| Common Name | Scientific Name | Code |
| n/a | Ceanothus ?arcuatus McMinn (pro sp.) [cuneatus ? fresnensis] | CEAR2 |
| n/a | Ceanothus ?bakeri Greene ex C.F. Baker (pro sp.) [gloriosus ? prostratus] | CEBA |
| n/a | Ceanothus ?lobbianus Hook. (pro sp.) [dentatus ? griseus] | CELO |
| n/a | Ceanothus ?lorenzenii (Jepson) McMinn [cordulatus ? velutinus] | CELO2 |
| n/a | Ceanothus ?otayensis McMinn [crassifolus ? greggii] | CEOT |
| n/a | Ceanothus ?pallidus Lindl. | CEPA17 |
| n/a | Ceanothus ?rugosus Greene (pro sp.) [prostratus ? velutinus] | CERU |
| n/a | Ceanothus ?vanrensselaeri J.B. Roof [incanus ? thyrsiflorus] | CEVA |
| n/a | Ceanothus ?veitchianus Hook. (pro sp.) [cuneatus ? griseus] | CEVE4 |
| n/a | Colletia Juss., nom. cons. | COLLE3 |
| n/a | Condalia mexicana Schlecht. [excluded] | COME16 |
| n/a | Condalia velutina I. M. Johnst. | COVE11 |
| n/a | Frangula ?blumeri (Greene) Kartesz & Gandhi (pro sp.) [betulifolia ? californica] | FRBL |
| n/a | Rhamnus ?spathulifolia Fisch. & C. A. Mey. | RHSP8 |
| n/a | Rhamnus arguta Maxim. var. velutina Hand.-Maz. | RHARV |
| n/a | Rhamnus crocea Nutt. ssp. insula (Kellogg) C. B. Wolf [excluded] | RHCRI5 |
| n/a | Rhamnus libanotica Boiss. | RHLI3 |
| n/a | Rhamnus lycioides L. | RHLY |
| n/a | Rhamnus lycioides L. ssp. oleoides (L.) Jahand. & Maire | RHLYO |
| n/a | Rhamnus petiolaris Boiss. | RHPE12 |
| n/a | Smythea lanceata (Tul.) Summerhayes | SMLA4 |
| n/a | Smythea Seem. | SMYTH |
| Alabama supplejack | Berchemia scandens (Hill) K. Koch | BESC |
| alderleaf buckthorn | Rhamnus alnifolia L'H?r. | RHAL |
| alphitonia | Alphitonia Reissek ex Endl. | ALPHI |
| Alphitonia ponderosa | Alphitonia ponderosa Hbd. var. auwahiensis St. John | ALPOA |
| Alphitonia ponderosa | Alphitonia ponderosa Hbd. var. costata St. John | ALPOC |
| Alphitonia ponderosa | Alphitonia ponderosa Hbd. var. grandifolia St. John | ALPOG |
| Alphitonia ponderosa | Alphitonia ponderosa Hbd. var. kauila St. John | ALPOK |
| Alphitonia ponderosa | Alphitonia ponderosa Hbd. var. lanaiensis St. John | ALPOL |
| Asian nakedwood | Colubrina asiatica (L.) Brongn. | COAS3 |
| auerodendron | Auerodendron Urban | AUERO |
| barranca brush | Ceanothus verrucosus Nutt. | CEVE2 |
| beechleaf frangula | Frangula betulifolia (Greene) V. Grub. | FRBE2 |
| beechleaf frangula | Frangula betulifolia (Greene) V. Grub. ssp. betulifolia | FRBEB |
| bigpod ceanothus | Ceanothus megacarpus Nutt. | CEME |
| bigpod ceanothus | Ceanothus megacarpus Nutt. var. megacarpus | CEMEM2 |
| bitter snakewood | Condalia globosa I.M. Johnston | COGL |
| bitter snakewood | Condalia globosa I.M. Johnston var. pubescens I.M. Johnston | COGLP |
| blueblossom | Ceanothus thyrsiflorus Eschsch. | CETH |
| Brazilian bluewood | Condalia hookeri M.C. Johnston | COHO |
| Brazilian bluewood | Condalia hookeri M.C. Johnston var. hookeri | COHOH |
| buckbrush | Ceanothus cuneatus (Hook.) Nutt. | CECU |
| buckbrush | Ceanothus cuneatus (Hook.) Nutt. var. cuneatus | CECUC3 |
| buckthorn | Frangula P. Mill. | FRANG |
| buckthorn | Rhamnus L. | RHAMN |
| cacao rojo | Ziziphus reticulata (Vahl) DC. | ZIRE |
| California buckthorn | Frangula californica (Eschsch.) Gray | FRCA12 |
| California buckthorn | Frangula californica (Eschsch.) Gray ssp. californica | FRCAC5 |
| California buckthorn | Frangula californica (Eschsch.) Gray ssp. crassifolia (Jepson) Kartesz & Gandhi | FRCAC6 |
| California buckthorn | Frangula californica (Eschsch.) Gray ssp. cuspidata (Greene) Kartesz & Gandhi | FRCAC7 |
| California buckthorn | Frangula californica (Eschsch.) Gray ssp. occidentalis (T.J. Howell) Kartesz & Gandhi | FRCAO4 |
| California buckthorn | Frangula californica (Eschsch.) Gray ssp. tomentella (Benth.) Kartesz & Gandhi | FRCAT2 |
| California buckthorn | Frangula californica (Eschsch.) Gray ssp. ursina (Greene) Kartesz & Gandhi | FRCAU |
| California prickbush | Adolphia californica S. Wats. | ADCA2 |
| Calistoga ceanothus | Ceanothus divergens Parry | CEDI |
| Carmel ceanothus | Ceanothus griseus (Trel.) McMinn | CEGR2 |
| Carolina buckthorn | Frangula caroliniana (Walt.) Gray | FRCA13 |
| Cascade Lake ceanothus | Ceanothus ?serrulatus McMinn (pro sp.) [cordulatus ? prostratus] | CESE |
| Cascara buckthorn | Frangula purshiana (DC.) Cooper | FRPU7 |
| ceanothus | Ceanothus L. | CEANO |
| Ceanothus ?lorenzenii | Ceanothus velutinus Dougl. ex Hook. var. lorenzenii Jepson | CEVEL2 |
| Ceanothus americanus | Ceanothus americanus L. var. intermedius (Pursh) Torr. & Gray | CEAMI |
| Ceanothus americanus | Ceanothus americanus L. var. pitcheri Torr. & Gray | CEAMP |
| Ceanothus americanus | Ceanothus intermedius Pursh | CEIN11 |
| Ceanothus arboreus | Ceanothus arboreus Greene var. glabra Jepson | CEARG |
| Ceanothus confusus | Ceanothus divergens Parry ssp. confusus (J.T. Howell) Abrams | CEDIC |
| Ceanothus crassifolius | Ceanothus crassifolius Torr. var. planus Abrams | CECRP |
| Ceanothus cuneatus var. cuneatus | Ceanothus cuneatus (Hook.) Nutt. var. dubius J.T. Howell | CECUD |
| Ceanothus cuneatus var. cuneatus | Ceanothus cuneatus (Hook.) Nutt. var. submontanus (Rose) McMinn | CECUS |
| Ceanothus cuneatus var. cuneatus | Ceanothus ramulosus (Greene) McMinn | CERA |
| Ceanothus cuneatus var. fascicularis | Ceanothus ramulosus (Greene) McMinn var. fascicularis McMinn | CERAF |
| Ceanothus cuneatus var. rigidus | Ceanothus rigidus Nutt. | CERI |
| Ceanothus cuneatus var. rigidus | Ceanothus rigidus Nutt. var. albus J.B. Roof | CERIA |
| Ceanothus dentatus | Ceanothus dentatus Torr. & Gray var. floribundus (Hook.) Trel. | CEDEF |
| Ceanothus diversifolius | Ceanothus decumbens S. Wats. | CEDE8 |
| Ceanothus fendleri | Ceanothus fendleri Gray var. venosus Trel. | CEFEV |
| Ceanothus fendleri | Ceanothus fendleri Gray var. viridis M.E. Jones | CEFEV2 |
| Ceanothus fendleri | Ceanothus subsericeus Rydb. | CESU3 |
| Ceanothus foliosus var. foliosus | Ceanothus austromontanus Abrams | CEAU5 |
| Ceanothus foliosus var. foliosus | Ceanothus dentatus Torr. & Gray var. dickeyi Fosberg | CEDED |
| Ceanothus gloriosus var. gloriosus | Ceanothus prostratus Benth. var. grandiflorus (Torr.) Jepson | CEPRG |
| Ceanothus gloriosus var. gloriosus | Ceanothus rigidus Nutt. var. grandiflorus Torr. | CERIG |
| Ceanothus greggii var. greggii | Ceanothus greggii Gray var. orbiculatus E.H. Kelso | CEGRO |
| Ceanothus greggii var. perplexans | Ceanothus greggii Gray ssp. perplexans (Trel.) Beauchamp | CEGRP2 |
| Ceanothus greggii var. perplexans | Ceanothus perplexans Trel. | CEPE6 |
| Ceanothus greggii var. vestitus | Ceanothus greggii Gray ssp. vestitus (Greene) Thorne | CEGRV2 |
| Ceanothus greggii var. vestitus | Ceanothus vestitus Greene | CEVE9 |
| Ceanothus griseus | Ceanothus griseus (Trel.) McMinn var. horizontalis McMinn | CEGRH |
| Ceanothus herbaceus | Ceanothus herbaceus Raf. var. pubescens (Torr. & Gray ex S. Wats.) Shinners | CEHEP |
| Ceanothus herbaceus | Ceanothus ovatus auct. non Desf. [misapplied] | CEOV |
| Ceanothus herbaceus | Ceanothus ovatus Desf. var. pubescens Torr. & Gray ex S. Wats. | CEOVP |
| Ceanothus herbaceus | Ceanothus pubescens (Torr. & Gray ex S. Wats.) Rydb. ex Small | CEPU7 |
| Ceanothus integerrimus | Ceanothus andersonii Parry | CEAN2 |
| Ceanothus integerrimus | Ceanothus californicus Kellogg | CECA7 |
| Ceanothus integerrimus | Ceanothus integerrimus Hook. & Arn. var. californicus (Kellogg) G.T. Benson | CEINC |
| Ceanothus integerrimus | Ceanothus integerrimus Hook. & Arn. var. macrothyrsus (Torr.) G.T. Benson | CEINM |
| Ceanothus integerrimus | Ceanothus integerrimus Hook. & Arn. var. puberulus (Greene) Abrams | CEINP |
| Ceanothus megacarpus var. insularis | Ceanothus insularis Eastw. | CEIN9 |
| Ceanothus megacarpus var. insularis | Ceanothus megacarpus Nutt. ssp. insularis (Eastw.) Raven | CEMEI |
| Ceanothus megacarpus var. megacarpus | Ceanothus megacarpus Nutt. var. pendulus McMinn | CEMEP |
| Ceanothus oliganthus | Ceanothus divaricatus Nutt. | CEDI9 |
| Ceanothus oliganthus | Ceanothus hirsutus Nutt. | CEHI |
| Ceanothus oliganthus | Ceanothus oliganthus Nutt. var. oliganthus Nutt. [superfluous autonym] | CEOLO5 |
| Ceanothus oliganthus | Ceanothus oliganthus Nutt. var. orcuttii (Parry) Jepson | CEOLO |
| Ceanothus oliganthus | Ceanothus orcuttii Parry | CEOR4 |
| Ceanothus palmeri | Ceanothus spinosus Nutt. var. palmeri (Trel.) Jepson | CESPP |
| Ceanothus papillosus var. papillosus | Ceanothus ?regius (Jepson) McMinn | CERE |
| Ceanothus papillosus var. papillosus | Ceanothus papillosus Torr. & Gray ssp. regius Jepson | CEPAR3 |
| Ceanothus prostratus | Ceanothus divergens Parry ssp. occidentalis (McMinn) Abrams | CEDIO |
| Ceanothus prostratus | Ceanothus prostratus Benth. var. laxus Jepson | CEPRL |
| Ceanothus prostratus | Ceanothus prostratus Benth. var. occidentalis McMinn | CEPRO |
| Ceanothus pumilus | Ceanothus ?humboldtensis J.B. Roof | CEHU2 |
| Ceanothus purpureus | Ceanothus jepsonii Greene var. purpureus (Jepson) Jepson | CEJEP |
| Ceanothus sanguineus | Ceanothus oreganus Nutt. | CEOR3 |
| Ceanothus sorediatus | Ceanothus intricatus Parry | CEIN8 |
| Ceanothus sorediatus | Ceanothus oliganthus Nutt. ssp. sorediatus (Hook. & Arn.) C. Schmidt | CEOLS |
| Ceanothus sorediatus | Ceanothus oliganthus Nutt. var. sorediatus (Hook. & Arn.) Hoover | CEOLS2 |
| Ceanothus thyrsiflorus | Ceanothus thyrsiflorus Eschsch. var. repens McMinn | CETHR |
| Ceanothus tomentosus | Ceanothus tomentosus Parry ssp. olivaceus (Jepson) Munz | CETOO2 |
| Ceanothus tomentosus | Ceanothus tomentosus Parry var. olivaceus Jepson | CETOO |
| Ceanothus velutinus var. hookeri | Ceanothus velutinus Dougl. ex Hook. var. laevigatus Torr. & Gray | CEVEL |
| chaparral whitethorn | Ceanothus leucodermis Greene | CELE2 |
| chewstick | Gouania Jacq. | GOUAN |
| Chinese buckthorn | Rhamnus utilis Dcne. | RHUT80 |
| coast whitethorn | Ceanothus incanus Torr. & Gray | CEIN |
| coastal plain buckbrush | Ceanothus serpyllifolius Nutt. | CESE5 |
| Colletia spinosissima | Colletia spinosa Lam. | COSP13 |
| Colubrina arborescens | Colubrina colubrina (Jacq.) Millsp. | COCO19 |
| Colubrina californica | Colubrina texensis (Torr. & Gray) Gray var. californica (I.M. Johnston) L. Benson | COTEC2 |
| Colubrina elliptica | Colubrina reclinata (L'H?r.) Brongn. | CORE7 |
| Colubrina glandulosa var. antillana | Colubrina rufa (Vell.) Reissek var. antillana M.C. Johnston | CORUA |
| Colubrina verrucosa | Colubrina urbanii M.C. Johnston | COUR |
| Colubrina verrucosa | Hybosperma spinosum Urban | HYSP7 |
| comal nakedwood | Colubrina stricta Engelm. ex M.C. Johnston | COST6 |
| common buckthorn | Rhamnus cathartica L. | RHCA3 |
| common jujube | Ziziphus zizyphus (L.) Karst. | ZIZI |
| Condalia ericoides | Microrhamnus ericoides Gray | MIER |
| Condalia hookeri var. hookeri | Condalia obovata Hook. | COOB7 |
| Correll's snakewood | Condalia correllii M.C. Johnston | COCO11 |
| Coville ceanothus | Ceanothus pinetorum Coville | CEPI |
| Coyote ceanothus | Ceanothus ferrisiae McMinn | CEFE2 |
| coyotillo | Karwinskia humboldtiana (J.A. Schultes) Zucc. | KAHU |
| Cuban nakedwood | Colubrina cubensis (Jacq.) Brongn. | COCU |
| Cuban nakedwood | Colubrina cubensis (Jacq.) Brongn. var. floridana M.C. Johnston | COCUF |
| Dahurian buckthorn | Rhamnus davurica Pallas | RHDA |
| Dahurian buckthorn | Rhamnus davurica Pallas ssp. davurica | RHDAD2 |
| Dahurian buckthorn | Rhamnus davurica Pallas ssp. nipponica (Makino) Kartesz & Gandhi | RHDAN2 |
| darlingplum | Reynosia Griseb. | REYNO2 |
| darlingplum | Reynosia septentrionalis Urban | RESE |
| deerbrush | Ceanothus integerrimus Hook. & Arn. | CEIN3 |
| desert ceanothus | Ceanothus greggii Gray | CEGR |
| desert ceanothus | Ceanothus greggii Gray var. franklinii Welsh | CEGRF |
| desert ceanothus | Ceanothus greggii Gray var. greggii | CEGRG2 |
| desert ceanothus | Ceanothus greggii Gray var. perplexans (Trel.) Jepson | CEGRP |
| dwarf ceanothus | Ceanothus pumilus Greene | CEPU |
| Edwards's bluewood | Condalia hookeri M.C. Johnston var. edwardsiana (Cory) M.C. Johnston | COHOE |
| feltleaf ceanothus | Ceanothus arboreus Greene | CEAR |
| Fendler's ceanothus | Ceanothus fendleri Gray | CEFE |
| flexible ceanothus | Ceanothus ?flexilis Greene ex McMinn [cuneatus ? prostratus] | CEFL4 |
| Florida jujube | Ziziphus celata Judd & Hall | ZICE |
| Frangula ?blumeri | Rhamnus blumeri Greene | RHBL2 |
| Frangula alnus | Rhamnus frangula L. | RHFR |
| Frangula alnus | Rhamnus frangula L. ssp. columnaris hort. | RHFRC2 |
| Frangula alnus | Rhamnus frangula L. var. angustifolia Loud. | RHFRA |
| Frangula betulifolia ssp. betulifolia | Rhamnus betulifolia Greene | RHBE |
| Frangula betulifolia ssp. obovata | Rhamnus betulifolia Greene var. obovata Kearney & Peebles | RHBEO |
| Frangula californica ssp. californica | Rhamnus californica Eschsch. | RHCA |
| Frangula californica ssp. californica | Rhamnus californica Eschsch. ssp. californica Eschsch. [superfluous autonym] | RHCAC8 |
| Frangula californica ssp. crassifolia | Rhamnus californica Eschsch. ssp. crassifolia (Jepson) C.B. Wolf | RHCAC |
| Frangula californica ssp. crassifolia | Rhamnus tomentella Benth. ssp. crassifolia (Jepson) J.O. Sawyer | RHTOC |
| Frangula californica ssp. cuspidata | Rhamnus californica Eschsch. ssp. cuspidata (Greene) C.B. Wolf | RHCAC2 |
| Frangula californica ssp. cuspidata | Rhamnus tomentella Benth. ssp. cuspidata (Greene) J.O. Sawyer | RHTOC2 |
| Frangula californica ssp. occidentalis | Rhamnus californica Eschsch. ssp. occidentalis (T.J. Howell) C.B. Wolf | RHCAO |
| Frangula californica ssp. occidentalis | Rhamnus californica Eschsch. var. occidentalis (T.J. Howell) Jepson | RHCAO2 |
| Frangula californica ssp. tomentella | Rhamnus californica Eschsch. ssp. tomentella (Benth.) C.B. Wolf | RHCAT |
| Frangula californica ssp. tomentella | Rhamnus tomentella Benth. | RHTO6 |
| Frangula californica ssp. tomentella | Rhamnus tomentella Benth. ssp. tomentella Benth. [superfluous autonym] | RHTOT4 |
| Frangula californica ssp. ursina | Rhamnus californica Eschsch. ssp. ursina (Greene) C.B. Wolf | RHCAU2 |
| Frangula californica ssp. ursina | Rhamnus californica Eschsch. var. ursina (Greene) McMinn | RHCAU3 |
| Frangula californica ssp. ursina | Rhamnus tomentella Benth. ssp. ursina (Greene) J.O. Sawyer | RHTOU |
| Frangula caroliniana | Rhamnus caroliniana Walt. | RHCA2 |
| Frangula caroliniana | Rhamnus caroliniana Walt. var. mollis Fern. | RHCAM |
| Frangula purshiana | Rhamnus purshiana DC. | RHPU |
| Frangula rubra ssp. modocensis | Rhamnus rubra Greene ssp. modocensis C.B. Wolf | RHRUM |
| Frangula rubra ssp. nevadensis | Rhamnus rubra Greene ssp. nevadensis (A. Nels.) C.B. Wolf | RHRUN |
| Frangula rubra ssp. obtusissima | Rhamnus rubra Greene ssp. obtusissima (Greene) C.B. Wolf | RHRUO |
| Frangula rubra ssp. rubra | Rhamnus rubra Greene | RHRU |
| Frangula rubra ssp. yosemitana | Rhamnus rubra Greene ssp. yosemitana C.B. Wolf | RHRUY |
| Frangula sphaerosperma ssp. longipes | Rhamnus sphaerosperma Sw. var. longipes M.C. & L.A. Johnston | RHSPL |
| French hybrid ceanothus | Ceanothus ?delileanus Spach | CEDE11 |
| Fresno mat | Ceanothus fresnensis Dudley ex Abrams | CEFR |
| glandular nakedwood | Colubrina glandulosa Perkins | COGL5 |
| glandular nakedwood | Colubrina glandulosa Perkins var. antillana (M.C. Johnston) M.C. Johnston | COGLA |
| glossy buckthorn | Frangula alnus P. Mill. | FRAL4 |
| Gouania hillebrandii | Gouania cucullata St. John | GOCU |
| Gouania hillebrandii | Gouania faurieri St. John | GOFA |
| Gouania hillebrandii | Gouania lydgatei St. John | GOLY |
| Gouania hillebrandii | Gouania mannii St. John | GOMA |
| Gouania hillebrandii | Gouania pilata St. John | GOPI |
| Gouania hillebrandii | Gouania remyi St. John | GORE3 |
| Gouania hillebrandii | Gouania sandwichiana St. John | GOSA2 |
| Gouania hillebrandii | Gouania thinophila St. John | GOTH2 |
| Gouania lupuloides | Banisteria lupuloides L. | BALU4 |
| Gouania meyenii | Gouania gagnei St. John | GOGA |
| Gouania meyenii | Gouania oliveri St. John | GOOL |
| Gouania vitifolia | Gouania bishopii Hbd. | GOBI2 |
| Gouania vitifolia | Gouania hawaiiensis St. John | GOHA2 |
| green snakewood | Condalia viridis I.M. Johnston | COVI8 |
| greenheart | Colubrina arborescens (P. Mill.) Sarg. | COAR3 |
| guama | Reynosia guama Urban | REGU |
| hairy ceanothus | Ceanothus oliganthus Nutt. | CEOL |
| hairyfruit chewstick | Gouania hillebrandii Oliver ex Hbd. | GOHI2 |
| Hawai'i kauilatree | Alphitonia ponderosa Hbd. | ALPO3 |
| Hearst Ranch buckbrush | Ceanothus hearstiorum Hoover & J.B. Roof | CEHE2 |
| hoaryleaf ceanothus | Ceanothus crassifolius Torr. | CECR |
| hollyleaf buckthorn | Rhamnus crocea Nutt. ssp. pilosa (Trel.) C.B. Wolf | RHCRP2 |
| hollyleaf ceanothus | Ceanothus purpureus Jepson | CEPU2 |
| hollyleaf redberry | Rhamnus ilicifolia Kellogg | RHIL |
| Hooker's ceanothus | Ceanothus velutinus Dougl. ex Hook. var. hookeri M.C. Johnston | CEVEH2 |
| hovenia | Hovenia Thunb. | HOVEN |
| Indian jujube | Ziziphus mauritiana Lam. | ZIMA |
| island ceanothus | Ceanothus megacarpus Nutt. var. insularis (Eastw.) Munz | CEMEI2 |
| island redberry | Rhamnus pirifolia Greene | RHPI |
| Italian buckthorn | Rhamnus alaternus L. | RHAL12 |
| Japanese buckthorn | Rhamnus japonica Maxim. | RHJA8 |
| Japanese raisintree | Hovenia dulcis Thunb. | HODU2 |
| javelin bush | Condalia ericoides (Gray) M.C. Johnston | COER5 |
| Jepson ceanothus | Ceanothus jepsonii Greene | CEJE |
| Jepson ceanothus | Ceanothus jepsonii Greene var. albiflorus J.T. Howell | CEJEA |
| Jepson ceanothus | Ceanothus jepsonii Greene var. jepsonii | CEJEJ2 |
| Jersey tea | Ceanothus herbaceus Raf. | CEHE |
| Jeruselem thorn | Paliurus P. Mill. | PALIU |
| Jeruselem thorn | Paliurus spina-christi P. Mill. | PASP16 |
| jimbrush | Ceanothus sorediatus Hook. & Arn. | CESO2 |
| jujube | Ziziphus nummularia (Burman f.) Wight & Arn. | ZINU2 |
| jujube | Ziziphus P. Mill. | ZIZIP |
| junco | Adolphia infesta (Kunth) Meisn. | ADIN |
| karwinskia | Karwinskia Zucc. | KARWI |
| kauila | Colubrina oppositifolia Brongn. ex Mann | COOP |
| Kearney's snakewood | Condalia warnockii M.C. Johnston var. kearneyana M.C. Johnston | COWAK |
| knifeleaf condalia | Condalia spathulata Gray | COSP3 |
| Krug's darlingplum | Reynosia krugii Urban | REKR |
| krugiodendron | Krugiodendron Urban | KRUGI |
| Krugiodendron ferreum | Rhamnus ferreus Vahl | RHFE2 |
| lanceleaf buckthorn | Rhamnus lanceolata Pursh | RHLA |
| lanceleaf buckthorn | Rhamnus lanceolata Pursh ssp. glabrata (Gleason) Kartesz & Gandhi | RHLAG2 |
| lanceleaf buckthorn | Rhamnus lanceolata Pursh ssp. lanceolata | RHLAL3 |
| Las Animas nakedwood | Colubrina californica I.M. Johnston | COCA18 |
| leadwood | Krugiodendron ferreum (Vahl) Urban | KRFE |
| Lemmon's ceanothus | Ceanothus lemmonii Parry | CELE |
| liane savon | Gouania polygama (Jacq.) Urban | GOPO |
| littleleaf buckbrush | Ceanothus microphyllus Michx. | CEMI4 |
| littleleaf ceanothus | Ceanothus parvifolius (S. Wats.) Trel. | CEPA4 |
| lokao | Rhamnus globosa Bunge | RHGL8 |
| lotebush | Ziziphus obtusifolia (Hook. ex Torr. & Gray) Gray | ZIOB |
| lotebush | Ziziphus obtusifolia (Hook. ex Torr. & Gray) Gray var. canescens (Gray) M.C. Johnston | ZIOBC |
| lotebush | Ziziphus obtusifolia (Hook. ex Torr. & Gray) Gray var. obtusifolia | ZIOBO |
| lotus jujube | Ziziphus lotus (L.) Lam. | ZILO |
| maritime ceanothus | Ceanothus maritimus Hoover | CEMA |
| Martin's ceanothus | Ceanothus martinii M.E. Jones | CEMA2 |
| Mason's ceanothus | Ceanothus masonii McMinn | CEMA3 |
| Mendocino ceanothus | Ceanothus ?mendocinensis McMinn [thyrsiflorus ? velutinus] | CEME3 |
| mock buckthorn | Sageretia Brongn. | SAGER |
| Modoc buckthorn | Frangula rubra (Greene) V. Grub. ssp. modocensis (C.B. Wolf) Kartesz & Gandhi | FRRUM |
| Mojave ceanothus | Ceanothus greggii Gray var. vestitus (Greene) McMinn | CEGRV |
| Monterey ceanothus | Ceanothus cuneatus (Hook.) Nutt. var. rigidus (Nutt.) Hoover | CECUR2 |
| Mt. Vision ceanothus | Ceanothus gloriosus J.T. Howell var. porrectus J.T. Howell | CEGLP |
| nakedwood | Colubrina L.C. Rich. ex Brongn. | COLUB |
| Nevada buckthorn | Frangula rubra (Greene) V. Grub. ssp. nevadensis (A. Nels.) Kartesz & Gandhi | FRRUN |
| New Jersey tea | Ceanothus americanus L. | CEAM |
| Oahu chewstick | Gouania vitifolia Gray | GOVI |
| obovate buckthorn | Frangula betulifolia (Greene) V. Grub. ssp. obovata (Kearney & Peebles) Kartesz & Gandhi | FRBEO |
| obtuse buckthorn | Frangula rubra (Greene) V. Grub. ssp. obtusissima (Greene) Kartesz & Gandhi | FRRUO |
| Paliurus spina-christi | Rhamnus paliurus L. | RHPA8 |
| Palmer ceanothus | Ceanothus palmeri Trel. | CEPA |
| Parry ceanothus | Ceanothus parryi Trel. | CEPA3 |
| Parry's jujube | Ziziphus parryi Torr. | ZIPA |
| pauper's-tea | Sageretia thea (Osbeck) M.C. Johnston | SATH5 |
| Pine Hill buckbrush | Ceanothus roderickii Knight | CERO4 |
| pinemat | Ceanothus diversifolius Kellogg | CEDI2 |
| Point Reyes ceanothus | Ceanothus gloriosus J.T. Howell | CEGL |
| Point Reyes ceanothus | Ceanothus gloriosus J.T. Howell var. exaltatus J.T. Howell | CEGLE |
| Point Reyes ceanothus | Ceanothus gloriosus J.T. Howell var. gloriosus | CEGLG3 |
| prickbush | Adolphia Meisn. | ADOLP |
| prostrate ceanothus | Ceanothus prostratus Benth. | CEPR |
| red buckthorn | Frangula rubra (Greene) V. Grub. | FRRU |
| red buckthorn | Frangula rubra (Greene) V. Grub. ssp. rubra | FRRUR |
| redberry buckthorn | Rhamnus crocea Nutt. | RHCR |
| redberry buckthorn | Rhamnus crocea Nutt. ssp. crocea | RHCRC |
| redheart | Ceanothus spinosus Nutt. | CESP |
| redstem ceanothus | Ceanothus sanguineus Pursh | CESA |
| Rhamnus crocea ssp. pilosa | Rhamnus pilosa (Trel.) Abrams | RHPI4 |
| Rhamnus davurica ssp. davurica | Rhamnus citrifolia (Weston) Hess & Stern, non Rusby | RHCI5 |
| Rhamnus davurica ssp. nipponica | Rhamnus davurica Pallas var. nipponica Makino | RHDAN |
| Rhamnus globosa | Rhamnus chlorophora Decne. | RHCH10 |
| Rhamnus globosa | Rhamnus globosus Bunge [orthographic variant] | RHGL7 |
| Rhamnus ilicifolia | Rhamnus crocea Nutt. ssp. ilicifolia (Kellogg) C.B. Wolf | RHCRI2 |
| Rhamnus ilicifolia | Rhamnus crocea Nutt. var. ilicifolia (Kellogg) Greene | RHCRI3 |
| Rhamnus lanceolata ssp. glabrata | Rhamnus lanceolata Pursh var. glabrata Gleason | RHLAG |
| Rhamnus lycioides ssp. oleoides | Rhamnus oleoides L. | RHOL2 |
| Rhamnus pirifolia | Rhamnus crocea Nutt. ssp. pirifolia (Greene) C.B. Wolf | RHCRP4 |
| Rhamnus pirifolia | Rhamnus crocea Nutt. var. pirifolia (Greene) Little | RHCRP3 |
| Rhamnus saxatilis | Rhamnus infectoria L. | RHIN15 |
| Rhamnus serrata | Rhamnus fasciculata Greene | RHFA2 |
| Rhamnus serrata | Rhamnus smithii Greene ssp. fasciculata (Greene) C.B. Wolf | RHSMF |
| Rhamnus smithii | Rhamnus smithii Greene ssp. typica C.B. Wolf | RHSMT |
| Rincon Ridge ceanothus | Ceanothus confusus J.T. Howell | CECO6 |
| rock buckthorn | Rhamnus saxatilis Jacq. | RHSA7 |
| rosea | Colletia spinosissima J.F. Gmel. | COSP14 |
| Sageretia minutiflora | Rhamnus minutiflora Michx. | RHMI12 |
| San Diego buckbrush | Ceanothus cyaneus Eastw. | CECY |
| sandscrub ceanothus | Ceanothus dentatus Torr. & Gray | CEDE |
| Santa Barbara ceanothus | Ceanothus impressus Trel. | CEIM |
| Santa Barbara ceanothus | Ceanothus impressus Trel. var. impressus | CEIMI |
| Santa Barbara ceanothus | Ceanothus impressus Trel. var. nipomensis McMinn | CEIMN |
| sawleaf buckthorn | Rhamnus serrata Humb. & Bonpl. ex J.A. Schultes | RHSE3 |
| sedgeleaf buckbrush | Ceanothus cuneatus (Hook.) Nutt. var. fascicularis (McMinn) Hoover | CECUF2 |
| sharp-tooth buckthorn | Rhamnus arguta Maxim. | RHAR6 |
| Sierra nakedwood | Colubrina greggii S. Wats. | COGR7 |
| sloe | Reynosia uncinata Urban | REUN |
| smallflower mock buckthorn | Sageretia minutiflora (Michx.) C. Mohr | SAMI10 |
| Smith's buckthorn | Rhamnus smithii Greene | RHSM |
| smoothfruit chewstick | Gouania meyenii Steud. | GOME |
| snakewood | Condalia Cav. | CONDA |
| snowbrush ceanothus | Ceanothus velutinus Dougl. ex Hook. | CEVE |
| snowbrush ceanothus | Ceanothus velutinus Dougl. ex Hook. var. velutinus | CEVEV4 |
| soana | Ziziphus rignonii Delponte | ZIRI |
| soldierwood | Colubrina elliptica (Sw.) Briz. & Stern | COEL2 |
| Sonoma ceanothus | Ceanothus sonomensis J.T. Howell | CESO |
| supplejack | Berchemia Neck. ex DC. | BERCH |
| Taylor's jujube | Ziziphus taylorii (Britt.) M.C. Johnston | ZITA |
| Texan hogplum | Colubrina texensis (Torr. & Gray) Gray | COTE6 |
| Texan hogplum | Colubrina texensis (Torr. & Gray) Gray var. pedunculata M.C. Johnston | COTEP |
| Texan hogplum | Colubrina texensis (Torr. & Gray) Gray var. texensis | COTET |
| trailing buckbrush | Ceanothus connivens Greene | CECO2 |
| turtlefat | Auerodendron pauciflorum Alain | AUPA2 |
| umbrella-tree | Maesopsis eminii Engl. | MAEM2 |
| umbrella-tree | Maesopsis Engl. | MAESO |
| Urban's nakedwood | Colubrina verrucosa (Urban) M.C. Johnston | COVE6 |
| Vail Lake ceanothus | Ceanothus ophiochilus Boyd, Ross & Arnseth | CEOP |
| Vine Hill ceanothus | Ceanothus foliosus Parry var. vineatus McMinn | CEFOV |
| Warnock's snakewood | Condalia warnockii M.C. Johnston | COWA |
| Warnock's snakewood | Condalia warnockii M.C. Johnston var. warnockii | COWAW |
| wartleaf ceanothus | Ceanothus papillosus Torr. & Gray | CEPA2 |
| wartleaf ceanothus | Ceanothus papillosus Torr. & Gray var. papillosus | CEPAP3 |
| wartleaf ceanothus | Ceanothus papillosus Torr. & Gray var. roweanus McMinn | CEPAR |
| wavyleaf buckbrush | Ceanothus foliosus Parry var. medius McMinn | CEFOM |
| wavyleaf ceanothus | Ceanothus foliosus Parry | CEFO |
| wavyleaf ceanothus | Ceanothus foliosus Parry var. foliosus | CEFOF3 |
| West Indian buckthorn | Frangula sphaerosperma (Sw.) Kartesz & Gandhi | FRSP2 |
| West Indian buckthorn | Frangula sphaerosperma (Sw.) Kartesz & Gandhi ssp. longipes (M.C. & L.A. Johnston) Kartesz & Gandhi | FRSPL |
| whiteroot | Gouania lupuloides (L.) Urban | GOLU2 |
| whitethorn ceanothus | Ceanothus cordulatus Kellogg | CECO |
| woolyleaf ceanothus | Ceanothus tomentosus Parry | CETO |
| Wright's mock buckthorn | Sageretia wrightii S. Wats. | SAWR |
| Yosemite buckthorn | Frangula rubra (Greene) V. Grub. ssp. yosemitana (C.B. Wolf) Kartesz & Gandhi | FRRUY |
| Ziziphus mauritiana | Ziziphus jujuba (L.) Lam., non P. Mill. | ZIJU2 |
| Ziziphus obtusifolia var. canescens | Condalia lycioides (Gray) Weberb. var. canescens (Gray) Trel. | COLYC |
| Ziziphus obtusifolia var. canescens | Condaliopsis lycioides (Gray) Suess. var. canescens (Gray) Suess. | COLYC2 |
| Ziziphus obtusifolia var. obtusifolia | Condalia lycioides (Gray) Weberb. | COLY2 |
| Ziziphus obtusifolia var. obtusifolia | Condalia obtusifolia (Hook. ex Torr. & Gray) Weberb. | COOB6 |
| Ziziphus obtusifolia var. obtusifolia | Condaliopsis lycioides (Gray) Suess. | COLY3 |
| Ziziphus parryi | Condalia parryi (Torr.) Weberb. | COPA27 |
| Ziziphus parryi | Condaliopsis parryi (Torr.) Suess. | COPA21 |
| Ziziphus parryi | Ziziphus parryi Torr. var. parryi Torr. [superfluous autonym] | ZIPAP3 |
| Ziziphus reticulata | Sarcomphalus reticulatus (Vahl) Urban | SARE14 |
| Ziziphus rignonii | Sarcomphalus domingensis (Spreng.) Krug & Urban | SADO9 |
| Ziziphus taylorii | Sarcomphalus taylorii Britt. | SATA3 |
| Ziziphus zizyphus | Ziziphus jujuba P. Mill. | ZIJU |