| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| CESE7 | Cetraria sepincola (Ehrh.) Ach. | Tuckermannopsis sepincola | Parmeliaceae
|
| CESI6 | Cetraria siberica H. Magn. | Arctocetraria nigricascens | Parmeliaceae
|
| CESI7 | Cetraria simmonsii Krog | Arctocetraria andrejevii | Parmeliaceae
|
| CEST4 | Cetraria stenophylla (Tuck.) G. K Merr. | Platismatia stenophylla | Parmeliaceae
|
| CESU60 | Cetraria subalpina Imshaug | Tuckermannopsis subalpina | Parmeliaceae
|
| CETI60 | Cetraria tilesii Ach. | Vulpicida tilesii | Parmeliaceae
|
| CETU3 | Cetraria tuckermanii Herre | Platismatia herrei | Parmeliaceae
|
| CETU2 | Cetraria tuckermanii Oakes | Platismatia tuckermanii | Parmeliaceae
|
| CEVI8 | Cetraria viridis Schwein | Vulpicida viridis | Parmeliaceae
|
| CEWE | Cetraria weberi Essl. | Tuckermannopsis weberi | Parmeliaceae
|
| CETRA2 | Cetraria Ach. | cetraria | Parmeliaceae
|
| CECA17 | Cetrariastum catawbiense (Degel.) Culb. & C. Culb. | Everniastrum catawbiense | Parmeliaceae
|
| CEDE13 | Cetrariella delisei (Bory ex Schaerer) Karnefelt & Thell | | Parmeliaceae
|
| CEFA5 | Cetrariella fastigiata (Delise ex Nyl.) Karnefelt & Thell | | Parmeliaceae
|
| CETRA3 | Cetrariella Karnefelt & Thell | cetrariella | Parmeliaceae
|
| CEAL9 | Cetrelia alaskana (C. Culb. & Culb.) Culb. & C. Culb. | Alaskan giant shield lichen | Parmeliaceae
|
| CECE4 | Cetrelia cetrarioides (Duby) Culb. & C. Culb. | giant shield lichen | Parmeliaceae
|
| CECH2 | Cetrelia chicitae (Culb.) Culb. & C. Culb. | Chicita's giant shield lichen | Parmeliaceae
|
| CEMO4 | Cetrelia monachorum (Zahlbr.) Culb. & C. Culb. | giant shield lichen | Parmeliaceae
|
| CEOL2 | Cetrelia olivetorum (Nyl.) Culb. & C. Culb. | giant shield lichen | Parmeliaceae
|
| CETRE | Cetrelia Culb. & C. Culb. | giant shield lichen | Parmeliaceae
|
| CESI | Cevallia sinuata Lag. | stinging serpent | Loasaceae
|
| CEVAL | Cevallia Lag. | stinging serpent | Loasaceae
|
| CHAL | Chaenactis alpigena C.W. Sharsmith | southern Sierra pincushion | Asteraceae
|
| CHALL2 | Chaenactis alpina (Gray) M.E. Jones var. leucopsis (Greene) Cockerell ex Stockwell | Chaenactis leucopsis | Asteraceae
|
| CHALR2 | Chaenactis alpina (Gray) M.E. Jones var. rubella (Greene) Stockwell | Chaenactis leucopsis | Asteraceae
|
| CHAL2 | Chaenactis alpina (Gray) M.E. Jones | Chaenactis douglasii var. alpina | Asteraceae
|
| CHAN11 | Chaenactis angustifolia Greene | Chaenactis douglasii var. douglasii | Asteraceae
|
| CHAR | Chaenactis artemisiifolia (Harvey & Gray ex Gray) Gray | white pincushion | Asteraceae
|
| CHBRS2 | Chaenactis brachiata Greene var. stansburiana Stockwell | Chaenactis douglasii var. douglasii | Asteraceae
|
| CHBR4 | Chaenactis brachiata Greene | Chaenactis douglasii var. douglasii | Asteraceae
|
| CHCAA | Chaenactis carphoclinia Gray var. attenuata (Gray) M.E. Jones | Chaenactis carphoclinia var. carphoclinia | Asteraceae
|
| CHCAC | Chaenactis carphoclinia Gray var. carphoclinia | pebble pincushion | Asteraceae
|
| CHCAP2 | Chaenactis carphoclinia Gray var. peirsonii (Jepson) Munz | Peirson's pincushion | Asteraceae
|
| CHCA | Chaenactis carphoclinia Gray | pebble pincushion | Asteraceae
|
| CHCI3 | Chaenactis cineria Stockwell | Chaenactis douglasii var. douglasii | Asteraceae
|
| CHCU | Chaenactis cusickii Gray | Cusick's pincushion | Asteraceae
|
| CHDOA | Chaenactis douglasii (Hook.) Hook. & Arn. var. achilleifolia (Hook. & Arn.) Gray | Chaenactis douglasii var. douglasii | Asteraceae
|
| CHDOA2 | Chaenactis douglasii (Hook.) Hook. & Arn. var. alpina Gray | alpine dustymaiden | Asteraceae
|
| CHDOD | Chaenactis douglasii (Hook.) Hook. & Arn. var. douglasii | Douglas' dustymaiden | Asteraceae
|
| CHDOG | Chaenactis douglasii (Hook.) Hook. & Arn. var. glandulosa Cronq. | Chaenactis douglasii var. douglasii | Asteraceae
|
| CHDOM | Chaenactis douglasii (Hook.) Hook. & Arn. var. montana M.E. Jones | Chaenactis douglasii var. douglasii | Asteraceae
|
| CHDON | Chaenactis douglasii (Hook.) Hook. & Arn. var. nana Stockwell | Chaenactis douglasii var. douglasii | Asteraceae
|
| CHDOR | Chaenactis douglasii (Hook.) Hook. & Arn. var. rubricaulis Rydb. | Chaenactis douglasii var. douglasii | Asteraceae
|
| CHDOT | Chaenactis douglasii (Hook.) Hook. & Arn. var. typicus Cronq. | Chaenactis douglasii var. douglasii | Asteraceae
|
| CHDO | Chaenactis douglasii (Hook.) Hook. & Arn. | Douglas' dustymaiden | Asteraceae
|
| CHEV | Chaenactis evermannii Greene | Evermann's pincushion | Asteraceae
|
| CHFR | Chaenactis fremontii Gray | pincushion flower | Asteraceae
|
| CHFU5 | Chaenactis furcata Stockwell | Chaenactis glabriuscula var. glabriuscula | Asteraceae
|
| CHGI3 | Chaenactis gillespiei Stockwell | Chaenactis stevioides | Asteraceae
|
| CHGLA | Chaenactis glabriuscula DC. var. aurea (Greene) Stockwell | Chaenactis glabriuscula var. glabriuscula | Asteraceae
|
| CHGLC | Chaenactis glabriuscula DC. var. curta (Gray) Jepson | Chaenactis glabriuscula var. glabriuscula | Asteraceae
|
| CHGLD2 | Chaenactis glabriuscula DC. var. denudata (Nutt.) Munz | Chaenactis glabriuscula var. lanosa | Asteraceae
|
| CHGLG2 | Chaenactis glabriuscula DC. var. glabriuscula | yellow pincushion | Asteraceae
|
| CHGLG | Chaenactis glabriuscula DC. var. gracilenta (Greene) Keck | Chaenactis glabriuscula var. heterocarpha | Asteraceae
|
| CHGLH | Chaenactis glabriuscula DC. var. heterocarpha (Torr. & Gray ex Gray) Hall | yellow pincushion | Asteraceae
|
| CHGLL2 | Chaenactis glabriuscula DC. var. lanosa (DC.) Hall | yellow pincushion | Asteraceae
|
| CHGLM | Chaenactis glabriuscula DC. var. megacephala Gray | yellow pincushion | Asteraceae
|
| CHGLO | Chaenactis glabriuscula DC. var. orcuttiana (Greene) Hall | Orcutt's yellow pincushion | Asteraceae
|
| CHGLT | Chaenactis glabriuscula DC. var. tenuifolia (Nutt.) Hall | Chaenactis glabriuscula var. glabriuscula | Asteraceae
|
| CHGL | Chaenactis glabriuscula DC. | yellow pincushion | Asteraceae
|
| CHHE5 | Chaenactis heterocarpha Torr. & Gray ex Gray | Chaenactis glabriuscula var. heterocarpha | Asteraceae
|
| CHHU4 | Chaenactis humilis Rydb. | Chaenactis douglasii var. douglasii | Asteraceae
|
| CHLA15 | Chaenactis lanosa DC. | Chaenactis glabriuscula var. lanosa | Asteraceae
|
| CHLA16 | Chaenactis latifolia Stockwell | Chaenactis stevioides | Asteraceae
|
| CHLE10 | Chaenactis leucopsis Greene | alpine pincushion | Asteraceae
|
| CHMA | Chaenactis macrantha D.C. Eat. | bighead dustymaiden | Asteraceae
|
| CHME8 | Chaenactis mexicana Stockwell | Chaenactis stevioides | Asteraceae
|
| CHMI10 | Chaenactis minuscula Greene | Chaenactis douglasii var. alpina | Asteraceae
|
| CHNEM | Chaenactis nevadensis (Kellogg) Gray var. mainsiana (A. Nels. & J.F. Macbr.) Stockwell | Chaenactis evermannii | Asteraceae
|
| CHNE | Chaenactis nevadensis (Kellogg) Gray | Nevada dustymaiden | Asteraceae
|
| CHNE6 | Chaenactis nevii Gray | John Day's pincushion | Asteraceae
|
| CHOR5 | Chaenactis orcuttiana (Greene) Parish | Chaenactis glabriuscula var. orcuttiana | Asteraceae
|
| CHPA35 | Chaenactis panamintensis Stockwell | Chaenactis douglasii var. douglasii | Asteraceae
|
| CHPA | Chaenactis parishii Gray | Parish's chaenactis | Asteraceae
|
| CHRA2 | Chaenactis ramosa Stockwell | Chaenactis douglasii var. douglasii | Asteraceae
|
| CHRU4 | Chaenactis rubricaulis Rydb. | Chaenactis douglasii var. douglasii | Asteraceae
|
| CHSAI | Chaenactis santolinoides Greene var. indurata Stockwell | Chaenactis santolinoides | Asteraceae
|
| CHSA | Chaenactis santolinoides Greene | Santolina pincushion | Asteraceae
|
| CHSC4 | Chaenactis scaposa Eastw. | Chamaechaenactis scaposa var. scaposa | Asteraceae
|
| CHSTB2 | Chaenactis stevioides Hook. & Arn. var. brachypappa (Gray) Hall | Chaenactis stevioides | Asteraceae
|
| CHSTT | Chaenactis stevioides Hook. & Arn. var. thornberi Stockwell | Chaenactis stevioides | Asteraceae
|
| CHST | Chaenactis stevioides Hook. & Arn. | Steve's dustymaiden | Asteraceae
|
| CHSUI | Chaenactis suffrutescens Gray var. incana Stockwell | Chaenactis suffrutescens | Asteraceae
|
| CHSU | Chaenactis suffrutescens Gray | Shasta chaenactis | Asteraceae
|
| CHSU10 | Chaenactis suksdorfii Stockwell | Chaenactis douglasii var. douglasii | Asteraceae
|
| CHTAG | Chaenactis tanacetifolia Gray var. gracilenta (Greene) Stockwell | Chaenactis glabriuscula var. heterocarpha | Asteraceae
|
| CHTA2 | Chaenactis tanacetifolia Gray | Chaenactis glabriuscula var. heterocarpha | Asteraceae
|
| CHTEO | Chaenactis tenuifolia Nutt. var. orcuttiana Greene | Chaenactis glabriuscula var. orcuttiana | Asteraceae
|
| CHTE8 | Chaenactis tenuifolia Nutt. | Chaenactis glabriuscula var. glabriuscula | Asteraceae
|
| CHTH | Chaenactis thompsonii Cronq. | Thompson's pincushion | Asteraceae
|
| CHXA | Chaenactis xantiana Gray | fleshcolor pincushion | Asteraceae
|
| CHAEN | Chaenactis DC. | pincushion | Asteraceae
|
| CHJA2 | Chaenomeles japonica (Thunb.) Lindl. ex Spach | Maule's quince | Rosaceae
|
| CHLA24 | Chaenomeles lagenaria (Loisel.) Koidzumi | Chaenomeles speciosa | Rosaceae
|
| CHSI7 | Chaenomeles sinensis Koehne | Pseudocydonia sinensis | Rosaceae
|
| CHSP12 | Chaenomeles speciosa (Sweet) Nakai | flowering quince | Rosaceae
|
| CHSU21 | Chaenomeles �superba (Frahm) Rehder | quince | Rosaceae
|
| CHAEN6 | Chaenomeles Lindl. | flowering quince | Rosaceae
|
| CHMI | Chaenorhinum minus (L.) Lange | dwarf snapdragon | Scrophulariaceae
|
| CHAEN7 | Chaenorhinum (DC.) Reichenb. | dwarf snapdragon | Scrophulariaceae
|