| Common Name | Scientific Name | Code |
| n/a | Campanula alliariifolia Willd. | CAAL34 |
| n/a | Campanula aucheri A. DC. | CAAU21 |
| n/a | Campanula carnica Schied. ex Mert. & Koch [excluded] | CACA102 |
| n/a | Campanula cochlearifolia Lam. [excluded] | CACO83 |
| n/a | Canarina abyssinica Engl. | CAAB14 |
| n/a | Clermontia ?leptoclada Rock (pro sp.) [drepanomorpha ? kohalae] | CLLE3 |
| n/a | Clermontia arborescens (Mann) Hbd. ssp. waikoluensis (St. John) Lammers | CLARW2 |
| n/a | Clermontia grandiflora Gaud. ssp. maxima Lammers | CLGRM2 |
| n/a | Clermontia peleana Rock var. singuliflora (Rock) Lammers | CLPES2 |
| n/a | Codonopsis Wall. | CODON |
| n/a | Cyanea lobata Mann ssp. baldwinii (Forbes & Munro) Lammers | CYLOB |
| n/a | Delissea niihauensis St. John | DENI |
| n/a | Lobelia ?rogersii Bowden [brevifolia ? puberula] | LORO5 |
| n/a | Lobelia ?speciosa Sweet (pro sp.) var. occidentalis Bowden (pro nm.) | LOSPO |
| n/a | Lobelia ?speciosa Sweet (pro sp.) var. schneckii Bowden (pro nm.) | LOSPS2 |
| n/a | Lobelia ?speciosa Sweet (pro sp.) var. speciosa | LOSPS3 |
| n/a | Lobelia ?speciosa Sweet (pro sp.) [cardinalis ? siphilitica] | LOSP2 |
| n/a | Lobelia gruina Cav. [excluded] | LOGR12 |
| 'aku | Cyanea angustifolia (Cham.) Hbd. | CYAN6 |
| 'aku 'aku | Cyanea tritomantha Gray | CYTR6 |
| 'oha kepau | Clermontia hawaiiensis (Hbd.) Rock | CLHA4 |
| 'oha wai nui | Clermontia arborescens (Mann) Hbd. | CLAR4 |
| 'oha wai nui | Clermontia arborescens (Mann) Hbd. ssp. arborescens | CLARA |
| 'oha wai nui | Clermontia arborescens (Mann) Hbd. ssp. waihiae (Wawra) Lammers | CLARW |
| Adriatic bellflower | Campanula garganica Ten. | CAGA9 |
| alakai swamp lobelia | Lobelia villosa (Rock) St. John & Hosaka | LOVI3 |
| American bellflower | Campanulastrum americanum (L.) Small | CAAM18 |
| Apache lobelia | Lobelia anatina F. Wimmer | LOAN |
| arctic bellflower | Campanula uniflora L. | CAUN2 |
| Asyneuma prenanthoides | Campanula prenanthoides Dur. | CAPR15 |
| Bach's calicoflower | Downingia bacigalupii Weiler | DOBA |
| balloon-flower | Platycodon grandiflorus (Jacq.) A. DC. | PLGR7 |
| basin bellflower | Campanula reverchonii Gray | CARE3 |
| bats in the belfry | Campanula trachelium L. | CATR4 |
| bay lobelia | Lobelia feayana Gray | LOFE2 |
| bellflower | Campanula L. | CAMPA |
| bellflower | Campanulastrum Small | CAMPA2 |
| bellflower | Codonopsis pilosula (Franch.) Nannf. | COPI8 |
| Berlandier's lobelia | Lobelia berlandieri A. DC. | LOBE3 |
| Berlandier's lobelia | Lobelia berlandieri A. DC. var. berlandieri | LOBEB2 |
| Berlandier's lobelia | Lobelia berlandieri A. DC. var. brachypoda (Gray) McVaugh | LOBEB |
| bluebell bellflower | Campanula rotundifolia L. | CARO2 |
| bluecup | Githopsis Nutt. | GITHO |
| bluntlobe cyanea | Cyanea obtusa (Gray) Hbd. | CYOB4 |
| bog clermontia | Clermontia grandiflora Gaud. | CLGR3 |
| bog clermontia | Clermontia grandiflora Gaud. ssp. grandiflora | CLGRG |
| bog clermontia | Clermontia grandiflora Gaud. ssp. munroi (St. John) Lammers | CLGRM |
| bog lobelia | Lobelia gloria-montis Rock | LOGL4 |
| Boykin's lobelia | Lobelia boykinii Torr. & Gray ex A. DC. | LOBO |
| brighamia | Brighamia Gray | BRIGH |
| Brighamia insignis | Brighamia citrina (Forbes & Lydgate) St. John | BRCI5 |
| Brighamia insignis | Brighamia citrina (Forbes & Lydgate) St. John var. napaliensis St. John | BRCIN |
| Brighamia rockii | Brighamia remyi St. John | BRRE2 |
| cabbage on a stick | Brighamia insignis Gray | BRIN4 |
| calicoflower | Downingia Torr. | DOWNI |
| California harebell | Asyneuma prenanthoides (Dur.) McVaugh | ASPR10 |
| Campanula aparinoides | Campanula aparinoides Pursh var. grandiflora Holz. | CAAPG |
| Campanula aparinoides | Campanula aparinoides Pursh var. uliginosa (Rydb.) Gleason | CAAPU |
| Campanula aparinoides | Campanula uliginosa Rydb. | CAUL3 |
| Campanula carnica | Campanula linifolia Scop. non L. [excluded] | CALI29 |
| Campanula divaricata | Campanula flexuosa Michx. | CAFL19 |
| Campanula floridana | Rotantha floridana (S. Wats. ex Gray) Small | ROFL4 |
| Campanula griffinii | Campanula angustiflora Eastw. var. exilis J.T. Howell | CAANE |
| Campanula lasiocarpa | Campanula lasiocarpa Cham. ssp. latisepala (Hult?n) Hult | CALAL6 |
| Campanula lasiocarpa | Campanula latisepala Hult | CALA49 |
| Campanula lasiocarpa | Campanula latisepala Hult?n var. dubia Hult | CALAD2 |
| Campanula persicifolia | Campanula persicifolia L. var. alba Horton | CAPEA |
| Campanula rapunculoides | Campanula rapunculoides L. var. ucranica (Bess.) K. Koch | CARAU |
| Campanula robinsiae | Rotantha robinsiae (Small) Small | RORO4 |
| Campanula rotundifolia | Campanula alaskana (Gray) W. Wight ex J.P. Anders. | CAAL19 |
| Campanula rotundifolia | Campanula dubia A. DC. | CADU9 |
| Campanula rotundifolia | Campanula gieseckiana Vest ex J.A. Schultes | CAGI15 |
| Campanula rotundifolia | Campanula gieseckiana Vest ex J.A. Schultes ssp. groenlandica (Berlin) B?cher | CAGIG4 |
| Campanula rotundifolia | Campanula gieseckiana Vest ex J.A. Schultes var. arctica (Lange) B?cher | CAGIA2 |
| Campanula rotundifolia | Campanula groenlandica Berlin | CAGR39 |
| Campanula rotundifolia | Campanula heterodoxa Bong. | CAHE15 |
| Campanula rotundifolia | Campanula intercedens Witasek | CAIN28 |
| Campanula rotundifolia | Campanula petiolata A. DC. | CAPE27 |
| Campanula rotundifolia | Campanula rotundifolia L. ssp. groenlandica (Berlin) A.& D. L?ve | CAROG |
| Campanula rotundifolia | Campanula rotundifolia L. ssp. intercedens (Witasek) A.& D. L?ve | CAROI2 |
| Campanula rotundifolia | Campanula rotundifolia L. var. alaskana Gray | CAROA4 |
| Campanula rotundifolia | Campanula rotundifolia L. var. alpina Tuckerman | CAROA5 |
| Campanula rotundifolia | Campanula rotundifolia L. var. arctica Lange | CAROA6 |
| Campanula rotundifolia | Campanula rotundifolia L. var. intercedens (Witasek) Farw. | CAROI |
| Campanula rotundifolia | Campanula rotundifolia L. var. lancifolia Mert. & Koch | CAROL |
| Campanula rotundifolia | Campanula rotundifolia L. var. petiolata (A. DC.) J.K. Henry | CAROP |
| Campanula rotundifolia | Campanula rotundifolia L. var. velutina A. DC. | CAROV |
| Campanula rotundifolia | Campanula sacajaweana M.E. Peck | CASA13 |
| Campanulastrum americanum | Campanula americana L. | CAAM6 |
| Campanulastrum americanum | Campanula americana L. var. illinoensis (Fresen.) Farw. | CAAMI |
| canarina | Canarina L. | CANAR3 |
| Canby's lobelia | Lobelia canbyi Gray | LOCA |
| Canterbury bells | Campanula medium L. | CAME20 |
| cardenala azul | Lobelia cliffortiana L. | LOCL |
| cardinalflower | Lobelia cardinalis L. | LOCA2 |
| Carlson's cyanea | Cyanea hamatiflora Rock ssp. carlsonii (Rock) Lammers | CYHAC |
| cascade calicoflower | Downingia yina Applegate | DOYI |
| Castle Crags bellflower | Campanula shetleri Heckard | CASH3 |
| chaparral bellflower | Campanula exigua Rattan | CAEX3 |
| Chinese lobelia | Lobelia chinensis Lour. | LOCH4 |
| clasping Venus's looking-glass | Triodanis biflora (Ruiz & Pav?n) Greene | TRBI2 |
| clasping Venus's looking-glass | Triodanis perfoliata (L.) Nieuwl. | TRPE4 |
| clermontia | Clermontia Gaud. | CLERM |
| Clermontia ?leptoclada | Clermontia leptoclada Rock var. holopsila F. Wimmer | CLLEH |
| Clermontia ?leptoclada | Clermontia leptoclada Rock var. urceolata Rock | CLLEU |
| Clermontia arborescens ssp. arborescens | Clermontia furcata F. Wimmer | CLFU2 |
| Clermontia arborescens ssp. arborescens | Clermontia mannii St. John | CLMA7 |
| Clermontia arborescens ssp. waikoluensis | Clermontia waikoluensis St. John | CLWA7 |
| Clermontia arborescens ssp. waikoluensis | Delissea fauriei Levl., non St. John | DEFA3 |
| Clermontia calophylla | Clermontia montis-loa Rock var. tenuifolia Skottsberg | CLMOT |
| Clermontia calophylla | Clermontia parviflora Gaud. ex Gray var. grandis Rock | CLPAG |
| Clermontia calophylla | Clermontia parviflora Gaud. ex Gray var. intermedia Skottsberg | CLPAI |
| Clermontia clermontioides ssp. clermontioides | Clermontia caerulea Hbd. | CLCA16 |
| Clermontia clermontioides ssp. clermontioides | Clermontia caerulea Hbd. ssp. brevidens (Skottsberg) St. John | CLCAB2 |
| Clermontia clermontioides ssp. clermontioides | Clermontia caerulea Hbd. var. brevidens Skottsberg | CLCAB |
| Clermontia clermontioides ssp. clermontioides | Clermontia caerulea Hbd. var. degeneri Skottsberg | CLCAD |
| Clermontia clermontioides ssp. clermontioides | Clermontia caerulea Hbd. var. flavescens (F. Wimmer) St. John | CLCAF |
| Clermontia clermontioides ssp. clermontioides | Clermontia caerulea Hbd. var. parvifolia Rock | CLCAP |
| Clermontia clermontioides ssp. clermontioides | Clermontia coerulea Hbd. ssp. brevidens (Skottsberg) St. John [orthographic variant] | CLCOB |
| Clermontia clermontioides ssp. clermontioides | Clermontia coerulea Hbd. var. brevidens Skottsberg [orthographic variant] | CLCOB2 |
| Clermontia clermontioides ssp. clermontioides | Clermontia coerulea Hbd. var. degeneri Skottsberg [orthographic variant] | CLCOD |
| Clermontia clermontioides ssp. clermontioides | Clermontia coerulea Hbd. var. flavescens (F. Wimmer) St. John [orthographic variant] | CLCOF |
| Clermontia clermontioides ssp. clermontioides | Clermontia coerulea Hbd. var. parvifolia Rock [orthographic variant] | CLCOP |
| Clermontia clermontioides ssp. clermontioides | Clermontia coerulea Hbd. [orthographic variant] | CLCO5 |
| Clermontia clermontioides ssp. clermontioides | Clermontia konaensis St. John | CLKO2 |
| Clermontia clermontioides ssp. rockiana | Clermontia caerulea Hbd. var. greenwelliana F. Wimmer | CLCAG |
| Clermontia clermontioides ssp. rockiana | Clermontia coerulea Hbd. var. greenwelliana F. Wimmer [orthographic variant] | CLCOG |
| Clermontia clermontioides ssp. rockiana | Clermontia loyana Rock | CLLO2 |
| Clermontia clermontioides ssp. rockiana | Clermontia rockiana F. Wimmer | CLRO3 |
| Clermontia fauriei | Clermontia clermontioides (Gaud.) Heller var. epiphytica Hochr. | CLCLE |
| Clermontia fauriei | Clermontia clermontioides (Gaud.) Heller var. hirsutiflora Rock | CLCLH |
| Clermontia grandiflora ssp. grandiflora | Clermontia earina St. John | CLEA |
| Clermontia grandiflora ssp. grandiflora | Delissea filigera Wawra | DEFI2 |
| Clermontia grandiflora ssp. munroi | Clermontia forbesii St. John | CLFO |
| Clermontia grandiflora ssp. munroi | Clermontia hirsutinervis St. John | CLHI4 |
| Clermontia grandiflora ssp. munroi | Clermontia molokaiensis St. John | CLMO4 |
| Clermontia grandiflora ssp. munroi | Clermontia munroi St. John | CLMU3 |
| Clermontia grandiflora ssp. munroi | Clermontia reticulata St. John | CLRE3 |
| Clermontia grandiflora ssp. munroi | Clermontia subpetiolata St. John | CLSU3 |
| Clermontia grandiflora ssp. munroi | Clermontia wailauensis St. John | CLWA |
| Clermontia hawaiiensis | Clermontia kohalae Rock var. hiloensis F. Wimmer | CLKOH |
| Clermontia kakeana | Clermontia kakeana Meyen var. orientalis St. John | CLKAO |
| Clermontia kohalae | Clermontia convallis F. Wimmer | CLCO6 |
| Clermontia kohalae | Clermontia kohalae Rock var. robusta Rock | CLKOR |
| Clermontia kohalae | Clermontia paradisia F. Wimmer p.p. | CLPA7 |
| Clermontia lindseyana | Clermontia hawaiiensis (Hbd.) Rock var. grandis Rock | CLHAG |
| Clermontia lindseyana | Clermontia lindseyana Rock var. livida Rock | CLLIL |
| Clermontia oblongifolia ssp. oblongifolia | Clermontia aspera F. Wimmer p.p. | CLAS |
| Clermontia pallida | Clermontia pallida Hbd. var. ramosissima Rock | CLPAR |
| Clermontia parviflora | Clermontia paradisia F. Wimmer p.p. | CLPA7 |
| Clermontia parviflora | Clermontia parviflora Gaud. ex Gray var. umbraticola Skottsberg | CLPAU |
| Clermontia samuelii ssp. hanaensis | Clermontia hanaensis St. John | CLHA3 |
| Clermontia samuelii ssp. samuelii | Clermontia rosacea St. John | CLRO4 |
| Clermontia singuliflora | Clermontia clermontioides (Gaud.) Heller var. barbata (Rock) St. John | CLCLB |
| Clermontia singuliflora | Clermontia peleana Rock ssp. singuliflora (Rock) Lammers | CLPES |
| Clermontia tuberculata | Clermontia tuberculata Forbes var. subtuberculata St. John | CLTUS |
| Clermontia waimeae | Clermontia parviflora Gaud. ex Gray var. calycina Rock | CLPAC |
| Clermontia waimeae | Clermontia waimeae Rock var. longisepala Rock | CLWAL |
| Clermontia waimeae | Clermontia waimeae Rock var. obovata Rock | CLWAO |
| Colorado Venus's looking-glass | Triodanis coloradoensis (Buckl.) McVaugh | TRCO5 |
| combleaf threadplant | Nemacladus pinnatifidus Greene | NEPI |
| common bluecup | Githopsis specularioides Nutt. | GISP3 |
| common threadplant | Nemacladus capillaris Greene | NECA |
| cutleaf delissea | Delissea laciniata Hbd. | DELA4 |
| cyanea | Cyanea Gaud. | CYANE |
| Cyanea ?lindseyana | Cyanea lindseyana Rock var. livida Rock | CYLIL |
| Cyanea acuminata | Cyanea acuminata (Gaud.) Hbd. var. calycina Hosaka | CYACC |
| Cyanea acuminata | Cyanea occultans St. John | CYOC4 |
| Cyanea angustifolia | Cyanea angustifolia (Cham.) Hbd. var. racemosa Hbd. | CYANR |
| Cyanea calycina | Clermontia aspera F. Wimmer p.p. | CLAS |
| Cyanea calycina | Cyanea coronata F. Wimmer | CYCO14 |
| Cyanea calycina | Cyanea lanceolata (Gaud.) Lammers, Givnish & Sytsma ssp. calycina (Cham.) Lammers, Givnish & Sytsma | CYLAC2 |
| Cyanea calycina | Rollandia bidentata St. John | ROBI |
| Cyanea calycina | Rollandia calycina (Cham.) G. Don | ROCA7 |
| Cyanea calycina | Rollandia calycina (Cham.) G. Don var. kaalae (Wawra) F. Wimmer | ROCAK |
| Cyanea calycina | Rollandia lanceolata Gaud. ssp. calycina (Cham.) Lammers | ROLAC |
| Cyanea calycina | Rollandia lanceolata Gaud. var. tomentella (Wawra) F. Wimmer | ROLAT |
| Cyanea calycina | Rollandia waianaeensis St. John | ROWA2 |
| Cyanea copelandii ssp. haleakalaensis | Cyanea haleakalaensis St. John | CYHA5 |
| Cyanea crispa | Rollandia crispa Gaud. | ROCR |
| Cyanea crispa | Rollandia crispa Gaud. var. muricata Rock | ROCRM |
| Cyanea cylindrocalyx | Cyanea grimesiana Gaud. ssp. cylindrocalyx (Rock) Lammers | CYGRC2 |
| Cyanea cylindrocalyx | Cyanea grimesiana Gaud. var. cylindrocalyx Rock | CYGRC |
| Cyanea dunbariae | Cyanea dunbarii Rock [orthographic variant] | CYDU2 |
| Cyanea eleeleensis | Delissea eleeleensis St. John | DEEL5 |
| Cyanea elliptica | Cyanea angustifolia (Cham.) Hbd. var. hillebrandii Rock | CYANH |
| Cyanea elliptica | Cyanea angustifolia (Cham.) Hbd. var. isabella F. Wimmer | CYANI |
| Cyanea elliptica | Cyanea angustifolia (Cham.) Hbd. var. lanaiensis Rock | CYANL |
| Cyanea elliptica | Cyanea angustifolia (Cham.) Hbd. var. tomentella Hbd. | CYANT |
| Cyanea fauriei | Cyanea coriacea (Gray) Hbd. var. degeneriana F. Wimmer | CYCOD |
| Cyanea fauriei | Cyanea coriacea (Gray) Hbd. var. fauriei (Levl.) F. Wimmer | CYCOF |
| Cyanea fissa ssp. fissa | Cyanea gayana Rock var. wainihaensis Rock | CYGAW |
| Cyanea fissa ssp. gayana | Cyanea gayana Rock | CYGA4 |
| Cyanea fissa ssp. gayana | Cyanea gayana Rock var. duvelii Rock | CYGAD |
| Cyanea fissa ssp. gayana | Cyanea multispicata Levl. | CYMU6 |
| Cyanea floribunda | Cyanea bondiana (Rock) Rock | CYBO2 |
| Cyanea floribunda | Cyanea degeneriana F. Wimmer | CYDE5 |
| Cyanea floribunda | Cyanea densiflora (Rock) Rock | CYDE6 |
| Cyanea glabra | Cyanea holophylla Hbd. var. obovata Rock | CYHOO |
| Cyanea glabra | Cyanea knudsenii Rock var. glabra F. Wimmer | CYKNG |
| Cyanea glabra | Cyanea scabra Hbd. var. variabilis Rock p.p. | CYSCV |
| Cyanea grimesiana ssp. obatae | Cyanea grimesiana Gaud. var. hirsutifolia Rock | CYGRH |
| Cyanea grimesiana ssp. obatae | Cyanea grimesiana Gaud. var. obovata St. John | CYGRO2 |
| Cyanea habenata | Delissea habenata St. John | DEHA6 |
| Cyanea hamatiflora ssp. carlsonii | Cyanea carlsonii Rock | CYCA14 |
| Cyanea hardyi | Cyanea coriacea (Gray) Hbd. var. hardyi (Rock) F. Wimmer | CYCOH |
| Cyanea hirtella | Cyanea chockii Rock | CYCH5 |
| Cyanea hirtella | Cyanea hirtella (Mann) Hbd. var. striata F. Wimmer | CYHIS |
| Cyanea hirtella | Cyanea hirtella (Mann) Hbd. var. subglabra F. Wimmer | CYHIS2 |
| Cyanea humboldtiana | Rollandia humboldtiana Gaud. | ROHU2 |
| Cyanea kahiliensis | Cyanea spathulata (Hbd.) Heller ssp. longipetiolata Lammers | CYSPL |
| Cyanea kolekoleensis | Delissea kolekoleensis St. John | DEKO2 |
| Cyanea koolauensis | Rollandia angustifolia (Hbd.) Rock | ROAN |
| Cyanea koolauensis | Rollandia angustifolia (Hbd.) Rock var. ochreata F. Wimmer | ROANO |
| Cyanea kunthiana | Cyanea bishopii Rock | CYBI5 |
| Cyanea lanceolata | Rollandia degeneriana F. Wimmer p.p. | RODE6 |
| Cyanea lanceolata | Rollandia lanceolata Gaud. | ROLA2 |
| Cyanea lanceolata | Rollandia lanceolata Gaud. var. glaberrima F. Wimmer | ROLAG |
| Cyanea lanceolata | Rollandia lanceolata Gaud. var. kipapaensis Hosaka | ROLAK |
| Cyanea lanceolata | Rollandia lanceolata Gaud. var. rockii St. John & Hosaka | ROLAR |
| Cyanea lanceolata | Rollandia lanceolata Gaud. var. viridiflora Rock | ROLAV |
| Cyanea leptostegia | Cyanea leptostegia Gray var. velutina Skottsberg | CYLEV |
| Cyanea lobata ssp. baldwinii | Cyanea baldwinii Forbes & Munro | CYBA6 |
| Cyanea longiflora | Rollandia degeneriana F. Wimmer p.p. | RODE6 |
| Cyanea longiflora | Rollandia lanceolata Gaud. var. brevipes F. Wimmer | ROLAB |
| Cyanea longiflora | Rollandia longiflora Wawra | ROLO |
| Cyanea longissima | Cyanea scabra Hbd. var. longissima Rock | CYSCL |
| Cyanea longissima | Cyanea scabra Hbd. var. variabilis Rock p.p. | CYSCV |
| Cyanea macrostegia ssp. gibsonii | Cyanea gibsonii Hbd. | CYGI4 |
| Cyanea macrostegia ssp. macrostegia | Cyanea atra Hbd. | CYAT3 |
| Cyanea macrostegia ssp. macrostegia | Cyanea atra Hbd. var. lobata Rock | CYATL |
| Cyanea macrostegia ssp. macrostegia | Cyanea bicolor St. John | CYBI4 |
| Cyanea macrostegia ssp. macrostegia | Cyanea hanaensis St. John | CYHA11 |
| Cyanea macrostegia ssp. macrostegia | Cyanea macrostegia Hbd. var. parvibracteata Rock | CYMAP |
| Cyanea macrostegia ssp. macrostegia | Cyanea macrostegia Hbd. var. viscosa Rock p.p. | CYMAV |
| Cyanea macrostegia ssp. macrostegia | Cyanea mariana F. Wimmer | CYMA13 |
| Cyanea marksii | Cyanea tritomantha Gray var. lydgatei Rock | CYTRL |
| Cyanea mauiensis | Cyanea grimesiana Gaud. var. lydgatei Rock | CYGRL4 |
| Cyanea mauiensis | Cyanea grimesiana Gaud. var. mauiensis Rock | CYGRM |
| Cyanea mauiensis | Cyanea lobata Mann var. hamakuae Rock | CYLOH |
| Cyanea mauiensis | Delissea grimesiana (Gaud.) St. John var. lydgatei (Rock) St. John | DEGRL |
| Cyanea membranacea | Cyanea coriacea (Gray) Hbd. var. serratifolia Rock | CYCOS |
| Cyanea membranacea | Cyanea dentata F. Wimmer | CYDE7 |
| Cyanea munroi | Cyanea grimesiana Gaud. var. munroi Hosaka | CYGRM2 |
| Cyanea parvifolia | Rollandia parvifolia Forbes | ROPA3 |
| Cyanea pilosa ssp. longipedunculata | Cyanea longipedunculata Rock | CYLO6 |
| Cyanea pilosa ssp. pilosa | Cyanea megacarpa (Rock) Rock | CYME8 |
| Cyanea pinnatifida | Rollandia pinnatifida (Cham.) G. Don | ROPI5 |
| Cyanea platyphylla | Cyanea bryanii Rock | CYBR6 |
| Cyanea platyphylla | Cyanea crispohirta F. Wimmer | CYCR5 |
| Cyanea platyphylla | Cyanea fernaldii Rock | CYFE7 |
| Cyanea platyphylla | Cyanea noli-me-tangere Rock | CYNO2 |
| Cyanea platyphylla | Cyanea pulchra Rock | CYPU7 |
| Cyanea platyphylla | Cyanea rollandioides Rock | CYRO7 |
| Cyanea pohaku | Clermontia haleakalensis Rock, non Cyanea haleakalensis St. John | CLHA2 |
| Cyanea purpurellifolia | Rollandia purpurellifolia Rock | ROPU |
| Cyanea pycnocarpa | Cyanea arborea Hbd. var. pycnocarpa Hbd. | CYARP |
| Cyanea recta | Cyanea larrisonii Rock | CYLA9 |
| Cyanea recta | Cyanea rockii F. Wimmer | CYRO6 |
| Cyanea rivularis | Delissea rivularis (Rock) F. Wimmer | DERI4 |
| Cyanea scabra | Cyanea holophylla Hbd. | CYHO5 |
| Cyanea sessilifolia | Rollandia sessilifolia O. Deg. | ROSE4 |
| Cyanea solanacea | Cyanea ferox Hbd. | CYFE8 |
| Cyanea solanacea | Cyanea ferox Hbd. var. laevicalyx Skottsberg | CYFEL |
| Cyanea solanacea | Cyanea scabra Hbd. var. sinuata Rock | CYSCS |
| Cyanea solenocalyx | Cyanea ovatisepala F. Wimmer | CYOV2 |
| Cyanea solenocalyx | Cyanea solenocalyx Hbd. var. latifolia F. Wimmer | CYSOL |
| Cyanea solenocalyx | Cyanea wailauensis Rock | CYWA7 |
| Cyanea st.-johnii | Rollandia st.-johnii Hosaka | ROST2 |
| Cyanea stictophylla | Cyanea nelsonii St. John | CYNE3 |
| Cyanea stictophylla | Cyanea quercifolia (Hbd.) F. Wimmer var. atropurpurea F. Wimmer | CYQUA |
| Cyanea stictophylla | Cyanea stictophylla Rock var. inermis Rock | CYSTI |
| Cyanea superba ssp. regina | Cyanea regina (Wawra) Rock | CYRE9 |
| Cyanea superba ssp. superba | Cyanea superba (Cham.) Gray var. velutina Rock | CYSUV |
| Cyanea sylvestris | Cyanea knudsenii Rock | CYKN2 |
| Cyanea sylvestris | Cyanea sylvestris Heller var. eriantha (Skottsberg) F. Wimmer | CYSYE |
| Cyanea tritomantha | Cyanea magnifica F. Wimmer | CYMA11 |
| Cyanea tritomantha | Cyanea submuricata F. Wimmer | CYSU7 |
| Cyanea truncata | Cyanea truncata (Rock) Rock var. juddii (Forbes) St. John | CYTRJ |
| Dane's blood | Campanula glomerata L. | CAGL2 |
| Degener's cyanea | Cyanea floribunda F. Wimmer | CYFL4 |
| delissea | Delissea Gaud. | DELIS |
| Delissea lanaiensis | Delissea sinuata Hbd. ssp. lanaiensis (Rock) Lammers | DESIL2 |
| Delissea lanaiensis | Delissea sinuata Hbd. var. lanaiensis Rock | DESIL |
| Delissea lauliiana | Delissea laciniata Hbd. var. parviflora Rock | DELAP |
| Delissea niihauensis ssp. kauaiensis | Delissea undulata Gaud. ssp. kauaiensis Lammers | DEUNK |
| Delissea niihauensis ssp. niihauensis | Delissea undulata Gaud. ssp. niihauensis (St. John) Lammers | DEUNN |
| Delissea subcordata | Delissea subcordata Gaud. var. kauaiensis St. John | DESUK |
| Delissea subcordata | Delissea subcordata Gaud. var. obtusifolia Wawra | DESUO |
| Delissea subcordata | Delissea subcordata Gaud. var. waikaneensis St. John | DESUW |
| Delissea subcordata | Delissea subcordata Gaud. var. waralaeensis St. John | DESUW2 |
| Delissea undulata | Delissea argutidentata F. Wimmer | DEAR3 |
| Delissea undulata | Delissea konaensis St. John | DEKO |
| Delissea undulata | Delissea undulata Gaud. ssp. undulata Gaud. [superfluous autonym] | DEUNU |
| Delissea undulata | Delissea undulata Gaud. var. argutidentata (F. Wimmer) F. Wimmer | DEUNA |
| desert threadplant | Nemacladus rubescens Greene | NERU |
| desert threadplant | Nemacladus rubescens Greene var. rubescens | NERUR |
| desert threadplant | Nemacladus rubescens Greene var. tenuis McVaugh | NERUT |
| Dortmann's cardinalflower | Lobelia dortmanna L. | LODO |
| doublehorn calicoflower | Downingia bicornuta Gray | DOBI |
| doublehorn calicoflower | Downingia bicornuta Gray var. bicornuta | DOBIB |
| doublehorn calicoflower | Downingia bicornuta Gray var. picta Hoover | DOBIP |
| Downingia concolor var. brevior | Downingia concolor Greene ssp. brevior (McVaugh) Beauchamp | DOCOB3 |
| Downingia elegans var. elegans | Downingia elegans (Dougl. ex Lindl.) Torr. var. corymbosa (A. DC.) Gray | DOELC |
| Downingia pusilla | Downingia humilis (Greene) Greene | DOHU3 |
| Downingia yina | Downingia willamettensis M.E. Peck | DOWI |
| Downingia yina | Downingia yina Applegate var. major McVaugh | DOYIM |
| downy lobelia | Lobelia puberula Michx. | LOPU |
| downy lobelia | Lobelia puberula Michx. var. mineolana F. Wimmer | LOPUM |
| downy lobelia | Lobelia puberula Michx. var. pauciflora Bush | LOPUP |
| downy lobelia | Lobelia puberula Michx. var. puberula | LOPUP2 |
| downy lobelia | Lobelia puberula Michx. var. simulans Fern. | LOPUS |
| Dunn's lobelia | Lobelia dunnii Greene | LODU |
| Dunn's lobelia | Lobelia dunnii Greene var. dunnii | LODUD4 |
| Dunn's lobelia | Lobelia dunnii Greene var. serrata (Gray) McVaugh | LODUS2 |
| dwarf calicoflower | Downingia pusilla (G. Don) Torr. | DOPU3 |
| Eastwood's bellflower | Campanula angustiflora Eastw. | CAAN3 |
| edging lobelia | Lobelia erinus L. | LOER |
| eleele cyanea | Cyanea eleeleensis (St. John) Lammers | CYEL8 |
| elegant calicoflower | Downingia elegans (Dougl. ex Lindl.) Torr. | DOEL |
| elegant calicoflower | Downingia elegans (Dougl. ex Lindl.) Torr. var. brachypetala (Gandog.) McVaugh | DOELB |
| elegant calicoflower | Downingia elegans (Dougl. ex Lindl.) Torr. var. elegans | DOELE |
| ellipticleaf cyanea | Cyanea elliptica (Rock) Lammers | CYEL5 |
| European bellflower | Campanula bononiensis L. | CABO8 |
| European Venus's looking glass | Legousia speculum-veneris (L.) Fisch. ex A. DC. | LESP2 |
| false lobelia | Trematolobelia Zahlbr. ex Rock | TREMA2 |
| false Venus's looking glass | Legenere limosa (Greene) McVaugh | LELI |
| false Venus's looking glass | Legenere McVaugh | LEGEN |
| Faurie's cyanea | Cyanea fauriei Levl. | CYFA5 |
| flatface calicoflower | Downingia pulchella (Lindl.) Torr. | DOPU2 |
| fleshy porterella | Porterella carnosula (Hook. & Arn.) Torr. | POCA15 |
| Florida bellflower | Campanula floridana S. Wats. ex Gray | CAFL18 |
| Florida lobelia | Lobelia floridana Chapman | LOFL3 |
| foldear lobelia | Lobelia flaccidifolia Small | LOFL2 |
| folded calicoflower | Downingia ornatissima Greene | DOOR |
| folded calicoflower | Downingia ornatissima Greene var. eximia (Hoover) McVaugh | DOORE |
| folded calicoflower | Downingia ornatissima Greene var. ornatissima | DOORO |
| forest clermontia | Clermontia kakeana Meyen | CLKA |
| fringeleaf lobelia | Lobelia fenestralis Cav. | LOFE |
| gadellia | Gadellia Schulkina | GADEL |
| Gadellia lactiflora | Campanula lactiflora Bieb. | CALA42 |
| Gattinger's lobelia | Lobelia appendiculata A. DC. var. gattingeri (Gray) McVaugh | LOAPG |
| giant bellflower | Campanula latifolia L. | CALA40 |
| giant kokee cyanea | Cyanea leptostegia Gray | CYLE5 |
| Gibson's cyanea | Cyanea macrostegia Hbd. ssp. gibsonii (Hbd.) Lammers | CYMAG |
| gingerleaf cyanea | Cyanea asarifolia St. John | CYAS |
| Githopsis diffusa ssp. candida | Githopsis specularioides Nutt. ssp. candida Ewan | GISPC |
| Githopsis diffusa ssp. diffusa | Githopsis gilioides Ewan | GIGI |
| Githopsis diffusa ssp. filicaulis | Githopsis filicaulis Ewan | GIFI3 |
| Githopsis pulchella ssp. pulchella var. glabra | Githopsis specularioides Nutt. var. glabra Jepson | GISPG3 |
| Githopsis specularioides | Githopsis calycina Benth. | GICA7 |
| Githopsis specularioides | Githopsis calycina Benth. var. hirsuta Benth. | GICAH |
| Githopsis specularioides | Githopsis specularioides Nutt. var. hirsuta Nutt. | GISPH |
| glade lobelia | Lobelia glandulosa Walt. | LOGL |
| glandular threadplant | Nemacladus glanduliferus Jepson | NEGL |
| glandular threadplant | Nemacladus glanduliferus Jepson var. glanduliferus | NEGLG |
| glandular threadplant | Nemacladus glanduliferus Jepson var. orientalis McVaugh | NEGLO |
| grayleaf lobelia | Lobelia remyi Rock | LORE3 |
| Great Basin calicoflower | Downingia laeta (Greene) Greene | DOLA2 |
| great blue lobelia | Lobelia siphilitica L. | LOSI |
| great blue lobelia | Lobelia siphilitica L. var. ludoviciana A. DC. | LOSIL |
| great blue lobelia | Lobelia siphilitica L. var. siphilitica | LOSIS2 |
| green-flower clermontia | Clermontia singuliflora (Rock) Rock | CLSI3 |
| Griffin's bellflower | Campanula griffinii Morin | CAGR26 |
| haha'aiakamanu | Clermontia fauriei Levl. | CLFA |
| hairy cyanea | Cyanea pilosa Gray | CYPI4 |
| hairy cyanea | Cyanea pilosa Gray ssp. longipedunculata (Rock) Lammers | CYPIL |
| hairy cyanea | Cyanea pilosa Gray ssp. pilosa | CYPIP |
| hairyflower bellflower | Campanula chamissonis Fedorov | CACH |
| Haleakala clermontia | Clermontia tuberculata Forbes | CLTU2 |
| Haleakala cyanea | Cyanea aculeatiflora Rock | CYAC4 |
| Haleakala lobelia | Lobelia grayana F. Wimmer | LOGR5 |
| Hamakua clermontia | Clermontia pyrularia Hbd. | CLPY2 |
| Hana clermontia | Clermontia samuelii Forbes | CLSA5 |
| Hana clermontia | Clermontia samuelii Forbes ssp. hanaensis (St. John) Lammers | CLSAH2 |
| Hana clermontia | Clermontia samuelii Forbes ssp. samuelii | CLSAS |
| harebell | Asyneuma Griseb. & Schenk | ASYNE |
| harlequin calicoflower | Downingia insignis Greene | DOIN |
| harsh cyanea | Cyanea scabra Hbd. | CYSC7 |
| Hawai'i delissea | Delissea fallax Hbd. | DEFA |
| heterocodon | Heterocodon Nutt. | HETER2 |
| Heterocodon rariflorum | Specularia rariflora (Nutt.) McVaugh | SPRA |
| hillside clermontia | Clermontia lindseyana Rock | CLLI3 |
| hippobroma | Hippobroma G. Don | HIPPO3 |
| Hippobroma longiflora | Isotoma longiflora (L.) K. Presl | ISLO3 |
| Hippobroma longiflora | Laurentia longiflora (L.) Peterm. | LALO2 |
| Holzinger's Venus's looking-glass | Triodanis holzingeri McVaugh | TRHO2 |
| Honolulu cyanea | Cyanea acuminata (Gaud.) Hbd. | CYAC5 |
| Hoover's calicoflower | Downingia bella Hoover | DOBE |
| howellia | Howellia Gray | HOWEL |
| Idaho bellflower | Campanula parryi Gray var. idahoensis McVaugh | CAPAI2 |
| Indian-tobacco | Lobelia inflata L. | LOIN |
| jasione | Jasione L. | JASIO |
| Kaiholena cyanea | Cyanea stictophylla Rock | CYST5 |
| Kauai clermontia | Clermontia clermontioides (Gaud.) Heller | CLCL |
| Kauai clermontia | Clermontia clermontioides (Gaud.) Heller ssp. clermontioides | CLCLC |
| Kauai clermontia | Clermontia clermontioides (Gaud.) Heller ssp. rockiana (F. Wimmer) Lammers | CLCLR |
| Kauai cyanea | Cyanea fissa (Mann) Hbd. | CYFI6 |
| Kauai cyanea | Cyanea fissa (Mann) Hbd. ssp. fissa | CYFIF |
| Kauai cyanea | Cyanea fissa (Mann) Hbd. ssp. gayana (Rock) Lammers | CYFIG |
| Kauai delissea | Delissea rhytidosperma Mann | DERH2 |
| Kauai false lobelia | Trematolobelia kauaiensis (Rock) Skottsberg | TRKA2 |
| Kealia cyanea | Cyanea recta (Wawra) Hbd. | CYRE8 |
| Kilauea Mauna cyanea | Cyanea giffardii Rock | CYGI5 |
| Kohala Mountain clermontia | Clermontia drepanomorpha Rock | CLDR2 |
| kolekole cyanea | Cyanea kolekoleensis (St. John) Lammers | CYKO3 |
| koli'i | Trematolobelia macrostachys (Hook. & Arn.) Zahlbr. | TRMA8 |
| Koloa clermontia | Clermontia ?carinifera Levl. | CLCA6 |
| Koolau Range delissea | Delissea subcordata Gaud. | DESU |
| Koolau Range lobelia | Lobelia gaudichaudii A. DC. | LOGA |
| Koolau Range lobelia | Lobelia gaudichaudii A. DC. ssp. gaudichaudii | LOGAG2 |
| Koolau Range lobelia | Lobelia gaudichaudii A. DC. ssp. koolauensis (Hosaka & Fosberg) Lammers | LOGAK3 |
| Koolau Range rollandia | Cyanea crispa (Gaud.) Lammers, Givnish & Sytsma | CYCR9 |
| kuhi'aikamo'owahie | Lobelia hypoleuca Hbd. | LOHY |
| Kunth's cyanea | Cyanea kunthiana (Gaud.) Hbd. | CYKU |
| Lanai delissea | Delissea lanaiensis (Rock) Lammers | DELA11 |
| lanceleaf cyanea | Cyanea lanceolata (Gaud.) Lammers, Givnish & Sytsma | CYLA12 |
| largeflower false lobelia | Trematolobelia grandifolia (Rock) O. Deg. | TRGR8 |
| lava clermontia | Clermontia calophylla F. Wimmer | CLCA5 |
| lava lobelia | Lobelia kauaensis (Gray) Heller | LOKA2 |
| lavaslope false lobelia | Trematolobelia singularis St. John | TRSI5 |
| leatherleaf cyanea | Cyanea coriacea (Gray) Hbd. | CYCO13 |
| leechleaf cyanea | Cyanea undulata Forbes | CYUN5 |
| leechleaf delissea | Delissea niihauensis St. John ssp. kauaiensis (Lammers) Lammers | DENIK |
| leechleaf delissea | Delissea undulata Gaud. | DEUN2 |
| legousia | Legousia Dur. | LEGOU |
| Legousia speculum-veneris | Githopsis latifolia Eastw. | GILA4 |
| Legousia speculum-veneris | Specularia speculum-veneris (L.) Tanfani | SPSP4 |
| Limahuli Valley cyanea | Cyanea kuhihewa Lammers | CYKU3 |
| Lindsey's cyanea | Cyanea ?lindseyana Rock | CYLI6 |
| linearleaf cyanea | Cyanea linearifolia Rock | CYLI7 |
| lobelia | Lobelia L. | LOBEL |
| Lobelia amoena var. glandulifera | Lobelia georgiana McVaugh | LOGE3 |
| Lobelia amoena var. glandulifera | Lobelia glandulifera (Gray) Small | LOGL5 |
| Lobelia appendiculata var. gattingeri | Lobelia gattingeri Gray | LOGA3 |
| Lobelia berlandieri var. brachypoda | Lobelia brachypoda (Gray) A. DC. ex Small | LOBR4 |
| Lobelia cardinalis | Lobelia cardinalis L. ssp. graminea (Lam.) McVaugh | LOCAG2 |
| Lobelia cardinalis | Lobelia cardinalis L. var. graminea (Lam.) McVaugh | LOCAG5 |
| Lobelia cardinalis | Lobelia cardinalis L. var. meridionalis Bowden | LOCAM3 |
| Lobelia cardinalis | Lobelia cardinalis L. var. multiflora (Paxton) McVaugh | LOCAM |
| Lobelia cardinalis | Lobelia cardinalis L. var. phyllostachya (Engelm.) McVaugh | LOCAP5 |
| Lobelia cardinalis | Lobelia cardinalis L. var. propinqua (Paxton) Bowden | LOCAP6 |
| Lobelia cardinalis | Lobelia cardinalis L. var. pseudosplendens McVaugh | LOCAP4 |
| Lobelia cardinalis | Lobelia fulgens Humb. & Bonpl. ex Willd. | LOFU |
| Lobelia cardinalis | Lobelia splendens Humb. & Bonpl. ex Willd. | LOSP3 |
| Lobelia dunbarii ssp. paniculata | Lobelia costata F. Wimmer | LOCO7 |
| Lobelia dunbarii ssp. paniculata | Lobelia hillebrandii Rock var. paniculata Rock | LOHIP |
| Lobelia erinus | Lobelia erinoides L. | LOER5 |
| Lobelia flaccidifolia | Lobelia halei Small | LOHA4 |
| Lobelia gaudichaudii ssp. koolauensis | Lobelia gaudichaudii A. DC. var. koolauensis Hosaka & Fosberg | LOGAK2 |
| Lobelia gloria-montis | Lobelia gaudichaudii A. DC. var. gloria-montis (Rock) St. John & Hosaka | LOGAG |
| Lobelia gloria-montis | Lobelia gaudichaudii A. DC. var. longibracteata Rock | LOGAL |
| Lobelia gloria-montis | Lobelia gloria-montis Rock var. molokaiensis O. Deg. | LOGLM |
| Lobelia hypoleuca | Lobelia hypoleuca Hbd. var. heterocarpa F. Wimmer | LOHYH |
| Lobelia hypoleuca | Lobelia hypoleuca Hbd. var. rockii St. John & Hosaka | LOHYR |
| Lobelia kalmii | Lobelia kalmii L. var. strictiflora Rydb. | LOKAS |
| Lobelia kalmii | Lobelia strictiflora (Rydb.) Lunell | LOST6 |
| Lobelia kauaensis | Lobelia gaudichaudii A. DC. var. kauaensis Gray | LOGAK |
| Lobelia monostachya | Lobelia hillebrandii Rock var. monostachya Rock | LOHIM |
| Lobelia niihauensis | Lobelia niihauensis St. John var. forbesii St. John | LONIF |
| Lobelia niihauensis | Lobelia niihauensis St. John var. meridiana St. John | LONIM |
| Lobelia niihauensis | Lobelia tortuosa Heller | LOTO5 |
| Lobelia niihauensis | Lobelia tortuosa Heller var. haupuensis St. John | LOTOH |
| Lobelia niihauensis | Lobelia tortuosa Heller var. intermedia St. John | LOTOI |
| Lobelia portoricensis | Tupa portoricensis Vatke | TUPO |
| Lobelia puberula var. pauciflora | Lobelia puberula Michx. ssp. pauciflora (Bush) Bowden | LOPUP3 |
| Lobelia puberula var. pauciflora | Lobelia reverchonii B.L. Turner | LORE4 |
| Lobelia robusta var. portoricensis | Lobelia assurgens L. var. portoricensis (A. DC.) Urban | LOASP |
| Lobelia robusta var. robusta | Tupa robusta (Graham) A. DC. [excluded] | TURO2 |
| Lobelia spicata var. hirtella | Lobelia hirtella (Gray) Greene | LOHI5 |
| Lobelia spicata var. leptostachys | Lobelia leptostachys A. DC. | LOLE3 |
| Lobelia spicata var. spicata | Lobelia bracteata Small | LOBR5 |
| Lobelia spicata var. spicata | Lobelia spicata Lam. var. originalis McVaugh | LOSPO2 |
| Lobelia spicata var. spicata | Lobelia spicata Lam. var. parviflora Gray | LOSPP |
| Lobelia vivaldii | Lobelia salicina auct. non Lam. [misapplied] | LOSA4 |
| long-foot cyanea | Cyanea dolichopoda Lammers & Lorence | CYDO3 |
| longflower threadplant | Nemacladus longiflorus Gray | NELO |
| longflower threadplant | Nemacladus longiflorus Gray var. breviflorus McVaugh | NELOB |
| longflower threadplant | Nemacladus longiflorus Gray var. longiflorus | NELOL |
| longleaf lobelia | Lobelia elongata Small | LOEL |
| madamfate | Hippobroma longiflora (L.) G. Don | HILO3 |
| Mann's cyanea | Cyanea mannii (Brigham) Hbd. | CYMA12 |
| manyfruit cyanea | Cyanea pycnocarpa (Hbd.) F. Wimmer | CYPY |
| Mapulehu Valley cyanea | Cyanea profuga Forbes | CYPR9 |
| Marks's cyanea | Cyanea marksii Rock | CYMA14 |
| maroonspot calicoflower | Downingia concolor Greene | DOCO2 |
| maroonspot calicoflower | Downingia concolor Greene var. brevior McVaugh | DOCOB |
| maroonspot calicoflower | Downingia concolor Greene var. concolor | DOCOC |
| maroonspot calicoflower | Downingia concolor Greene var. tricolor (Greene) Jepson | DOCOT |
| marsh bellflower | Campanula aparinoides Pursh | CAAP2 |
| Maui clermontia | Clermontia micrantha (Hbd.) Rock | CLMI3 |
| Maui cyanea | Cyanea comata Hbd. | CYCO11 |
| Maui cyanea | Cyanea mauiensis (Rock) Lammers | CYMA24 |
| Maui lobelia | Lobelia hillebrandii Rock | LOHI4 |
| Mauna Loa clermontia | Clermontia montis-loa Rock | CLMO5 |
| McEldowney's cyanea | Cyanea mceldowneyi Rock | CYMC |
| milky bellflower | Gadellia lactiflora (Bieb.) Schulkina | GALA13 |
| Mojave dwarf | Parishella californica Gray | PACA10 |
| Molokai cyanea | Cyanea procera Hbd. | CYPR8 |
| Molokai ohaha | Brighamia rockii St. John | BRRO |
| mountain harebell | Campanula lasiocarpa Cham. | CALA7 |
| mountain threadplant | Nemacladus montanus Greene | NEMO |
| Mt. Hamilton bellflower | Campanula sharsmithiae Morin | CASH4 |
| Mt. Kaala cyanea | Cyanea superba (Cham.) Gray | CYSU8 |
| Mt. Kaala cyanea | Cyanea superba (Cham.) Gray ssp. regina (Wawra) Lammers | CYSUR |
| Mt. Kaala cyanea | Cyanea superba (Cham.) Gray ssp. superba | CYSUS |
| Munro's cyanea | Cyanea munroi (Hosaka) Lammers | CYMU10 |
| Nemacladus interior | Nemacladus rubescens Greene var. interior (Munz) McVaugh | NERUI |
| Niihau delissea | Delissea niihauensis St. John ssp. niihauensis | DENIN |
| Niihau lobelia | Lobelia niihauensis St. John | LONI |
| Nuttall's lobelia | Lobelia nuttallii J.A. Schultes | LONU |
| O'ahu cyanea | Cyanea calycina (Cham.) Lammers | CYCA23 |
| Oahu clermontia | Clermontia oblongifolia Gaud. | CLOB2 |
| Oahu clermontia | Clermontia oblongifolia Gaud. ssp. brevipes (F. Wimmer) Lammers | CLOBB |
| Oahu clermontia | Clermontia oblongifolia Gaud. ssp. mauiensis (Rock) Lammers | CLOBM |
| Oahu clermontia | Clermontia oblongifolia Gaud. ssp. oblongifolia | CLOBO |
| Oahu cyanea | Cyanea hardyi Rock | CYHA7 |
| Oahu lobelia | Lobelia oahuensis Rock | LOOA |
| Oahu rollandia | Cyanea humboldtiana (Gaud.) Lammers, Givnish & Sytsma | CYHU2 |
| oakleaf cyanea | Cyanea quercifolia (Hbd.) F. Wimmer | CYQU |
| Olympic bellflower | Campanula piperi T.J. Howell | CAPI2 |
| onesided threadplant | Nemacladus secundiflorus G.T. Robbins | NESE |
| Ontario lobelia | Lobelia kalmii L. | LOKA |
| pale bellflower | Campanula scouleri Hook. ex A. DC. | CASC7 |
| pale lobelia | Lobelia appendiculata A. DC. | LOAP |
| pale lobelia | Lobelia appendiculata A. DC. var. appendiculata | LOAPA |
| palespike lobelia | Lobelia spicata Lam. | LOSP |
| palespike lobelia | Lobelia spicata Lam. var. campanulata McVaugh | LOSPC |
| palespike lobelia | Lobelia spicata Lam. var. hirtella Gray | LOSPH |
| palespike lobelia | Lobelia spicata Lam. var. leptostachys (A. DC.) Mackenzie & Bush | LOSPL |
| palespike lobelia | Lobelia spicata Lam. var. scaposa McVaugh | LOSPS |
| palespike lobelia | Lobelia spicata Lam. var. spicata | LOSPS4 |
| palmtree cyanea | Cyanea arborea Hbd. | CYAR10 |
| Palolo Valley rollandia | Cyanea koolauensis Lammers, Givnish & Sytsma | CYKO4 |
| Panaluu Mountain rollandia | Cyanea purpurellifolia (Rock) Lammers, Givnish & Systma | CYPU11 |
| panaunau | Lobelia yuccoides Hbd. | LOYU |
| papery cyanea | Cyanea membranacea Rock | CYME9 |
| parishella | Parishella Gray | PARIS |
| Parry's bellflower | Campanula parryi Gray | CAPA10 |
| Parry's bellflower | Campanula parryi Gray var. parryi | CAPAP2 |
| peachleaf bellflower | Campanula persicifolia L. | CAPE20 |
| pele clermontia | Clermontia peleana Rock | CLPE2 |
| pele clermontia | Clermontia peleana Rock var. peleana | CLPEP4 |
| pineland lobelia | Lobelia homophylla F. Wimmer | LOHO2 |
| plateau delissea | Cyanea rivularis Rock | CYRI4 |
| platycodon | Platycodon A. DC. | PLATY4 |
| Platycodon grandiflorus | Platycodon grandiflorum (Jacq.) A. DC. [orthographic variant] | PLGR5 |
| pohaku cyanea | Cyanea pohaku Lammers | CYPO5 |
| popolo | Cyanea solanacea Hbd. | CYSO |
| porterella | Porterella Torr. | PORTE |
| prairie Venus's looking-glass | Triodanis lamprosperma McVaugh | TRLA10 |
| prickly cyanea | Cyanea horrida (Rock) O. Deg. & Hosaka | CYHO6 |
| pua kala | Cyanea solenocalyx Hbd. | CYSO2 |
| puna cyanea | Cyanea platyphylla (Gray) Hbd. | CYPL7 |
| Punaluu cyanea | Cyanea truncata (Rock) Rock | CYTR7 |
| purple cyanea | Cyanea macrostegia Hbd. | CYMA10 |
| purple cyanea | Cyanea macrostegia Hbd. ssp. macrostegia | CYMAM |
| rampion | Campanula rapunculus L. | CARA19 |
| rampion bellflower | Campanula rapunculoides L. | CARA |
| rareflower heterocodon | Heterocodon rariflorum Nutt. | HERA3 |
| ravine cyanea | Cyanea dunbariae Rock | CYDU3 |
| Remy's cyanea | Cyanea remyi Rock | CYRE10 |
| ridge rollandia | Cyanea longiflora (Wawra) Lammers, Givnish & Systma | CYLO12 |
| Robins's bellflower | Campanula robinsiae Small | CARO15 |
| robust lobelia | Lobelia robusta Graham | LORO4 |
| robust lobelia | Lobelia robusta Graham var. portoricensis (A. DC.) McVaugh | LOROP |
| robust lobelia | Lobelia robusta Graham var. robusta Graham [excluded] | LOROR2 |
| rollandia | Rollandia ambigua G. Don | ROAM5 |
| rollandia | Rollandia Gaud. | ROLLA |
| rough bellflower | Campanula scabrella Engelm. | CASC6 |
| roundleaf lobelia | Lobelia rotundifolia Juss. ex A. DC. | LORO3 |
| rustyleaf cyanea | Cyanea hirtella (Mann) Hbd. | CYHI5 |
| San Gabriel bluecup | Githopsis diffusa Gray | GIDI2 |
| San Gabriel bluecup | Githopsis diffusa Gray ssp. candida (Ewan) Morin | GIDIC |
| San Gabriel bluecup | Githopsis diffusa Gray ssp. diffusa | GIDID |
| San Gabriel bluecup | Githopsis diffusa Gray ssp. filicaulis (Ewan) Morin | GIDIF |
| San Gabriel bluecup | Githopsis diffusa Gray ssp. robusta Morin | GIDIR |
| sessileleaf cyanea | Cyanea sessilifolia (O. Deg.) Lammers | CYSE12 |
| sharktail cyanea | Cyanea pinnatifida (Cham.) F. Wimmer | CYPI5 |
| sheepbit | Jasione montana L. | JAMO |
| Shipman's cyanea | Cyanea shipmanii Rock | CYSH |
| shortleaf lobelia | Lobelia brevifolia Nutt. ex A. DC. | LOBR3 |
| Sierra bluecup | Githopsis pulchella Vatke | GIPU2 |
| Sierra bluecup | Githopsis pulchella Vatke ssp. campestris Morin | GIPUC |
| Sierra bluecup | Githopsis pulchella Vatke ssp. pulchella | GIPUP |
| Sierra bluecup | Githopsis pulchella Vatke ssp. pulchella var. glabra (Jepson) Morin | GIPUG |
| Sierra bluecup | Githopsis pulchella Vatke ssp. pulchella var. pulchella | GIPUP2 |
| Sierra bluecup | Githopsis pulchella Vatke ssp. serpentinicola Morin | GIPUS |
| Sierra calicoflower | Downingia montana Greene | DOMO2 |
| Sierra Madre lobelia | Lobelia laxiflora Kunth | LOLA |
| Sierra Madre lobelia | Lobelia laxiflora Kunth var. angustifolia A. DC. | LOLAA |
| Sierra threadplant | Nemacladus interior (Munz) G.T. Robbins | NEIN |
| sigmoid threadplant | Nemacladus sigmoideus G.T. Robbins | NESI |
| slender threadplant | Nemacladus gracilis Eastw. | NEGR |
| slimpod Venus's looking-glass | Triodanis leptocarpa (Nutt.) Nieuwl. | TRLE3 |
| small bonny bellflower | Campanula divaricata Michx. | CADI3 |
| small-leaf delissea | Delissea lauliiana Lammers | DELA6 |
| smallflower clermontia | Clermontia parviflora Gaud. ex Gray | CLPA8 |
| smallflower delissea | Delissea parviflora Hbd. | DEPA9 |
| smallflower threadplant | Nemacladus ramosissimus Nutt. | NERA |
| smooth cyanea | Cyanea glabra (F. Wimmer) St. John | CYGL5 |
| southern lobelia | Lobelia amoena Michx. | LOAM4 |
| southern lobelia | Lobelia amoena Michx. var. amoena | LOAMA |
| southern lobelia | Lobelia amoena Michx. var. glandulifera Gray | LOAMG |
| southern rockbell | Wahlenbergia marginata (Thunb.) A. DC. | WAMA |
| spleenwort cyanea | Cyanea aspleniifolia (Mann) Hbd. | CYAS2 |
| splitleaf cyanea | Cyanea cylindrocalyx (Rock) Lammers | CYCY7 |
| splitleaf cyanea | Cyanea grimesiana Gaud. | CYGR8 |
| splitleaf cyanea | Cyanea grimesiana Gaud. ssp. grimesiana | CYGRG |
| splitleaf cyanea | Cyanea grimesiana Gaud. ssp. obatae (St. John) Lammers | CYGRO |
| spoonleaf cyanea | Cyanea kahiliensis (St. John) Lammers | CYKA11 |
| spoonleaf cyanea | Cyanea spathulata (Hbd.) Heller | CYSP5 |
| spotted bellflower | Campanula punctata Lam. | CAPU20 |
| spreading bellflower | Campanula patula L. | CAPA44 |
| St. John's rollandia | Cyanea st.-johnii (Hosaka) Lammers, Givnish & Systma | CYST8 |
| stoutstem threadplant | Nemacladus rigidus Curran | NERI |
| stream-bed cyanea | Cyanea habenata (St. John) Lammers | CYHA13 |
| streambank cyanea | Cyanea longissima (Rock) St. John | CYLO7 |
| swamp bellflower | Campanula californica (Kellogg) Heller | CACA7 |
| swampforest clermontia | Clermontia waimeae Rock | CLWA2 |
| Texas Venus's looking-glass | Triodanis texana McVaugh | TRTE4 |
| threadplant | Nemacladus Nutt. | NEMAC2 |
| tibey tupa | Lobelia portoricensis (Vatke) Urban | LOPO |
| toothed calicoflower | Downingia cuspidata (Greene) Greene ex Jepson | DOCU |
| treetrunk cyanea | Cyanea copelandii Rock | CYCO12 |
| treetrunk cyanea | Cyanea copelandii Rock ssp. copelandii | CYCOC |
| treetrunk cyanea | Cyanea copelandii Rock ssp. haleakalaensis (St. John) Lammers | CYCOH2 |
| Trematolobelia grandifolia | Trematolobelia wimmeri O.& I. Deg. | TRWI2 |
| Trematolobelia macrostachys | Trematolobelia macrostachys (Hook. & Arn.) Zahlbr. var. haleakalaensis St. John | TRMAH |
| Triodanis biflora | Specularia biflora (Ruiz & Pav?n) Fisch. & C.A. Mey. | SPBI4 |
| Triodanis biflora | Triodanis perfoliata (L.) Nieuwl. var. biflora (Ruiz & Pav?n) Bradley | TRPEB |
| Triodanis holzingeri | Specularia holzingeri (McVaugh) Fern. | SPHO |
| Triodanis lamprosperma | Specularia lamprosperma (McVaugh) Fern. | SPLA6 |
| Triodanis leptocarpa | Specularia leptocarpa (Nutt.) Gray | SPLE2 |
| Triodanis perfoliata | Legousia perfoliata (L.) Britt. | LEPE5 |
| Triodanis perfoliata | Specularia perfoliata (L.) A. DC. | SPPE5 |
| Triodanis perfoliata | Triodanis perfoliata (L.) Nieuwl. var. perfoliata (L.) Nieuwl. [superfluous autonym] | TRPEP |
| tubeflower bluecup | Githopsis tenella Morin | GITE9 |
| tuffybells | Wahlenbergia linarioides (Lam.) A. DC. | WALI |
| tussock bellflower | Campanula carpatica Jacq. | CACA37 |
| Twisselmann's threadplant | Nemacladus twisselmannii J.T. Howell | NETW |
| Venus's looking-glass | Triodanis Raf. ex Greene | TRIOD |
| Vivald's lobelia | Lobelia vivaldii Lammers & Proctor | LOVI4 |
| Wahiawa cyanea | Cyanea sylvestris Heller | CYSY |
| wahlenbergia | Wahlenbergia Schrad. ex Roth | WAHLE |
| Wahlenbergia marginata | Wahlenbergia gracilis (G. Forst.) A. DC. | WAGR |
| Waianae Range delissea | Delissea sinuata Hbd. | DESI3 |
| Waianae Range lobelia | Lobelia monostachya (Rock) Lammers | LOMO3 |
| Waihanau lobelia | Lobelia dunbarii Rock | LODU2 |
| Waihanau lobelia | Lobelia dunbarii Rock ssp. dunbarii | LODUD3 |
| Waihanau lobelia | Lobelia dunbarii Rock ssp. paniculata (Rock) Lammers | LODUP2 |
| Waihee clermontia | Clermontia multiflora Hbd. | CLMU2 |
| Waihee Valley cyanea | Cyanea lobata Mann | CYLO5 |
| Waihee Valley cyanea | Cyanea lobata Mann ssp. lobata | CYLOL |
| Wailai Pali clermontia | Clermontia pallida Hbd. | CLPA6 |
| Waioiani clermontia | Clermontia persicifolia Gaud. | CLPE3 |
| Waioli Valley rollandia | Cyanea parvifolia (Forbes) Lammers, Givnish & Systma | CYPA23 |
| Waipio Valley clermontia | Clermontia kohalae Rock | CLKO |
| water howellia | Howellia aquatilis Gray | HOAQ |
| wetforest cyanea | Cyanea hamatiflora Rock | CYHA6 |
| wetforest cyanea | Cyanea hamatiflora Rock ssp. hamatiflora | CYHAH |
| white lobelia | Lobelia paludosa Nutt. | LOPA3 |
| Wilkins's bellflower | Campanula wilkinsiana Greene | CAWI8 |
| willow cyanea | Cyanea salicina H. L?v. | CYSA9 |
| woolly bellflower | Campanula lanata Friv. | CALA67 |
| yellowflower clermontia | Clermontia ?fulva Levl. | CLFU |
| Yukon bellflower | Campanula aurita Greene | CAAU |