| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| CRFA3 | Crossandra fascicularis Benth. | Stenandrium dulce | Acanthaceae
|
| CRNI7 | Crossandra nilotica Oliv. | | Acanthaceae
|
| CROSS5 | Crossandra Salisb. | crossandra | Acanthaceae
|
| CRAB6 | Crossidium aberrans Holz. & Bartr. | crossidium moss | Pottiaceae
|
| CRCH11 | Crossidium chloronotos (Brid.) Limpr. | Crossidium squamiferum var. squamiferum | Pottiaceae
|
| CRCR11 | Crossidium crassinerve (De Not.) Jur. | crossidium moss | Pottiaceae
|
| CRDE12 | Crossidium desertorum Holz. & Bartr. | Crossidium crassinerve | Pottiaceae
|
| CRER5 | Crossidium erosum Holz. & Bartr. | Crossidium crassinerve | Pottiaceae
|
| CRGR15 | Crossidium griseum (Jur.) Jur. | Crossidium squamiferum var. pottioideum | Pottiaceae
|
| CRRO13 | Crossidium rosei Williams | Rose crossidium moss | Pottiaceae
|
| CRSE10 | Crossidium seriatum Crum & Steere | crossidium moss | Pottiaceae
|
| CRSP8 | Crossidium spatulaefolium Holz. & Bartr. | Crossidium aberrans | Pottiaceae
|
| CRSQP | Crossidium squamiferum (Viv.) Jur. var. pottioideum (De Not.) M�nk. | crossidium moss | Pottiaceae
|
| CRSQS | Crossidium squamiferum (Viv.) Jur. var. squamiferum | crossidium moss | Pottiaceae
|
| CRSQ | Crossidium squamiferum (Viv.) Jur. | crossidium moss | Pottiaceae
|
| CRSU17 | Crossidium succulentum Holz. & Bartr. | Crossidium squamiferum var. pottioideum | Pottiaceae
|
| CROSS4 | Crossidium Jur. | crossidium moss | Pottiaceae
|
| CRFL13 | Crossopetalum floridanum J.R. Gardner | Crossopetalum ilicifolium | Celastraceae
|
| CRIL2 | Crossopetalum ilicifolium (Poir.) Kuntze | christmasberry | Celastraceae
|
| CRRH | Crossopetalum rhacoma Crantz | maidenberry | Celastraceae
|
| CROSS | Crossopetalum P. Br. | crossopetalum | Celastraceae
|
| CRBIB | Crossosoma bigelovii S. Wats. var. bigelovii | ragged rockflower | Crossosomataceae
|
| CRBIG | Crossosoma bigelovii S. Wats. var. glaucum (Small) Kearney & Peebles | ragged rockflower | Crossosomataceae
|
| CRBI2 | Crossosoma bigelovii S. Wats. | ragged rockflower | Crossosomataceae
|
| CRCA4 | Crossosoma californicum Nutt. | California rockflower | Crossosomataceae
|
| CRGL8 | Crossosoma glaucum Small | Crossosoma bigelovii var. glaucum | Crossosomataceae
|
| CRPA4 | Crossosoma parviflorum B.L. Robins. & Fern. | Crossosoma bigelovii var. bigelovii | Crossosomataceae
|
| CROSS2 | Crossosoma Nutt. | rockflower | Crossosomataceae
|
| CRAG2 | Crotalaria agatiflora Schweinf. | canarybird-bush | Fabaceae
|
| CRAL12 | Crotalaria alata Buch.-Ham. ex D. Don | rattlebox | Fabaceae
|
| CRAL6 | Crotalaria alba L. | Baptisia alba var. alba | Fabaceae
|
| CRAN12 | Crotalaria angulata auct. non P. Mill. | Crotalaria rotundifolia | Fabaceae
|
| CRAS2 | Crotalaria assamica Benth. | Indian rattlebox | Fabaceae
|
| CRAV | Crotalaria avonensis K.R. DeLaney & Wunderlin | Avon Park rattlebox | Fabaceae
|
| CRBE8 | Crotalaria berteriana DC. | Berteron's rattlebox | Fabaceae
|
| CRBI8 | Crotalaria biflora L. | twoflower rattlebox | Fabaceae
|
| CRBRB | Crotalaria brevidens Benth. var. brevidens | Ethiopian rattlebox | Fabaceae
|
| CRBRI | Crotalaria brevidens Benth. var. intermedia (Kotschy) Polhill | Ethiopian rattlebox | Fabaceae
|
| CRBR8 | Crotalaria brevidens Benth. | Ethiopian rattlebox | Fabaceae
|
| CRBR16 | Crotalaria breviflora DC. | shortflower rattlebox | Fabaceae
|
| CRFA80 | Crotalaria falcata Vahl ex DC. | Crotalaria pallida var. obovata | Fabaceae
|
| CRGR16 | Crotalaria grantiana Harvey | Crotalaria virgulata ssp. grantiana | Fabaceae
|
| CRIN5 | Crotalaria incana L. | shakeshake | Fabaceae
|
| CRIN25 | Crotalaria intermedia Kotschy | Crotalaria brevidens var. intermedia | Fabaceae
|
| CRJU | Crotalaria juncea L. | sunn hemp | Fabaceae
|
| CRLA7 | Crotalaria lanceolata E. Mey. | lanceleaf rattlebox | Fabaceae
|
| CRLI11 | Crotalaria linaria Small | Crotalaria rotundifolia | Fabaceae
|
| CRLO3 | Crotalaria longirostrata Hook. & Arn. | longbeak rattlebox | Fabaceae
|
| CRLOE | Crotalaria lotifolia L. var. eggersii Senn | Crotalaria lotifolia | Fabaceae
|
| CRLO4 | Crotalaria lotifolia L. | cascabelillo axilar | Fabaceae
|
| CRMAL | Crotalaria maritima Chapman var. linaria (Small) Senn | Crotalaria rotundifolia | Fabaceae
|
| CRMA18 | Crotalaria maritima Chapman | Crotalaria rotundifolia | Fabaceae
|
| CRMI9 | Crotalaria micans Link | Caracas rattlebox | Fabaceae
|
| CRMU5 | Crotalaria mucronata Desv. | Crotalaria pallida var. obovata | Fabaceae
|
| CRMY | Crotalaria mysorensis Roth | rattlebox | Fabaceae
|
| CROC80 | Crotalaria ochroleuca G. Don | slender leaf rattlebox | Fabaceae
|
| CRPAO | Crotalaria pallida Ait. var. obovata (G. Don) Polhill | smooth rattlebox | Fabaceae
|
| CRPA10 | Crotalaria pallida Ait. | smooth rattlebox | Fabaceae
|
| CRPA22 | Crotalaria paulina Schrank | rattlebox | Fabaceae
|
| CRPU4 | Crotalaria pumila Ortega | low rattlebox | Fabaceae
|
| CRPUB | Crotalaria purshii DC. var. bracteolifera Fern. | Crotalaria purshii | Fabaceae
|
| CRPU5 | Crotalaria purshii DC. | Pursh's rattlebox | Fabaceae
|
| CRRE4 | Crotalaria retusa L. | rattleweed | Fabaceae
|
| CRRE10 | Crotalaria retzii A.S. Hitchc. | Crotalaria spectabilis | Fabaceae
|
| CRROV | Crotalaria rotundifolia Walt. ex J.F. Gmel. var. vulgaris Windler | Crotalaria rotundifolia | Fabaceae
|
| CRRO5 | Crotalaria rotundifolia Walt. ex J.F. Gmel. | rabbitbells | Fabaceae
|
| CRSAB | Crotalaria sagittalis L. var. blumeriana Senn | Crotalaria sagittalis | Fabaceae
|
| CRSAF | Crotalaria sagittalis L. var. fruticosa (P. Mill.) Fawcett & Rendle | Crotalaria sagittalis | Fabaceae
|
| CRSAO | Crotalaria sagittalis L. var. oblonga Michx. | Crotalaria sagittalis | Fabaceae
|
| CRSA4 | Crotalaria sagittalis L. | arrowhead rattlebox | Fabaceae
|
| CRSA8 | Crotalaria saltiana Andr. | African rattlebox | Fabaceae
|
| CRSP2 | Crotalaria spectabilis Roth | showy rattlebox | Fabaceae
|
| CRSTS2 | Crotalaria stipularia Desv. var. serpyllifolia DC. | Crotalaria stipularia | Fabaceae
|
| CRST4 | Crotalaria stipularia Desv. | cascabelillo alado | Fabaceae
|
| CRST7 | Crotalaria striata DC. | Crotalaria pallida var. obovata | Fabaceae
|
| CRUS80 | Crotalaria usaramoensis E.G. Baker | Crotalaria zanzibarica | Fabaceae
|
| CRVE5 | Crotalaria verrucosa L. | blue rattlesnake | Fabaceae
|
| CRVIG | Crotalaria virgulata Klotzsch ssp. grantiana (Harvey) Polhill | Grant's rattlebox | Fabaceae
|
| CRVI14 | Crotalaria virgulata Klotzsch | | Fabaceae
|
| CRVI13 | Crotalaria vitellina Ker Gawler | rattlebox | Fabaceae
|
| CRZA80 | Crotalaria zanzibarica Benth. | West Indian rattlebox | Fabaceae
|
| CROTA | Crotalaria L. | rattlebox | Fabaceae
|
| CRALA | Croton alabamensis E.A. Sm. ex Chapman var. alabamensis | Alabama croton | Euphorbiaceae
|
| CRALT | Croton alabamensis E.A. Sm. ex Chapman var. texensis Ginzbarg | Alabama croton | Euphorbiaceae
|
| CRAL3 | Croton alabamensis E.A. Sm. ex Chapman | Alabama croton | Euphorbiaceae
|
| CRAR3 | Croton arenicola Small | Croton glandulosus var. glandulosus | Euphorbiaceae
|
| CRAR5 | Croton argenteus L. | silver July croton | Euphorbiaceae
|
| CRAR2 | Croton argyranthemus Michx. | healing croton | Euphorbiaceae
|
| CRAS3 | Croton astroites Ait. | wild marrow | Euphorbiaceae
|
| CRBE3 | Croton berlandieri Torr. | Croton humilis | Euphorbiaceae
|
| CRBE4 | Croton betulinus Vahl | beechleaf croton | Euphorbiaceae
|
| CRBO4 | Croton bonplandianus Baill. | Bonpland's croton | Euphorbiaceae
|
| CRCAC | Croton californicus Muell.-Arg. var. californicus | California croton | Euphorbiaceae
|
| CRCAL | Croton californicus Muell.-Arg. var. longipes (M.E. Jones) Ferguson | Croton californicus var. californicus | Euphorbiaceae
|
| CRCAM | Croton californicus Muell.-Arg. var. mohavensis Ferguson | Croton californicus var. californicus | Euphorbiaceae
|
| CRCAT | Croton californicus Muell.-Arg. var. tenuis (S. Wats.) Ferguson | California croton | Euphorbiaceae
|
| CRCA5 | Croton californicus Muell.-Arg. | California croton | Euphorbiaceae
|
| CRCAA | Croton capitatus Michx. var. albinoides (Ferguson) Shinners | Croton capitatus var. lindheimeri | Euphorbiaceae
|
| CRCAC2 | Croton capitatus Michx. var. capitatus | hogwort | Euphorbiaceae
|
| CRCAL2 | Croton capitatus Michx. var. lindheimeri (Engelm. & Gray) Muell.-Arg. | Lindheimer's hogwort | Euphorbiaceae
|
| CRCA6 | Croton capitatus Michx. | hogwort | Euphorbiaceae
|