| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| CLRO7 | Cladonia robbinsii A. Evans | Robbins' cup lichen | Cladoniaceae
|
| CLSA8 | Cladonia sandstedei Abbayes | Cladina sandstedei | Cladoniaceae
|
| CLSA7 | Cladonia santensis Tuck. | cup lichen | Cladoniaceae
|
| CLSC60 | Cladonia scabriuscula (Delise) Nyl. | cup lichen | Cladoniaceae
|
| CLSC3 | Cladonia schofieldii Ahti & Brodo | cup lichen | Cladoniaceae
|
| CLSI5 | Cladonia simulata Robbins | cup lichen | Cladoniaceae
|
| CLSI6 | Cladonia singularis S. Hammer | cup lichen | Cladoniaceae
|
| CLSO4 | Cladonia sobolescens Nyl. ex Vainio | cup lichen | Cladoniaceae
|
| CLSQS | Cladonia squamosa (Scop.) Hoffm. var. subsquamosa (Nyl. ex Leighton) Vainio | cup lichen | Cladoniaceae
|
| CLSQ60 | Cladonia squamosa Hoffm. | cup lichen | Cladoniaceae
|
| CLST8 | Cladonia stellaris (Opiz) Pouzar & Vezda | Cladina stellaris | Cladoniaceae
|
| CLST6 | Cladonia strepsilis (Ach.) Grognot | cup lichen | Cladoniaceae
|
| CLSTU | Cladonia stricta (Nyl.) Nyl. var. uliginosa Ahti | cup lichen | Cladoniaceae
|
| CLST7 | Cladonia stricta (Nyl.) Nyl. | cup lichen | Cladoniaceae
|
| CLST9 | Cladonia stygia (Fr.) Ruoss | Cladina stygia | Cladoniaceae
|
| CLSU12 | Cladonia subcariosa auct. | Cladonia polycarpoides | Cladoniaceae
|
| CLSU60 | Cladonia subfurcata (Nyl.) Arnold | cup lichen | Cladoniaceae
|
| CLSU13 | Cladonia submitis A. Evans | Cladina submitis | Cladoniaceae
|
| CLSU9 | Cladonia subradiata (Vainio) Sandst. | cup lichen | Cladoniaceae
|
| CLSU14 | Cladonia subrangiformis auct. | Cladonia furcata | Cladoniaceae
|
| CLSU10 | Cladonia subsetacea Robbins ex A. Evans | cup lichen | Cladoniaceae
|
| CLSU15 | Cladonia subsquamosa (Nyl. ex Leighton) Crombie | Cladonia squamosa var. subsquamosa | Cladoniaceae
|
| CLSU62 | Cladonia subsquamosa Krempelh. | cup lichen | Cladoniaceae
|
| CLSU16 | Cladonia subtenuis (Abbayes) Mattick | Cladina subtenuis | Cladoniaceae
|
| CLSU63 | Cladonia subulata (L.) Weber ex F. H. Wigg. | cup lichen | Cladoniaceae
|
| CLSU64 | Cladonia sulphurina (Michaux) Fr. | sulphur cup lichen | Cladoniaceae
|
| CLSY2 | Cladonia sylvatica auct. | Cladina arbuscula | Cladoniaceae
|
| CLSY61 | Cladonia symphycarpa (Florke) Fr. | cup lichen | Cladoniaceae
|
| CLTE11 | Cladonia tenuis (Florke) Harm. | Cladina ciliata | Cladoniaceae
|
| CLTE12 | Cladonia terrae-novae Ahti | Cladina terrae-novae | Cladoniaceae
|
| CLTH2 | Cladonia thiersii S. Hammer | Thiers' cup lichen | Cladoniaceae
|
| CLTH60 | Cladonia thomsonii Ahti | Thomson's cup lichen | Cladoniaceae
|
| CLTR60 | Cladonia transcendens (Vainio) Vainio | transcend cup lichen | Cladoniaceae
|
| CLTU60 | Cladonia turgida Hoffm. | turgid cup lichen | Cladoniaceae
|
| CLUM4 | Cladonia umbricola Tonsberg & Ahti | cup lichen | Cladoniaceae
|
| CLUN60 | Cladonia uncialis (L.) F. H. Wigg. | cup lichen | Cladoniaceae
|
| CLVE4 | Cladonia verruculosa (Vainio) Ahti | cup lichen | Cladoniaceae
|
| CLVE5 | Cladonia verticillata (Hoffm.) Schaerer | Cladonia cervicornis ssp. verticillata | Cladoniaceae
|
| CLVU3 | Cladonia vulcanica Zoll. & Moritzi | Cladonia didyma var. vulcanica | Cladoniaceae
|
| CLWA5 | Cladonia wainioi Savicz | Wain's cup lichen | Cladoniaceae
|
| CLADO3 | Cladonia P. Browne | cup lichen | Cladoniaceae
|
| CLFL9 | Cladopodiella fluitans (Nees) H. Buch | | Cephaloziaceae
|
| CLFR5 | Cladopodiella francisci (Hook.) H. Buch ex J�rg. | | Cephaloziaceae
|
| CLADO2 | Cladopodiella H. Buch | | Cephaloziaceae
|
| CLCY2 | Cladoraphis cyperoides (Thunb.) S.M. Phillips | bristly lovegrass | Poaceae
|
| CLADO | Cladoraphis Franch. | bristly lovegrass | Poaceae
|
| CLPY3 | Cladothamnus pyroliflorus Bong. | Elliottia pyroliflorus | Ericaceae
|
| CLLA7 | Cladothrix lanuginosa Nutt. | Tidestromia lanuginosa | Amaranthaceae
|
| CLKE | Cladrastis kentukea (Dum.-Cours.) Rudd | Kentucky yellowwood | Fabaceae
|
| CLLU | Cladrastis lutea (Michx. f.) K. Koch | Cladrastis kentukea | Fabaceae
|
| CLADR | Cladrastis Raf. | yellowwood | Fabaceae
|
| CLBO10 | Claopodium bolanderi Best | Bolander's claopodium moss | Leskeaceae
|
| CLCR4 | Claopodium crispifolium (Hook.) Ren. & Card. | claopodium moss | Leskeaceae
|
| CLPE8 | Claopodium pellucinerve (Mitt.) Best | claopodium moss | Leskeaceae
|
| CLSU17 | Claopodium subpiliferum (Lindb. & Arnell) Broth. | Claopodium pellucinerve | Leskeaceae
|
| CLWHL | Claopodium whippleanum (Sull. in Whipple & Ives) Ren. & Card. var. leuconeuron (Sull. & Lesq.) Grout | Claopodium whippleanum | Leskeaceae
|
| CLWH | Claopodium whippleanum (Sull. in Whipple & Ives) Ren. & Card. | Whipple's claopodium moss | Leskeaceae
|
| CLAOP | Claopodium (Lesq. & James) Ren. & Card. | claopodium moss | Leskeaceae
|
| CLHE2 | Claoxylon helleri Sherff | Claoxylon sandwicense | Euphorbiaceae
|
| CLSAD | Claoxylon sandwicense Muell.-Arg. var. degeneri Sherff | Claoxylon sandwicense | Euphorbiaceae
|
| CLSAG | Claoxylon sandwicense Muell.-Arg. var. glabrescens (Sherff) Sherff | Claoxylon sandwicense | Euphorbiaceae
|
| CLSAH | Claoxylon sandwicense Muell.-Arg. var. hillebrandii Sherff | Claoxylon sandwicense | Euphorbiaceae
|
| CLSAM | Claoxylon sandwicense Muell.-Arg. var. magnifolium Sherff | Claoxylon sandwicense | Euphorbiaceae
|
| CLSAT | Claoxylon sandwicense Muell.-Arg. var. tomentosum Hbd. | Claoxylon sandwicense | Euphorbiaceae
|
| CLSA | Claoxylon sandwicense Muell.-Arg. | po'ola | Euphorbiaceae
|
| CLAOX | Claoxylon A. Juss. | claoxylon | Euphorbiaceae
|
| CLFI3 | Clappertonia ficifolia (Willd.) Decne. | bolo bolo | Tiliaceae
|
| CLPO8 | Clappertonia polyandra (Schumann) Bech. | clappertonia | Tiliaceae
|
| CLAPP2 | Clappertonia Meissner | clappertonia | Tiliaceae
|
| CLSU | Clappia suaedifolia Gray | fleshy clapdaisy | Asteraceae
|
| CLAPP | Clappia Gray | clapdaisy | Asteraceae
|
| CLAF | Clarkia affinis H.F. & M.E. Lewis | chaparral clarkia | Onagraceae
|
| CLAMA | Clarkia amoena (Lehm.) A. Nels. & J.F. Macbr. ssp. amoena | farewell to spring | Onagraceae
|
| CLAMC | Clarkia amoena (Lehm.) A. Nels. & J.F. Macbr. ssp. caurina (Abrams ex Piper) H.F. & M.E. Lewis | farewell to spring | Onagraceae
|
| CLAMH | Clarkia amoena (Lehm.) A. Nels. & J.F. Macbr. ssp. huntiana (Jepson) H.F. & M.E. Lewis | farewell to spring | Onagraceae
|
| CLAML | Clarkia amoena (Lehm.) A. Nels. & J.F. Macbr. ssp. lindleyi (Dougl.) H.F. & M.E. Lewis | Lindley's clarkia | Onagraceae
|
| CLAMW | Clarkia amoena (Lehm.) A. Nels. & J.F. Macbr. ssp. whitneyi (Gray) H.F. & M.E. Lewis | Whitney's clarkia | Onagraceae
|
| CLAMC2 | Clarkia amoena (Lehm.) A. Nels. & J.F. Macbr. var. caurina (Abrams ex Piper) C.L. Hitchc. | Clarkia amoena ssp. caurina | Onagraceae
|
| CLAML2 | Clarkia amoena (Lehm.) A. Nels. & J.F. Macbr. var. lindleyi (Dougl.) C.L. Hitchc. | Clarkia amoena ssp. lindleyi | Onagraceae
|
| CLAMP | Clarkia amoena (Lehm.) A. Nels. & J.F. Macbr. var. pacifica (M.E. Peck) C.L. Hitchc. | Clarkia amoena ssp. caurina | Onagraceae
|
| CLAM | Clarkia amoena (Lehm.) A. Nels. & J.F. Macbr. | farewell to spring | Onagraceae
|
| CLAR | Clarkia arcuata (Kellogg) A. Nels. & J.F. Macbr. | glandular clarkia | Onagraceae
|
| CLAU2 | Clarkia australis E. Small | Small's southern clarkia | Onagraceae
|
| CLBIA | Clarkia biloba (Dur.) A. Nels. & J.F. Macbr. ssp. australis H.F. & M.E. Lewis | Mariposa clarkia | Onagraceae
|
| CLBIB2 | Clarkia biloba (Dur.) A. Nels. & J.F. Macbr. ssp. biloba | twolobe clarkia | Onagraceae
|
| CLBIB | Clarkia biloba (Dur.) A. Nels. & J.F. Macbr. ssp. brandegeeae (Jepson) H.F. & M.E. Lewis | Brandegee's clarkia | Onagraceae
|
| CLBI | Clarkia biloba (Dur.) A. Nels. & J.F. Macbr. | twolobe clarkia | Onagraceae
|
| CLBOA | Clarkia borealis E. Small ssp. arida E. Small | Shasta clarkia | Onagraceae
|
| CLBOB | Clarkia borealis E. Small ssp. borealis | northern clarkia | Onagraceae
|
| CLBO4 | Clarkia borealis E. Small | northern clarkia | Onagraceae
|
| CLBO | Clarkia bottae (Spach) H.F. & M.E. Lewis | Botta's clarkia | Onagraceae
|
| CLBR | Clarkia breweri (Gray) Greene | fairy fans | Onagraceae
|
| CLCA4 | Clarkia calientensis Vasek | Clarkia tembloriensis ssp. calientensis | Onagraceae
|
| CLCOA | Clarkia concinna (Fisch. & C.A. Mey.) Greene ssp. automixa R.N. Bowman | red ribbons | Onagraceae
|
| CLCOC | Clarkia concinna (Fisch. & C.A. Mey.) Greene ssp. concinna | red ribbons | Onagraceae
|
| CLCOR | Clarkia concinna (Fisch. & C.A. Mey.) Greene ssp. raichei G. Allen, V. Ford & L. Gottlieb | Raiche's clarkia | Onagraceae
|
| CLCO | Clarkia concinna (Fisch. & C.A. Mey.) Greene | red ribbons | Onagraceae
|
| CLCYC | Clarkia cylindrica (Jepson) H.F. & M.E. Lewis ssp. clavicarpa W.S. Davis | speckled clarkia | Onagraceae
|
| CLCYC2 | Clarkia cylindrica (Jepson) H.F. & M.E. Lewis ssp. cylindrica | speckled clarkia | Onagraceae
|
| CLCY | Clarkia cylindrica (Jepson) H.F. & M.E. Lewis | speckled clarkia | Onagraceae
|
| CLDA | Clarkia davyi (Jepson) H.F. & M.E. Lewis | Davy's clarkia | Onagraceae
|