| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| CEMUA | Ceratophyllum muricatum Cham. ssp. australe (Griseb.) D.H. Les | prickly hornwort | Ceratophyllaceae
|
| CEMU3 | Ceratophyllum muricatum Cham. | prickly hornwort | Ceratophyllaceae
|
| CESUM | Ceratophyllum submersum L. ssp. muricatum auct. non (Cham.) Wilmot-Dear | Ceratophyllum muricatum ssp. australe | Ceratophyllaceae
|
| CESUE | Ceratophyllum submersum L. var. echinatum (Gray) Wilmot-Dear | Ceratophyllum echinatum | Ceratophyllaceae
|
| CERAT | Ceratophyllum L. | hornwort | Ceratophyllaceae
|
| CEDE7 | Ceratopteris deltoidea Benedict | Ceratopteris thalictroides | Parkeriaceae
|
| CEPT | Ceratopteris pteridoides (Hook.) Hieron. | floating antlerfern | Parkeriaceae
|
| CERI2 | Ceratopteris richardii Brongn. | triangle waterfern | Parkeriaceae
|
| CESI5 | Ceratopteris siliquosa (L.) Copeland | Ceratopteris thalictroides | Parkeriaceae
|
| CETH2 | Ceratopteris thalictroides (L.) Brongn. | watersprite | Parkeriaceae
|
| CERAT2 | Ceratopteris Brongn. | antlerfern | Parkeriaceae
|
| CEPO2 | Ceratostema portoricensis (Urban) Hoerold | Gonocalyx portoricensis | Ericaceae
|
| CEPL2 | Ceratostigma plumbaginoides Bunge | blue leadwood | Plumbaginaceae
|
| CEWI2 | Ceratostigma willmottianum Stapf | Chinese-plumbago | Plumbaginaceae
|
| CERAT7 | Ceratostigma Bunge | ceratostigma | Plumbaginaceae
|
| CESE9 | Ceratotheca sesamoides Endl. | false sesame | Pedaliaceae
|
| CETR5 | Ceratotheca triloba (Bernh.) E. Mey. ex Hook. f. | wild foxglove | Pedaliaceae
|
| CERAT6 | Ceratotheca Endl. | ceratotheca | Pedaliaceae
|
| CECO3 | Ceratoxalis coloradensis (Rydb.) Lunell | Oxalis stricta | Oxalidaceae
|
| CECY3 | Ceratoxalis cymosa (Small) Lunell | Oxalis stricta | Oxalidaceae
|
| CETH6 | Cerbera thevetia L. | Thevetia peruviana | Apocynaceae
|
| CEJA2 | Cercidiphyllum japonicum Sieb. & Zucc. ex J. Hoffmann & H. Schult. | katsura tree | Cercidiphyllaceae
|
| CERCI3 | Cercidiphyllum Sieb. & Zucc. | katsura tree | Cercidiphyllaceae
|
| CEFL6 | Cercidium floridum Benth. ex Gray | Parkinsonia florida | Fabaceae
|
| CEMA12 | Cercidium macrum I.M. Johnston | Parkinsonia texana var. macra | Fabaceae
|
| CEMI6 | Cercidium microphyllum (Torr.) Rose & I.M. Johnston | Parkinsonia microphylla | Fabaceae
|
| CETE8 | Cercidium texanum Gray | Parkinsonia texana var. texana | Fabaceae
|
| CEDE14 | Cercidospora decolorella (Nyl.) O. E. Erikss. & J. Z. Yue | | Uncertain Lichen Family
|
| CEEP2 | Cercidospora epicarpinea (Nyl.) Grube & Hafellner | | Uncertain Lichen Family
|
| CEEP | Cercidospora epipolytropa (Mudd) Arnold | | Uncertain Lichen Family
|
| CEUL | Cercidospora ulothii Korber | | Uncertain Lichen Family
|
| CERCI4 | Cercidospora Korber | cercidospora | Uncertain Lichen Family
|
| CECAM2 | Cercis canadensis L. ssp. mexicana (Rose) E. Murr. | Cercis canadensis var. mexicana | Fabaceae
|
| CECAT2 | Cercis canadensis L. ssp. texensis (S. Wats.) E. Murr. | Cercis canadensis var. texensis | Fabaceae
|
| CECAC | Cercis canadensis L. var. canadensis | eastern redbud | Fabaceae
|
| CECAM | Cercis canadensis L. var. mexicana (Rose) M. Hopkins | Mexican redbud | Fabaceae
|
| CECAO | Cercis canadensis L. var. orbiculata (Greene) Barneby | Cercis orbiculata | Fabaceae
|
| CECAT | Cercis canadensis L. var. texensis (S. Wats.) M. Hopkins | Texas redbud | Fabaceae
|
| CECA4 | Cercis canadensis L. | eastern redbud | Fabaceae
|
| CEOCO | Cercis occidentalis Torr. ex Gray var. orbiculata (Greene) Tidestrom | Cercis orbiculata | Fabaceae
|
| CEOC3 | Cercis occidentalis Torr. ex Gray | Cercis canadensis var. texensis | Fabaceae
|
| CEOR9 | Cercis orbiculata Greene | California redbud | Fabaceae
|
| CERCI2 | Cercis L. | redbud | Fabaceae
|
| CEAL8 | Cercocarpus alnifolius Rydb. | Cercocarpus montanus var. blancheae | Rosaceae
|
| CEAR8 | Cercocarpus argenteus Rydb. | Cercocarpus montanus var. argenteus | Rosaceae
|
| CEBEB | Cercocarpus betuloides Nutt. var. blancheae (Schneid.) Little | Cercocarpus montanus var. blancheae | Rosaceae
|
| CEBEM | Cercocarpus betuloides Nutt. var. macrourus (Rydb.) Jepson | Cercocarpus montanus var. macrourus | Rosaceae
|
| CEBEM2 | Cercocarpus betuloides Nutt. var. multiflorus Jepson | Cercocarpus montanus var. glaber | Rosaceae
|
| CEBET2 | Cercocarpus betuloides Nutt. var. traskiae (Eastw.) Dunkle | Cercocarpus traskiae | Rosaceae
|
| CEBE3 | Cercocarpus betuloides Nutt. | Cercocarpus montanus var. glaber | Rosaceae
|
| CEBRE | Cercocarpus breviflorus Gray var. eximius Schneid. | Cercocarpus montanus var. paucidentatus | Rosaceae
|
| CEBR6 | Cercocarpus breviflorus Gray | Cercocarpus montanus var. paucidentatus | Rosaceae
|
| CEINV | Cercocarpus intricatus S. Wats. var. villosus Schneid. | Cercocarpus intricatus | Rosaceae
|
| CEIN7 | Cercocarpus intricatus S. Wats. | littleleaf mountain mahogany | Rosaceae
|
| CELEH | Cercocarpus ledifolius Nutt. var. hypoleucus (Rydb.) M.E. Peck | Cercocarpus ledifolius var. ledifolius | Rosaceae
|
| CELEI | Cercocarpus ledifolius Nutt. var. intercedens Schneid. | curl-leaf mountain mahogany | Rosaceae
|
| CELEI4 | Cercocarpus ledifolius Nutt. var. intermontanus N. Holmgren | curl-leaf mountain mahogany | Rosaceae
|
| CELEI3 | Cercocarpus ledifolius Nutt. var. intricatus (S. Wats.) M.E. Jones | Cercocarpus intricatus | Rosaceae
|
| CELEL | Cercocarpus ledifolius Nutt. var. ledifolius | curl-leaf mountain mahogany | Rosaceae
|
| CELE3 | Cercocarpus ledifolius Nutt. | curl-leaf mountain mahogany | Rosaceae
|
| CEMI3 | Cercocarpus minutiflorus Abrams | Cercocarpus montanus var. minutiflorus | Rosaceae
|
| CEMOB2 | Cercocarpus montanus Raf. ssp. blancheae (Schneid.) Thorne | Cercocarpus montanus var. blancheae | Rosaceae
|
| CEMOA | Cercocarpus montanus Raf. var. argenteus (Rydb.) F.L. Martin | silver mountain mahogany | Rosaceae
|
| CEMOB | Cercocarpus montanus Raf. var. blancheae (Schneid.) F.L. Martin | island mountain mahogany | Rosaceae
|
| CEMOF | Cercocarpus montanus Raf. var. flabellifolius (Rydb.) Kearney & Peebles | Cercocarpus montanus var. montanus | Rosaceae
|
| CEMOG | Cercocarpus montanus Raf. var. glaber (S. Wats.) F.L. Martin | birchleaf mountain mahogany | Rosaceae
|
| CEMOM2 | Cercocarpus montanus Raf. var. macrourus (Rydb.) F.L. Martin | Klamath mountain mahogany | Rosaceae
|
| CEMOM | Cercocarpus montanus Raf. var. minutiflorus (Abrams) F.L. Martin | smooth mountain mahogany | Rosaceae
|
| CEMOM4 | Cercocarpus montanus Raf. var. montanus | alderleaf mountain mahogany | Rosaceae
|
| CEMOP | Cercocarpus montanus Raf. var. paucidentatus (S. Wats.) F.L. Martin | hairy mountain mahogany | Rosaceae
|
| CEMOT | Cercocarpus montanus Raf. var. traskiae (Eastw.) F.L. Martin | Cercocarpus traskiae | Rosaceae
|
| CEMO2 | Cercocarpus montanus Raf. | alderleaf mountain mahogany | Rosaceae
|
| CETR4 | Cercocarpus traskiae Eastw. | Catalina Island mountain mahogany | Rosaceae
|
| CERCO | Cercocarpus Kunth | mountain mahogany | Rosaceae
|
| CEAL5 | Cerdana alliodora Ruiz & Pav�n | Cordia alliodora | Boraginaceae
|
| CECE3 | Cerefolium cerefolium (L.) Schinz & Thellung | Anthriscus cerefolium | Apiaceae
|
| CEBL | Cereus blankii Poselg. | Echinocereus berlandieri | Cactaceae
|
| CECO4 | Cereus coniflorus Weingart | Selenicereus coniflorus | Cactaceae
|
| CEDI8 | Cereus diguetii A. Weber | Peniocereus striatus | Cactaceae
|
| CEEM | Cereus emoryi Engelm. | Bergerocactus emoryi | Cactaceae
|
| CEERF | Cereus eriophorus N.E. Pfeiffer & Otto var. fragrans (Small) L. Benson | Harrisia fragrans | Cactaceae
|
| CEGI | Cereus giganteus Engelm. | Carnegia gigantea | Cactaceae
|
| CEGRA | Cereus gracilis P. Mill. var. aboriginus (Small) L. Benson | Harrisia aboriginum | Cactaceae
|
| CEGRS | Cereus gracilis P. Mill. var. simpsonii (Small) L. Benson | Harrisia simpsonii | Cactaceae
|
| CEGRA2 | Cereus grandiflorus (L.) P. Mill. var. armatus (K. Schum.) L. Benson | Selenicereus coniflorus | Cactaceae
|
| CEGR5 | Cereus grandiflorus (L.) P. Mill. | Selenicereus grandiflorus | Cactaceae
|
| CEGR8 | Cereus grantianus (Britt.) Kelsey & Dayton | Leptocereus grantianus | Cactaceae
|
| CEGRT | Cereus greggii Engelm. var. transmontanus Engelm. | Peniocereus greggii var. transmontanus | Cactaceae
|
| CEGR6 | Cereus greggii Engelm. | Peniocereus greggii var. greggii | Cactaceae
|
| CEHE3 | Cereus hexagonus (L.) P. Mill. | lady of the night cactus | Cactaceae
|
| CEHI3 | Cereus hildmannianus K. Schum. | hedge cactus | Cactaceae
|
| CEHY | Cereus hystrix (Haw.) P. Mill. | Stenocereus fimbriatus | Cactaceae
|
| CEIM2 | Cereus imbricatus Haw. | Opuntia imbricata var. imbricata | Cactaceae
|
| CEMA7 | Cereus martinii Labouret | Harrisia martinii | Cactaceae
|
| CEPER | Cereus pectinatus (Scheidw.) Engelm. var. rigidissimus Engelm. | Echinocereus rigidissimus | Cactaceae
|
| CEPE4 | Cereus pentagonus (L.) Haw. | Acanthocereus tetragonus | Cactaceae
|
| CEPE5 | Cereus peruvianus auct. non (L.) P. Mill. | Cereus hildmannianus | Cactaceae
|
| CEPO4 | Cereus portoricensis (Britt.) Urban | Harrisia portoricensis | Cactaceae
|
| CEPO | Cereus poselgeri (Lem.) Coult. | Echinocereus poselgeri | Cactaceae
|
| CEPT2 | Cereus pteranthus Link ex A. Dietr. | Selenicereus pteranthus | Cactaceae
|
| CEQU2 | Cereus quadricostatus Bello | Leptocereus quadricostatus | Cactaceae
|