| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| CHVA3 | Chenopodium ×variabile Aellen | | Chenopodiaceae
|
| CHVI15 | Chenopodium virgatum (L.) Ambrosi, non Thunb. | Chenopodium foliosum | Chenopodiaceae
|
| CHVI21 | Chenopodium viride L. | Chenopodium opulifolium | Chenopodiaceae
|
| CHVU | Chenopodium vulvaria L. | stinking goosefoot | Chenopodiaceae
|
| CHWA | Chenopodium watsonii A. Nels. | Watson's goosefoot | Chenopodiaceae
|
| CHWO2 | Chenopodium wolfii Rydb. | Chenopodium atrovirens | Chenopodiaceae
|
| CHENO | Chenopodium L. | goosefoot | Chenopodiaceae
|
| CHPU6 | Chetyson pulchella (Michx.) A.& D. Löve | Sedum pulchellum | Crassulaceae
|
| CHVI16 | Chetyson vigilimontis (Small) A.& D. Löve | Sedum pulchellum | Crassulaceae
|
| CHOL2 | Chilianthus oleaceus Burchell | Buddleja saligna | Buddlejaceae
|
| CHLIA | Chilopsis linearis (Cav.) Sweet ssp. arcuata (Fosberg) Henrickson | desert willow | Bignoniaceae
|
| CHLIL2 | Chilopsis linearis (Cav.) Sweet ssp. linearis | desert willow | Bignoniaceae
|
| CHLIA2 | Chilopsis linearis (Cav.) Sweet var. arcuata Fosberg | Chilopsis linearis ssp. arcuata | Bignoniaceae
|
| CHLIG | Chilopsis linearis (Cav.) Sweet var. glutinosa (Engelm.) Fosberg | Chilopsis linearis ssp. linearis | Bignoniaceae
|
| CHLIO | Chilopsis linearis (Cav.) Sweet var. originaria Fosberg | Chilopsis linearis ssp. linearis | Bignoniaceae
|
| CHLI2 | Chilopsis linearis (Cav.) Sweet | desert willow | Bignoniaceae
|
| CHILO | Chilopsis D. Don | desert willow | Bignoniaceae
|
| CHGE5 | Chiloscyphus gemmiparus A. Evans | | Geocalycaceae
|
| CHPAF2 | Chiloscyphus pallescens (Ehrh. ex Hoffm.) Dumort. var. fragilis (Roth) Müll. Frib. | | Geocalycaceae
|
| CHPAP3 | Chiloscyphus pallescens (Ehrh. ex Hoffm.) Dumort. var. pallescens | | Geocalycaceae
|
| CHPA43 | Chiloscyphus pallescens (Ehrh. ex Hoffm.) Dumort. | | Geocalycaceae
|
| CHPOP7 | Chiloscyphus polyanthos (L.) Corda var. polyanthos | | Geocalycaceae
|
| CHPOR | Chiloscyphus polyanthos (L.) Corda var. rivularis (Schrad.) Nees | | Geocalycaceae
|
| CHPO14 | Chiloscyphus polyanthos (L.) Corda | | Geocalycaceae
|
| CHILO2 | Chiloscyphus Corda nom.cons. | | Geocalycaceae
|
| CHCO22 | Chimaphila corymbosa Pursh | Chimaphila umbellata ssp. cisatlantica | Pyrolaceae
|
| CHMAD | Chimaphila maculata (L.) Pursh var. dasystemma (Torr.) Kearney & Peebles | Chimaphila maculata | Pyrolaceae
|
| CHMA3 | Chimaphila maculata (L.) Pursh | striped prince's pine | Pyrolaceae
|
| CHME | Chimaphila menziesii (R. Br. ex D. Don) Spreng. | little prince's pine | Pyrolaceae
|
| CHOC2 | Chimaphila occidentalis Rydb. | Chimaphila umbellata ssp. occidentalis | Pyrolaceae
|
| CHUMA | Chimaphila umbellata (L.) W. Bart. ssp. acuta (Rydb.) Hultén | pipsissewa | Pyrolaceae
|
| CHUMC2 | Chimaphila umbellata (L.) W. Bart. ssp. cisatlantica (Blake) Hultén | pipsissewa | Pyrolaceae
|
| CHUMO2 | Chimaphila umbellata (L.) W. Bart. ssp. occidentalis (Rydb.) Hultén | pipsissewa | Pyrolaceae
|
| CHUMA2 | Chimaphila umbellata (L.) W. Bart. var. acuta (Rydb.) Blake | Chimaphila umbellata ssp. acuta | Pyrolaceae
|
| CHUMC | Chimaphila umbellata (L.) W. Bart. var. cisatlantica Blake | Chimaphila umbellata ssp. cisatlantica | Pyrolaceae
|
| CHUMO | Chimaphila umbellata (L.) W. Bart. var. occidentalis (Rydb.) Blake | Chimaphila umbellata ssp. occidentalis | Pyrolaceae
|
| CHUM | Chimaphila umbellata (L.) W. Bart. | pipsissewa | Pyrolaceae
|
| CHIMA | Chimaphila Pursh | prince's pine | Pyrolaceae
|
| CHAL8 | Chiococca alba (L.) A.S. Hitchc. | West Indian milkberry | Rubiaceae
|
| CHPA17 | Chiococca parvifolia Wullschl. ex Griseb. | pineland milkberry | Rubiaceae
|
| CHPI4 | Chiococca pinetorum Britt. ex Millsp. | Chiococca parvifolia | Rubiaceae
|
| CHRA6 | Chiococca racemosa L. | Chiococca alba | Rubiaceae
|
| CHIOC | Chiococca P. Br. | milkberry | Rubiaceae
|
| CHIN19 | Chiodecton inscriptum (Nyl.) Fink | Sclerophyton inscriptum | Opegraphaceae
|
| CHMA16 | Chiodecton malmei Thor | | Opegraphaceae
|
| CHMO9 | Chiodecton montagnaei Tuck. | Cryptothecia striata | Arthoniaceae
|
| CHOC4 | Chiodecton ochroleucum Zahlbr. | | Opegraphaceae
|
| CHPE11 | Chiodecton perplexum Nyl. | | Opegraphaceae
|
| CHRU7 | Chiodecton rubrocinctum (Ehrenb.:Fr.) Nyl. | Cryptothecia rubrocincta | Arthoniaceae
|
| CHSA8 | Chiodecton sanguineum (Sw.) Vainio | Cryptothecia rubrocincta | Arthoniaceae
|
| CHSP8 | Chiodecton sphaerale Ach. | | Opegraphaceae
|
| CHSU15 | Chiodecton subochroleucum Fink | | Opegraphaceae
|
| CHIOD | Chiodecton Ach. | chiodecton | Opegraphaceae
|
| CHHI6 | Chiogenes hispidula (L.) Torr. & Gray | Gaultheria hispidula | Ericaceae
|
| CHAX2 | Chionanthus axilliflorus (Griseb.) Stearn | hueso | Oleaceae
|
| CHCA27 | Chionanthus caribaeus Jacq. | Chionanthus compactus | Oleaceae
|
| CHCO12 | Chionanthus compactus Sw. | bridgotree | Oleaceae
|
| CHDO4 | Chionanthus domingensis Lam. | white rosewood | Oleaceae
|
| CHHO4 | Chionanthus holdridgei (Camp & Monachino) Stearn | hueso prieto | Oleaceae
|
| CHLI6 | Chionanthus ligustrinus (Sw.) Pers. | cabra blanca | Oleaceae
|
| CHPY2 | Chionanthus pygmaeus Small | pygmy fringetree | Oleaceae
|
| CHVIM | Chionanthus virginicus L. var. maritimus Pursh | Chionanthus virginicus | Oleaceae
|
| CHVI3 | Chionanthus virginicus L. | white fringetree | Oleaceae
|
| CHION | Chionanthus L. | fringetree | Oleaceae
|
| CHSE5 | Chione seminervis Urban & Ekman | puntaj jayuya | Rubiaceae
|
| CHVE4 | Chione venosa (Sw.) Urban | fatpork | Rubiaceae
|
| CHION3 | Chione DC. | chione | Rubiaceae
|
| CHLU2 | Chionodoxa luciliae Boiss. | glory of the snow | Liliaceae
|
| CHSA11 | Chionodoxa sardensis Whittall ex Barr & Sugden | glory-of-the-snow | Liliaceae
|
| CHION4 | Chionodoxa Boiss. | chionodoxa | Liliaceae
|
| CHJA | Chionophila jamesii Benth. | Rocky Mountain snowlover | Scrophulariaceae
|
| CHTW | Chionophila tweedyi (Canby & Rose) Henderson | Tweedy's snowlover | Scrophulariaceae
|
| CHION2 | Chionophila Benth. | snowlover | Scrophulariaceae
|
| CHAP | Chionosphaera apobasidialis Cox | | Chionosphaeraceae
|
| CHION5 | Chionosphaera Cox | chionosphaera | Chionosphaeraceae
|
| CHPE13 | Chiranthodendron pentadactylon Larreat. | Mexican-hat-plant | Sterculiaceae
|
| CHIRA | Chiranthodendron Cerv. ex Cav. | chiranthodendron | Sterculiaceae
|
| CHDO5 | Chironia dodecandra L. | Sabatia dodecandra var. dodecandra | Gentianaceae
|
| CHSP11 | Chloracantha spinosa (Benth.) Nesom | spiny chloracantha | Asteraceae
|
| CHLOR6 | Chloracantha Nesom | chloracantha | Asteraceae
|
| CHAN | Chloris andropogonoides Fourn. | slimspike wind millgrass | Poaceae
|
| CHAR10 | Chloris argentina (Hack.) Lillo & Parodi | Eustachys retusa | Poaceae
|
| CHBA8 | Chloris barbata (L.) Nash, non Sw. | Chloris elata | Poaceae
|
| CHBA10 | Chloris barbata Sw. | swollen fingergrass | Poaceae
|
| CHBR12 | Chloris ×brevispica Nash | | Poaceae
|
| CHCAC5 | Chloris canterai Arech. var. canterai | Paraguayan windmill grass | Poaceae
|
| CHCAG3 | Chloris canterai Arech. var. grandiflora (Roseng. & Izag.) D.E. Anderson | Paraguayan windmill grass | Poaceae
|
| CHCA6 | Chloris canterai Arech. | Paraguayan windmill grass | Poaceae
|
| CHCA13 | Chloris capensis auct. non (Houtt.) Thellung | Eustachys caribaea | Poaceae
|
| CHCA81 | Chloris caribaea Spreng. | Eustachys caribaea | Poaceae
|
| CHCH2 | Chloris chloridea (J. Presl) A.S. Hitchc. | Enteropogon chlorideus | Poaceae
|
| CHCI | Chloris ciliata Sw. | fringed windmill grass | Poaceae
|
| CHCR | Chloris crinita Lag. | false Rhodes grass | Poaceae
|
| CHCU6 | Chloris cubensis A.S. Hitchc. & Ekman ex A.S. Hitchc. | Cuban windmill grass | Poaceae
|
| CHCU2 | Chloris cucullata Bisch. | hooded windmill grass | Poaceae
|
| CHCU8 | Chloris curtipendula Michx. | Bouteloua curtipendula var. curtipendula | Poaceae
|
| CHCY2 | Chloris cynodontioides Balansa | Chloris divaricata | Poaceae
|
| CHDA | Chloris dandyana C.D. Adams | Chloris elata | Poaceae
|
| CHDI | Chloris distichophylla Lag. | Eustachys distichophylla | Poaceae
|
| CHDIC | Chloris divaricata R. Br. var. cynodontioides (Balansa) Lazarides | Chloris divaricata | Poaceae
|
| CHDI2 | Chloris divaricata R. Br. | spreading windmill grass | Poaceae
|