| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| CAGL25 | Catapyrenium globosum J. W. Thomson | globe earth lichen | Verrucariaceae
|
| CAGR29 | Catapyrenium granulosum (de Lesd.) J. W. Thomson | granule earth lichen | Verrucariaceae
|
| CAHE23 | Catapyrenium heppioides (Zahlbr.) J. W. Thomson | earth lichen | Verrucariaceae
|
| CALA60 | Catapyrenium lachneum (Ach.) R. Sant. | earth lichen | Verrucariaceae
|
| CAMI40 | Catapyrenium michelii (A. Massal.) R. Sant. | Michel's earth lichen | Verrucariaceae
|
| CANO7 | Catapyrenium norvegicum Breuss | earth lichen | Verrucariaceae
|
| CAPL15 | Catapyrenium plumbeum (de Lesd.) J. W. Thomson | earth lichen | Verrucariaceae
|
| CAPO19 | Catapyrenium podolepis Breuss | earth lichen | Verrucariaceae
|
| CAPS11 | Catapyrenium psoromoides (Borrer) R. Sant. | earth lichen | Verrucariaceae
|
| CARU21 | Catapyrenium rufescens (Ach.) Breuss | earth lichen | Verrucariaceae
|
| CASC39 | Catapyrenium schaereri (Fr.) R. Sant. | earth lichen | Verrucariaceae
|
| CASQ4 | Catapyrenium squamellum (Nyl.) J. W. Thomson | earth lichen | Verrucariaceae
|
| CASQ5 | Catapyrenium squamulosum (Ach.) Breuss | earth lichen | Verrucariaceae
|
| CATU11 | Catapyrenium tuckermanii (Rav. ex Mont.) J. W. Thomson | Tuckerman's earth lichen | Verrucariaceae
|
| CAUM6 | Catapyrenium umbrinum Breuss | earth lichen | Verrucariaceae
|
| CAWA6 | Catapyrenium waltheri (Krempelh.) Korber | earth lichen | Verrucariaceae
|
| CAZA2 | Catapyrenium zahlbruckneri (Hasse) J. W. Thomson | Zahlbruckner's earth lichen | Verrucariaceae
|
| CATAP2 | Catapyrenium Flotow | earth lichen | Verrucariaceae
|
| CATAS2 | Catasetum Rich. ex Kunth | catasetum | Orchidaceae
|
| CAME19 | Catesbaea melanocarpa Urban | tropical lilythorn | Rubiaceae
|
| CAPA43 | Catesbaea parviflora Sw. | smallflower lilythorn | Rubiaceae
|
| CATES | Catesbaea L. | lilythorn | Rubiaceae
|
| CAED7 | Catha edulis (Vahl) Forsskal ex Endl. | khat | Celastraceae
|
| CATHA2 | Catha Forsskal ex Scop. | catha | Celastraceae
|
| CARO14 | Catharanthus roseus (L.) G. Don | Madagascar periwinkle | Apocynaceae
|
| CATHA | Catharanthus G. Don | periwinkle | Apocynaceae
|
| CAAL24 | Cathartolinum alatum Small | Linum alatum | Linaceae
|
| CAAR23 | Cathartolinum arenicola Small | Linum arenicola | Linaceae
|
| CAAR40 | Cathartolinum aristatum (Engelm.) Small | Linum aristatum | Linaceae
|
| CAAU12 | Cathartolinum australe (Heller) Small | Linum australe var. australe | Linaceae
|
| CABE10 | Cathartolinum berlandieri (Hook.) Small | Linum berlandieri var. berlandieri | Linaceae
|
| CACA53 | Cathartolinum carteri (Small) Small | Linum carteri var. carteri | Linaceae
|
| CACA55 | Cathartolinum catharticum (L.) Small | Linum catharticum | Linaceae
|
| CACO46 | Cathartolinum compactum (A. Nels.) Small | Linum compactum | Linaceae
|
| CACU12 | Cathartolinum curtissii (Small) Small | Linum medium var. texanum | Linaceae
|
| CAEA3 | Cathartolinum earlei Small | Linum rigidum var. rigidum | Linaceae
|
| CAEL12 | Cathartolinum elongatum Small | Linum elongatum | Linaceae
|
| CAFL29 | Cathartolinum floridanum (Planch.) Small | Linum floridanum var. floridanum | Linaceae
|
| CAHA25 | Cathartolinum harperi (Small) Small | Linum sulcatum var. harperi | Linaceae
|
| CAIN34 | Cathartolinum intercursum (Bickn.) Small | Linum intercursum | Linaceae
|
| CAKI2 | Cathartolinum kingii (S. Wats.) Small | Linum kingii | Linaceae
|
| CAMA26 | Cathartolinum macrosepalum Small | Linum floridanum var. floridanum | Linaceae
|
| CAME26 | Cathartolinum medium (Planch.) Small | Linum medium var. medium | Linaceae
|
| CAMU17 | Cathartolinum multicaule (Hook.) Small | Linum imbricatum | Linaceae
|
| CANE23 | Cathartolinum neomexicanum (Greene) Small | Linum neomexicanum | Linaceae
|
| CAPU29 | Cathartolinum puberulum (Engelm.) Small | Linum puberulum | Linaceae
|
| CARI10 | Cathartolinum rigidum (Pursh) Small | Linum rigidum var. rigidum | Linaceae
|
| CASA16 | Cathartolinum sanctum (Small) Small | Linum berlandieri var. berlandieri | Linaceae
|
| CASE25 | Cathartolinum sedoides (Porter) Small | Linum kingii | Linaceae
|
| CAST31 | Cathartolinum striatum (Walt.) Small | Linum striatum | Linaceae
|
| CASU28 | Cathartolinum sulcatum (Riddell) Small | Linum sulcatum var. sulcatum | Linaceae
|
| CAVE12 | Cathartolinum vernale (Woot.) Small | Linum vernale | Linaceae
|
| CAVI15 | Cathartolinum virginianum (L.) Reichenb. | Linum virginianum | Linaceae
|
| CAER2 | Cathestecum erectum Vasey & Hack. | false grama | Poaceae
|
| CATHE | Cathestecum J. Presl | false grama | Poaceae
|
| CAAR39 | Catillaria arctica Lynge | Toninia philippea | Catillariaceae
|
| CAAT23 | Catillaria athallina (Hepp) Hellbom | Toninia athallina | Catillariaceae
|
| CAAT24 | Catillaria atropurpurea (Schaerer) Th. Fr. | Catinaria atropurpurea | Bacidiaceae
|
| CABA20 | Catillaria bahusiensis (Blomb.) Th. Fr. | Tylothallia biformigera | Lecanoraceae
|
| CABI16 | Catillaria biformigera (Leighton) H. Magn. | Tylothallia biformigera | Lecanoraceae
|
| CABO16 | Catillaria bouteillei (Desmaz.) Zahlbr. | Fellhanera bouteillei | Pilocarpaceae
|
| CACH28 | Catillaria chalybeia (Borrer) A. Massal. | | Catillariaceae
|
| CACO66 | Catillaria columbiana (G. Merr.) W. Noble | Megalaria columbiana | Lecanoraceae
|
| CACR25 | Catillaria crystallifera R. Kilias | Toninia lutosa | Catillariaceae
|
| CACU15 | Catillaria cupressi Zahlbr. | | Catillariaceae
|
| CAEN5 | Catillaria endochroma (Fee) Zahlbr. | | Catillariaceae
|
| CAFL33 | Catillaria flavens (Willey) Fink | | Catillariaceae
|
| CAFR18 | Catillaria franciscana (Tuck.) Herre | | Catillariaceae
|
| CAGL26 | Catillaria glauconigrans (Tuck.) Hasse | | Catillariaceae
|
| CAGL27 | Catillaria globulosa (Florke) Th. Fr. | | Catillariaceae
|
| CAGR30 | Catillaria graniformis (K. Hagen) Vainio | Cliostomum corrugatum | Bacidiaceae
|
| CAGR31 | Catillaria griffithii (Sm.) Malme | Cliostomum griffithii | Bacidiaceae
|
| CAGR32 | Catillaria groenlandica Lynge | Lecania groenlandica | Bacidiaceae
|
| CAGR33 | Catillaria grossa (Pers. ex Nyl.) Korber | Megalaria grossa | Lecanoraceae
|
| CAHE26 | Catillaria heeri (Hepp) H. Olivier | | Catillariaceae
|
| CAJE4 | Catillaria jemtlandica Th. Fr. & Almq. | | Catillariaceae
|
| CAKA10 | Catillaria kansuensis H. Magn. | Toninia philippea | Catillariaceae
|
| CALA66 | Catillaria laureri Hepp ex Th. Fr. | Megalaria laureri | Lecanoraceae
|
| CALE42 | Catillaria lenticularis (Ach.) Th. Fr. | | Catillariaceae
|
| CALE43 | Catillaria leptocheila (Tuck.) Riddle | | Catillariaceae
|
| CAMI43 | Catillaria micrococca (Korber) Th. Fr. | Micarea prasina | Micareaceae
|
| CAMU20 | Catillaria muscicola Lynge | | Catillariaceae
|
| CANI13 | Catillaria nigroclavata (Nyl.) Schuler | | Catillariaceae
|
| CAPR18 | Catillaria prasina (Fr.) Th. Fr. | Micarea prasina | Micareaceae
|
| CAPU35 | Catillaria pulverea (Borrer) Lettau | Megalaria pulverea | Lecanoraceae
|
| CASC27 | Catillaria sculptruata H. Magn. | Toninia sculpturata | Catillariaceae
|
| CASP27 | Catillaria sphaeroides (A. Massal.) Schuler | Mycobilimbia sphaeroides | Porpidiaceae
|
| CASU42 | Catillaria subnegans (Nyl.) Boistel | | Catillariaceae
|
| CASU54 | Catillaria subnitida Hellbom | Catillaria tristis | Catillariaceae
|
| CASU43 | Catillaria subviridis (Nyl.) Zahlbr. | | Catillariaceae
|
| CASU65 | Catillaria superflua (Mull. Arg.) Zahlbr. | Megalaria grossa | Lecanoraceae
|
| CATE23 | Catillaria terrena (Willey) Zahlbr. | | Catillariaceae
|
| CATR26 | Catillaria tricolor auct. | Cliostomum griffithii | Bacidiaceae
|
| CATR23 | Catillaria tristis (Mull. Arg.) Arnold | | Catillariaceae
|
| CATIL | Catillaria A. Massal. | catillaria | Catillariaceae
|
| CASP15 | Catimbium speciosum (Wendl.) Holttum | Alpinia zerumbet | Zingiberaceae
|
| CAAL29 | Catinaria albocincta Degel. | Megalaria albocincta | Lecanoraceae
|
| CAAT22 | Catinaria atropurpurea (Schaerer) Vezda & Poelt | | Bacidiaceae
|
| CAGR34 | Catinaria grossa (Pers. ex Nyl.) Vainio | Megalaria grossa | Lecanoraceae
|
| CALA63 | Catinaria laureri (Hepp ex Th. Fr.) Degel. | Megalaria laureri | Lecanoraceae
|
| CALE46 | Catinaria leucoplaca auct. | Megalaria grossa | Lecanoraceae
|