| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| CHRE4 | Chamaesyce revoluta (Engelm.) Small | threadstem sandmat | Euphorbiaceae
|
| CHROG | Chamaesyce rockii (Forbes) Croizat & Deg. var. grandifolia (Hbd.) Koutnik | Chamaesyce herbstii | Euphorbiaceae
|
| CHRO2 | Chamaesyce rockii (Forbes) Croizat & Deg. | Koolau Range sandmat | Euphorbiaceae
|
| CHSC7 | Chamaesyce scoparia Small | Chamaesyce porteriana var. scoparia | Euphorbiaceae
|
| CHSE4 | Chamaesyce serpens (Kunth) Small | matted sandmat | Euphorbiaceae
|
| CHSEH | Chamaesyce serpyllifolia (Pers.) Small ssp. hirtella (Engelm. ex S. Wats.) Koutnik | thymeleaf sandmat | Euphorbiaceae
|
| CHSES | Chamaesyce serpyllifolia (Pers.) Small ssp. serpyllifolia | thymeleaf sandmat | Euphorbiaceae
|
| CHSE6 | Chamaesyce serpyllifolia (Pers.) Small | thymeleaf sandmat | Euphorbiaceae
|
| CHSE10 | Chamaesyce serpyllum Small | Chamaesyce deltoidea ssp. serpyllum | Euphorbiaceae
|
| CHSE7 | Chamaesyce serrula (Engelm.) Woot. & Standl. | sawtooth sandmat | Euphorbiaceae
|
| CHSE8 | Chamaesyce setiloba (Engelm. ex Torr.) Millsp. ex Parish | Yuma sandmat | Euphorbiaceae
|
| CHSI5 | Chamaesyce simulans (L.C. Wheeler) Mayfield | smallseed sandmat | Euphorbiaceae
|
| CHSKA | Chamaesyce skottsbergii (Sherff) Croizat & Deg. var. audens (Sherff) O.& I. Deg. | Chamaesyce skottsbergii var. skottsbergii | Euphorbiaceae
|
| CHSKK | Chamaesyce skottsbergii (Sherff) Croizat & Deg. var. kalaeloana (Sherff) O.& I. Deg. | Chamaesyce skottsbergii var. skottsbergii | Euphorbiaceae
|
| CHSKS | Chamaesyce skottsbergii (Sherff) Croizat & Deg. var. skottsbergii | coastal sandmat | Euphorbiaceae
|
| CHSKV | Chamaesyce skottsbergii (Sherff) Croizat & Deg. var. vaccinioides (Sherff) Koutnik | coastal sandmat | Euphorbiaceae
|
| CHSK | Chamaesyce skottsbergii (Sherff) Croizat & Deg. | coastal sandmat | Euphorbiaceae
|
| CHSP4 | Chamaesyce sparsiflora (Heller) Koutnik | wahiawa bog sandmat | Euphorbiaceae
|
| CHST8 | Chamaesyce stictospora (Engelm.) Small | slimseed sandmat | Euphorbiaceae
|
| CHSU13 | Chamaesyce supina (Raf.) Moldenke | Chamaesyce maculata | Euphorbiaceae
|
| CHTH6 | Chamaesyce theriaca (L.C. Wheeler) Shinners | Terlingua sandmat | Euphorbiaceae
|
| CHTH4 | Chamaesyce thymifolia (L.) Millsp. | gulf sandmat | Euphorbiaceae
|
| CHTR3 | Chamaesyce trachysperma (Engelm.) Millsp. | San Pedro River sandmat | Euphorbiaceae
|
| CHTR10 | Chamaesyce tracyi Small | Chamaesyce maculata | Euphorbiaceae
|
| CHTU | Chamaesyce turpinii (Boiss.) Millsp. | Turpin's sandmat | Euphorbiaceae
|
| CHVA5 | Chamaesyce vahlii (Willd.) P. Wilson | Chamaesyce articulata | Euphorbiaceae
|
| CHVA4 | Chamaesyce vallis-mortae Millsp. | Death Valley sandmat | Euphorbiaceae
|
| CHVE11 | Chamaesyce velleriflora (Klotzsch & Garcke) Millsp. | Caliche sandmat | Euphorbiaceae
|
| CHVE5 | Chamaesyce vermiculata (Raf.) House | wormseed sandmat | Euphorbiaceae
|
| CHVE8 | Chamaesyce versicolor (Greene) J.B.S. Norton | Chamaesyce arizonica | Euphorbiaceae
|
| CHVI17 | Chamaesyce villifera (Scheele) Small | hairy sandmat | Euphorbiaceae
|
| CHZY | Chamaesyce zygophylloides (Boiss.) Small | Chamaesyce missurica | Euphorbiaceae
|
| CHAMA15 | Chamaesyce S.F. Gray | sandmat | Euphorbiaceae
|
| CHACR | Chamberlainia acuminata (Hedw.) Grout var. rupincola (Hedw.) Grout | Brachythecium acuminatum | Brachytheciaceae
|
| CHAC4 | Chamberlainia acuminata (Hedw.) Grout | Brachythecium acuminatum | Brachytheciaceae
|
| CHAL20 | Chamberlainia albicans (Hedw.) Robins. | Brachythecium albicans | Brachytheciaceae
|
| CHBI6 | Chamberlainia biventrosa (C. M�ll.) Grout | Brachythecium biventrosum | Brachytheciaceae
|
| CHCA33 | Chamberlainia calcarea (Kindb.) Robins. | Brachythecium calcareum | Brachytheciaceae
|
| CHCA34 | Chamberlainia campestris (C. M�ll.) Robins. | Brachythecium campestre | Brachytheciaceae
|
| CHCOS2 | Chamberlainia collina (Schleich. ex C. M�ll.) Robins. var. suberythrorrhiza (Ren. & Card.) Robins. | Brachythecium velutinum var. venustum | Brachytheciaceae
|
| CHCOU | Chamberlainia collina (Schleich. ex C. M�ll.) Robins. var. utahensis (James) Robins. | Brachythecium fendleri | Brachytheciaceae
|
| CHCO24 | Chamberlainia collina (Schleich. ex C. M�ll.) Robins. | Brachythecium collinum | Brachytheciaceae
|
| CHCY3 | Chamberlainia cyrtophylla (Kindb.) Grout | Brachythecium acuminatum | Brachytheciaceae
|
| CHDI9 | Chamberlainia digastra (C. M�ll. & Kindb. in Mac. & Kindb.) Robins. | Brachythecium digastrum | Brachytheciaceae
|
| CHER5 | Chamberlainia erythrorrhiza (Schimp. in B.S.G.) Robins. | Brachythecium erythrorrhizon | Brachytheciaceae
|
| CHLE13 | Chamberlainia leibergii (Grout) Robins. | Brachythecium leibergii | Brachytheciaceae
|
| CHOX | Chamberlainia oxyclada (Brid.) Robins. | Brachythecium oxycladon | Brachytheciaceae
|
| CHRO8 | Chamberlainia rotaeana (De Not.) Robins. | Brachythecium rotaeanum | Brachytheciaceae
|
| CHSA9 | Chamberlainia salebrosa (Web. & Mohr) Robins. | Brachythecium salebrosum var. salebrosum | Brachytheciaceae
|
| CHSP10 | Chamberlainia splendens (Aust.) Robins. | Brachythecium biventrosum | Brachytheciaceae
|
| CHST10 | Chamberlainia stereopoma (Spruce ex Mitt.) Robins. | Brachythecium stereopoma | Brachytheciaceae
|
| CHTU2 | Chamberlainia turgida (Hartm.) Robins. | Brachythecium turgidum | Brachytheciaceae
|
| CHVE10 | Chamberlainia velutina (Hedw.) Robins. | Brachythecium velutinum var. velutinum | Brachytheciaceae
|
| CHUN4 | Chamelaucium uncinatum Schauer | Geraldton wax | Myrtaceae
|
| CHAME3 | Chamelaucium Desf. | chamelaucium | Myrtaceae
|
| CHANA2 | Chamerion angustifolium (L.) Holub ssp. angustifolium | fireweed | Onagraceae
|
| CHANC | Chamerion angustifolium (L.) Holub ssp. circumvagum (Mosquin) Kartesz, comb. nov. ined. | fireweed | Onagraceae
|
| CHAN9 | Chamerion angustifolium (L.) Holub | fireweed | Onagraceae
|
| CHDA2 | Chamerion danielsii D. L�ve | Chamerion angustifolium ssp. circumvagum | Onagraceae
|
| CHLA13 | Chamerion latifolium (L.) Holub | dwarf fireweed | Onagraceae
|
| CHPL4 | Chamerion platyphyllum (Daniels) A.& D. L�ve | Chamerion angustifolium ssp. circumvagum | Onagraceae
|
| CHSP6 | Chamerion spicatum (Lam.) S.F. Gray | Chamerion angustifolium ssp. angustifolium | Onagraceae
|
| CHSU11 | Chamerion subdentatum (Rydb.) A.& D. L�ve | Chamerion latifolium | Onagraceae
|
| CHAME2 | Chamerion Raf. ex Holub | fireweed | Onagraceae
|
| CHAN6 | Chamisme angustifolia (Michx.) Nieuwl. | Hedyotis nigricans var. nigricans | Rubiaceae
|
| CHAL10 | Chamissoa altissima (Jacq.) Kunth | false chaff flower | Amaranthaceae
|
| CHAMI | Chamissoa Kunth | chamissoa | Amaranthaceae
|
| CHCH8 | Chamomilla chamomilla (L.) Rydb. | Matricaria recutita | Asteraceae
|
| CHIN7 | Chamomilla inodora (L.) Gilib. | Tripleurospermum perforata | Asteraceae
|
| CHMA13 | Chamomilla maritima (L.) Rydb. | Tripleurospermum maritima ssp. maritima | Asteraceae
|
| CHOC3 | Chamomilla occidentalis (Greene) Rydb. | Matricaria occidentalis | Asteraceae
|
| CHRE2 | Chamomilla recutita (L.) Rauschert | Matricaria recutita | Asteraceae
|
| CHSU5 | Chamomilla suaveolens (Pursh) Rydb. | Matricaria discoidea | Asteraceae
|
| CHHI12 | Chandonanthus hirtellus (Weber) Mitt. | | Jungermanniaceae
|
| CHAND | Chandonanthus Mitt. | | Jungermanniaceae
|
| CHFL2 | Chapmannia floridana Torr. & Gray | Florida alicia | Fabaceae
|
| CHAPM | Chapmannia Torr. & Gray | chapmannia | Fabaceae
|
| CHAL18 | Chaptalia albicans (Sw.) Vent. ex Steud. | white sunbonnets | Asteraceae
|
| CHAL4 | Chaptalia alsophila Greene | Leibnitzia lyrata | Asteraceae
|
| CHDE4 | Chaptalia dentata (L.) Cass. | pineland daisy | Asteraceae
|
| CHLE8 | Chaptalia leucocephala Greene | Leibnitzia lyrata | Asteraceae
|
| CHNUT | Chaptalia nutans (L.) Polak. var. texana (Greene) Burkart | Chaptalia texana | Asteraceae
|
| CHNU2 | Chaptalia nutans (L.) Polak. | heal and draw | Asteraceae
|
| CHSE15 | Chaptalia seemannii (Schultz-Bip.) Hemsl. | Leibnitzia lyrata | Asteraceae
|
| CHTE6 | Chaptalia texana Greene | silverpuff | Asteraceae
|
| CHTO | Chaptalia tomentosa Vent. | woolly sunbonnets | Asteraceae
|
| CHAPT | Chaptalia Vent. | sunbonnetts | Asteraceae
|
| CHDE3 | Charpentiera densiflora Sohmer | Napali coast papala | Amaranthaceae
|
| CHEL | Charpentiera elliptica (Hbd.) Heller | ellipticleaf papala | Amaranthaceae
|
| CHOB2 | Charpentiera obovata Gaud. | broadleaf papala | Amaranthaceae
|
| CHOVN | Charpentiera ovata Gaud. var. niuensis Sohmer | Koolau Range papala | Amaranthaceae
|
| CHOVO | Charpentiera ovata Gaud. var. ovata | Koolau Range papala | Amaranthaceae
|
| CHOV2 | Charpentiera ovata Gaud. | Koolau Range papala | Amaranthaceae
|
| CHTOM | Charpentiera tomentosa Sohmer var. maakuaensis Sohmer | Waianae Range papala | Amaranthaceae
|
| CHTOT | Charpentiera tomentosa Sohmer var. tomentosa | Waianae Range papala | Amaranthaceae
|
| CHTO3 | Charpentiera tomentosa Sohmer | Waianae Range papala | Amaranthaceae
|
| CHARP | Charpentiera Gaud. | papala | Amaranthaceae
|
| CHAE2 | Chasmanthe aethiopica auct. non (L.) N.E. Br. | Chasmanthe floribunda | Iridaceae
|
| CHFL9 | Chasmanthe floribunda (Salisb.) N.E. Br. | African cornflag | Iridaceae
|
| CHASM2 | Chasmanthe N.E. Br. | African cornflag | Iridaceae
|
| CHLA5 | Chasmanthium latifolium (Michx.) Yates | Indian woodoats | Poaceae
|