| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| CASYA | Calamintha sylvatica Bromf. ssp. ascendens (Jord.) P.W. Ball | woodland calamint | Lamiaceae
|
| CASY6 | Calamintha sylvatica Bromf. | woodland calamint | Lamiaceae
|
| CAVU8 | Calamintha vulgaris (L.) Hal�csy non Clairv. | Clinopodium vulgare | Lamiaceae
|
| CALAM4 | Calamintha P. Mill. | calamint | Lamiaceae
|
| CADO7 | �Calammophila don-hensonii Reznicek & E.J. Judziewicz | Henson's calammophila | Poaceae
|
| CALAM6 | �Calammophila Brand | calammophila | Poaceae
|
| CAAR12 | Calamovilfa arcuata K.E. Rogers | Cumberland sandreed | Poaceae
|
| CABRC | Calamovilfa brevipilis (Torr.) Scribn. var. calvipes Fern. | Calamovilfa brevipilis | Poaceae
|
| CABRH | Calamovilfa brevipilis (Torr.) Scribn. var. heterolepis Fern. | Calamovilfa brevipilis | Poaceae
|
| CABR2 | Calamovilfa brevipilis (Torr.) Scribn. | pine barren sandreed | Poaceae
|
| CACU | Calamovilfa curtissii (Vasey) Scribn. | Florida sandreed | Poaceae
|
| CAGI3 | Calamovilfa gigantea (Nutt.) Scribn. & Merr. | giant sandreed | Poaceae
|
| CALOL2 | Calamovilfa longifolia (Hook.) Scribn. var. longifolia | prairie sandreed | Poaceae
|
| CALOM | Calamovilfa longifolia (Hook.) Scribn. var. magna Scribn. & Merr. | prairie sandreed | Poaceae
|
| CALO | Calamovilfa longifolia (Hook.) Scribn. | prairie sandreed | Poaceae
|
| CALAM2 | Calamovilfa (Gray) Hack. ex Scribn. & Southworth | sandreed | Poaceae
|
| CACA72 | Calamus caesius Blume | calamus | Arecaceae
|
| CADE28 | Calamus deerratus Mann & H. A. Wendl. | calamus | Arecaceae
|
| CARO32 | Calamus rotang L. | rattan | Arecaceae
|
| CALAM5 | Calamus L. | calamus | Arecaceae
|
| CAAM | Calandrinia ambigua (S. Wats.) T.J. Howell | Cistanthe ambigua | Portulacaceae
|
| CABR3 | Calandrinia breweri S. Wats. | Brewer's redmaids | Portulacaceae
|
| CACIM | Calandrinia ciliata (Ruiz & Pav�n) DC. var. menziesii (Hook.) J.F. Macbr. | Calandrinia ciliata | Portulacaceae
|
| CACI2 | Calandrinia ciliata (Ruiz & Pav�n) DC. | fringed redmaids | Portulacaceae
|
| CACO55 | Calandrinia cotyledon S. Wats. | Lewisia cotyledon var. cotyledon | Portulacaceae
|
| CAHO16 | Calandrinia howellii S. Wats. | Lewisia cotyledon var. howellii | Portulacaceae
|
| CALE36 | Calandrinia leeana Porter | Lewisia leeana | Portulacaceae
|
| CAMA2 | Calandrinia maritima Nutt. | Cistanthe maritima | Portulacaceae
|
| CAOP3 | Calandrinia oppositifolia S. Wats. | Lewisia oppositifolia | Portulacaceae
|
| CATW2 | Calandrinia tweedyi Gray | Cistanthe tweedyi | Portulacaceae
|
| CALAN | Calandrinia Kunth | redmaids | Portulacaceae
|
| CAHO25 | Calanthe hololeuca Reichenb. F. | | Orchidaceae
|
| CALAN3 | Calanthe R. Br. | | Orchidaceae
|
| CAAL13 | Calathea allouia (Aubl.) Lindl. | llerenes | Marantaceae
|
| CACR19 | Calathea crotalifera S. Wats. | rattlesnake plant | Marantaceae
|
| CALU11 | Calathea lutea (Aubl.) G.F.W. Mey. | pampano | Marantaceae
|
| CAZE | Calathea zebrina (Sims) Lindl. | zebraplant | Marantaceae
|
| CALAT | Calathea G.F.W. Mey. | calathea | Marantaceae
|
| CAMU26 | Calceolaria multiflora Cav. | slipper flower | Scrophulariaceae
|
| CAVE11 | Calceolaria verticillata (Ortega) Kuntze | Hybanthus verticillatus var. verticillatus | Violaceae
|
| CALCE2 | Calceolaria L. | slipper flower | Scrophulariaceae
|
| CAAS6 | Calea aspera Jacq. | Melanthera aspera var. aspera | Asteraceae
|
| CAOP4 | Calea oppositifolia L. | Isocarpha oppositifolia | Asteraceae
|
| CAAR | Calendula arvensis L. | field marigold | Asteraceae
|
| CAOF | Calendula officinalis L. | pot marigold | Asteraceae
|
| CALEN | Calendula L. | marigold | Asteraceae
|
| CAAS10 | Calenia aspidotum (Vainio) Vezda | Bullatina aspidota | Gomphillaceae
|
| CAIR | Calepina irregularis (Asso) Thellung | white ballmustard | Brassicaceae
|
| CALEP | Calepina Adans. | ballmustard | Brassicaceae
|
| CAPA61 | Calestania palustris (L.) K.-Pol. | Peucedanum palustre | Apiaceae
|
| CAPA47 | Calibrachoa parviflora (Juss.) D'Arcy | seaside petunia | Solanaceae
|
| CALIB | Calibrachoa Llave & Lex. | calibrachoa | Solanaceae
|
| CAAB12 | Calicium abietinum Pers. | spike lichen | Caliciaceae
|
| CAAD3 | Calicium adequatum Nyl. | adequate spike lichen | Caliciaceae
|
| CAAD4 | Calicium adspersum Pers. | spike lichen | Caliciaceae
|
| CAAL30 | Calicium albonigrum Nyl. | Mycocalicium albonigrum | Mycocaliciaceae
|
| CAAS11 | Calicium asikkalense Vainio | Chaenothecopsis pusilla | Mycocaliciaceae
|
| CACH26 | Calicium chlorosporum F. Wilson | spike lichen | Caliciaceae
|
| CACO62 | Calicium corynellum (Ach.) Ach. | spike lichen | Caliciaceae
|
| CACU16 | Calicium curtisii Tuck. | Phaeocalicium curtisii | Mycocaliciaceae
|
| CADI36 | Calicium disseminatum Ach. | Microcalicium disseminatum | Microcaliciaceae
|
| CAFL34 | Calicium floerkei Zahlbr. | Chaenothecopsis pusilla | Mycocaliciaceae
|
| CAFU6 | Calicium fuscipes Tuck. | Mycocalicium fuscipes | Mycocaliciaceae
|
| CAGL24 | Calicium glaucellum Ach. | spike lichen | Caliciaceae
|
| CAHE24 | Calicium hemisphaericum Howard | Calicium adequatum | Caliciaceae
|
| CAHY10 | Calicium hyperelloides Nyl. | spike lichen | Caliciaceae
|
| CAHY11 | Calicium hyperellum (Ach.) Ach. | Calicium viride | Caliciaceae
|
| CALE39 | Calicium lenticulare Ach. | spike lichen | Caliciaceae
|
| CALE40 | Calicium lentigerellum Tuck. | Calicium lenticulare | Caliciaceae
|
| CALE41 | Calicium leucochlorum Tuck. | spike lichen | Caliciaceae
|
| CALI27 | Calicium lichenoides (L.) Schumacher | Calicium salicinum | Caliciaceae
|
| CAMI41 | Calicium microcephalum (Sm.) Ach. | Sphinctrina anglica | Sphinctrinaceae
|
| CAMI42 | Calicium minutissimum G. Merr. | Stenocybe minutissima | Mycocaliciaceae
|
| CAPA63 | Calicium parvum Tibell | spike lichen | Caliciaceae
|
| CAPO16 | Calicium populneum Brond. ex Duby | Phaeocalicium populneum | Mycocaliciaceae
|
| CAPU36 | Calicium pusillum auct. | Chaenothecopsis pusilla | Mycocaliciaceae
|
| CAPU37 | Calicium pusiolum Ach. | Chaenothecopsis pusiola | Mycocaliciaceae
|
| CAQU8 | Calicium queenslandiae (F. Wilson) Tibell | Calicium chlorosporum | Caliciaceae
|
| CAQU6 | Calicium quercinum Pers. | spike lichen | Caliciaceae
|
| CARA17 | Calicium ravenelii Tuck. | Mycocalicium ravenelii | Mycocaliciaceae
|
| CAROT | Calicium roscidum (Ach.) Ach. var. trabinellum (Ach.) Schaerer | Calicium trabinellum | Caliciaceae
|
| CARO31 | Calicium roscidum (Ach.) Ach. | Calicium adspersum | Caliciaceae
|
| CASA21 | Calicium salicinum Pers. | spike lichen | Caliciaceae
|
| CASP25 | Calicium sphaerocephalum (L.) Ach. | Calicium salicinum | Caliciaceae
|
| CASU47 | Calicium subpusillum Vainio | Chaenothecopsis pusilla | Mycocaliciaceae
|
| CASU48 | Calicium subquercinum Asah. | Calicium lenticulare | Caliciaceae
|
| CASU49 | Calicium subtile Pers. | Mycocalicium subtile | Mycocaliciaceae
|
| CATR20 | Calicium trabinellum (Ach.) Ach. | spike lichen | Caliciaceae
|
| CATR25 | Calicium trachelinum Ach. | Calicium salicinum | Caliciaceae
|
| CAVI16 | Calicium viride Pers. | spike lichen | Caliciaceae
|
| CALIC | Calicium Pers. | spike lichen | Caliciaceae
|
| CAAE7 | Calla aethiopica L. | Zantedeschia aethiopica | Araceae
|
| CAPA | Calla palustris L. | water arum | Araceae
|
| CAPI12 | Calla picta Roxb. | Aglaonema pictum | Araceae
|
| CALLA | Calla L. | callalily | Araceae
|
| CAMA45 | Callaeum ?macropterum (DC.) D.M. Johnson | hillyhock | Malpighiaceae
|
| CALLA2 | Callaeum Small | callaeum | Malpighiaceae
|
| CABI | Calliandra biflora Tharp | twoflower stickpea | Fabaceae
|
| CACO | Calliandra conferta Benth. | Rio Grande stickpea | Fabaceae
|
| CACO43 | Calliandra coulteri S. Wats. | Coulter's stickpea | Fabaceae
|
| CACU17 | Calliandra cumingii Benth. | Cuming's stickpea | Fabaceae
|