THSPN |
| Thalictrum thalictroides | Anemonella thalictroides (L.) Spach | ANTH5 |
| Thalictrum thalictroides | Syndesmon thalictroides (L.) Hoffmgg. ex Britt. | SYTH |
| Thalictrum venulosum | Thalictrum confine Fern. | THCO |
| Thalictrum venulosum | Thalictrum confine Fern. var. columbianum (Rydb.) Boivin | THCOC2 |
| Thalictrum venulosum | Thalictrum confine Fern. var. greeneanum Boivin | THCOG |
| Thalictrum venulosum | Thalictrum occidentale Gray var. columbianum (Rydb.) M.E. Peck | THOCC |
| Thalictrum venulosum | Thalictrum turneri Boivin | THTU |
| Thalictrum venulosum | Thalictrum venulosum Trel. var. confine (Fern.) Boivin | THVEC |
| Thalictrum venulosum | Thalictrum venulosum Trel. var. fissum (Greene) Boivin | THVEF |
| Thalictrum venulosum | Thalictrum venulosum Trel. var. lunellii (Greene) Boivin | THVEL |
| Thalictrum venulosum | Thalictrum venulosum Trel. var. turneri (Boivin) Boivin | THVET |
| thinpetal larkspur | Delphinium lineapetalum Ewan | DELI3 |
| threadleaf crowfoot | Ranunculus trichophyllus Chaix | RATR |
| threadleaf crowfoot | Ranunculus trichophyllus Chaix var. eradicatus (Laestad.) W. Drew | RATRE |
| threadleaf crowfoot | Ranunculus trichophyllus Chaix var. trichophyllus | RATRT |
| threeleaf goldthread | Coptis trifolia (L.) Salisb. | COTR2 |
| threelobe buttercup | Ranunculus trilobus Desf. | RATR2 |
| threesection buttercup | Ranunculus eschscholtzii Schlecht. var. trisectus (Eastw.) L. Benson | RAEST |
| tiny mousetail | Myosurus minimus L. | MYMI2 |
| Tracy's larkspur | Delphinium antoninum Eastw. | DEAN5 |
| trailing white monkshood | Aconitum reclinatum Gray | ACRE |
| Trautvetteria caroliniensis var. occidentalis | Trautvetteria grandis Nutt. | TRGR10 |
| traveler's-joy | Clematis brachiata Thunb. | CLBR5 |
| Trollius laxus ssp. albiflorus | Trollius albiflorus (Gray) Rydb. | TRAL8 |
| Trollius laxus ssp. albiflorus | Trollius laxus Salisb. var. albiflorus Gray | TRLAA |
| tuber anemone | Anemone tuberosa Rydb. | ANTU |
| tuber anemone | Anemone tuberosa Rydb. var. texana Enquist & Crozier | ANTUT |
| tuber anemone | Anemone tuberosa Rydb. var. tuberosa | ANTUT2 |
| tundra buttercup | Ranunculus eximius Greene | RAEX |
| Turner's buttercup | Ranunculus turneri Greene | RATU |
| twoleaf anemone | Anemone quinquefolia L. var. bifolia Farw. | ANQUB2 |
| twolobe larkspur | Delphinium nuttallianum Pritz. ex Walp. | DENU2 |
| twospike larkspur | Delphinium distichum Geyer ex Hook. | DEDI11 |
| umbrella larkspur | Delphinium umbraculorum Lewis & Epling | DEUM |
| unexpected larkspur | Delphinium inopinum (Jepson) Lewis & Epling | DEIN |
| upland larkspur | Delphinium nuttallii Gray | DENU3 |
| upland larkspur | Delphinium nuttallii Gray ssp. nuttallii | DENUN2 |
| upland larkspur | Delphinium nuttallii Gray ssp. ochroleucum (Nutt.) Warnock | DENUO |
| Utah buttercup | Ranunculus jovis A. Nels. | RAJO |
| Utah columbine | Aquilegia scopulorum Tidestrom | AQSC |
| Utah columbine | Aquilegia scopulorum Tidestrom var. calcarea (M.E. Jones) Munz | AQSCC |
| Utah columbine | Aquilegia scopulorum Tidestrom var. scopulorum | AQSCS |
| Van Houtte's columbine | Aquilegia eximia Van Houtte ex Planch. | AQEX |
| vasevine | Clematis viorna L. | CLVI4 |
| veiny meadow-rue | Thalictrum venulosum Trel. | THVE |
| Venus's chariot | Aconitum napellus L. | ACNA |
| vernal pool mousetail | Myosurus sessilis S. Wats. | MYSE2 |
| Virginia whitehair leather flower | Clematis coactilis (Fern.) Keener | CLCO4 |
| Wahatoya Creek larkspur | Delphinium robustum Rydb. | DERO |
| waterfall false buttercup | Kumlienia hystricula (Gray) Greene | KUHY |
| waterplantain buttercup | Ranunculus alismifolius Geyer ex Benth. var. montanus S. Wats. | RAALM |
| waterplantain spearwort | Ranunculus ambigens S. Wats. | RAAM |
| waxyleaf meadow-rue | Thalictrum revolutum DC. | THRE |
| Wenatchee larkspur | Delphinium viridescens Leib. | DEVI2 |
| western blue virginsbower | Clematis occidentalis (Hornem.) DC. | CLOC2 |
| western blue virginsbower | Clematis occidentalis (Hornem.) DC. var. dissecta (C.L. Hitchc.) J. Pringle | CLOCD |
| western blue virginsbower | Clematis occidentalis (Hornem.) DC. var. grosseserrata (Rydb.) J. Pringle | CLOCG |
| western blue virginsbower | Clematis occidentalis (Hornem.) DC. var. occidentalis | CLOCO |
| western bugbane | Trautvetteria caroliniensis (Walt.) Vail var. occidentalis (Gray) C.L. Hitchc. | TRCAO |
| western buttercup | Ranunculus occidentalis Nutt. | RAOC |
| western buttercup | Ranunculus occidentalis Nutt. var. brevistylis Greene | RAOCB |
| western buttercup | Ranunculus occidentalis Nutt. var. occidentalis | RAOCO |
| western columbine | Aquilegia formosa Fisch. ex DC. | AQFO |
| western false rue anemone | Enemion occidentale (Hook. & Arn.) Drumm. & Hutchinson | ENOC |
| western meadow-rue | Thalictrum occidentale Gray | THOC |
| western meadow-rue | Thalictrum occidentale Gray var. occidentale | THOCO2 |
| western mousetail | Myosurus nitidus Eastw. | MYNI |
| western red columbine | Aquilegia elegantula Greene | AQEL |
| western white clematis | Clematis ligusticifolia Nutt. | CLLI2 |
| western white clematis | Clematis ligusticifolia Nutt. var. brevifolia Nutt. | CLLIB |
| western white clematis | Clematis ligusticifolia Nutt. var. ligusticifolia | CLLIL2 |
| wetslope buttercup | Ranunculus verecundus B.L. Robins. ex Piper | RAVE |
| white baneberry | Actaea pachypoda Ell. | ACPA |
| white Colorado columbine | Aquilegia caerulea James var. ochroleuca Hook. | AQCAO |
| white marsh marigold | Caltha leptosepala DC. | CALE4 |
| white marsh marigold | Caltha leptosepala DC. ssp. leptosepala | CALEL7 |
| white marsh marigold | Caltha leptosepala DC. ssp. leptosepala var. leptosepala | CALEL8 |
| White Mountain larkspur | Delphinium novomexicanum Woot. | DENO |
| white pasqueflower | Pulsatilla occidentalis (S. Wats.) Freyn | PUOC |
| white water crowfoot | Ranunculus aquatilis L. | RAAQ |
| whitehair leather flower | Clematis albicoma Wherry | CLAL |
| whiteleaf leather flower | Clematis glaucophylla Small | CLGL |
| Willamette false rue anemone | Enemion hallii (Gray) Drumm. & Hutchinson | ENHA |
| winter aconite | Eranthis hyemalis (L.) Salisb. | ERHY4 |
| wolfsbane | Aconitum vulparia Reichb. ex Sprengel | ACVU2 |
| wood anemone | Anemone quinquefolia L. | ANQU |
| woodland buttercup | Ranunculus uncinatus D. Don ex G. Don | RAUN |
| woodland buttercup | Ranunculus uncinatus D. Don ex G. Don var. uncinatus | RAUNU |
| Wright's meadow-rue | Thalictrum fendleri Engelm. ex Gray var. wrightii (Gray) Trel. | THFEW |
| yellow columbine | Aquilegia flavescens S. Wats. | AQFL |
| yellow columbine | Aquilegia flavescens S. Wats. var. flavescens | AQFLF |
| yellow columbine | Aquilegia flavescens S. Wats. var. miniata A. Nels. & J.F. Macbr. | AQFLM |
| yellow columbine | Aquilegia flavescens S. Wats. var. rubicunda (Tidestrom) Welsh | AQFLR |
| yellow larkspur | Delphinium luteum Heller | DELU |
| yellow marsh marigold | Caltha palustris L. | CAPA5 |
| yellow marsh marigold | Caltha palustris L. var. palustris | CAPAP6 |
| yellow marsh marigold | Caltha palustris L. var. radicans (J.R. Forst.) Beck | CAPAR3 |
| yellow monkshood | Aconitum anthora L. | ACAN8 |
| yellow thimbleweed | Anemone richardsonii Hook. | ANRI |
| yellow water buttercup | Ranunculus flabellaris Raf. | RAFL |
| yellow white larkspur | Delphinium xantholeucum Piper | DEXA |
| yellowroot | Xanthorhiza Marsh. | XANTH5 |
| yellowroot | Xanthorhiza simplicissima Marsh. | XASI |
| zalil | Delphinium zalil Aitch. & Hemsley | DEZA2 |
| zigzag larkspur | Delphinium patens Benth. | DEPA3 |
| zigzag larkspur | Delphinium patens Benth. ssp. hepaticoideum Ewan | DEPAH |
| zigzag larkspur | Delphinium patens Benth. ssp. montanum (Munz) Ewan | DEPAM |
| zigzag larkspur | Delphinium patens Benth. ssp. patens | DEPAP7 |
Plant Names