| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| ERPI7 | Ericameria pinifolia (Gray) Hall | pinebush | Asteraceae
|
| ERPUB2 | Ericameria pulchella (Gray) L.C. Anders. ssp. baileyi (Woot. & Standl.) L.C. Anders. | Chrysothamnus baileyi | Asteraceae
|
| ERPUE3 | Ericameria pulchella (Gray) L.C. Anders. var. elatior (Standl.) L.C. Anders. | Chrysothamnus pulchellus | Asteraceae
|
| ERPU19 | Ericameria pulchella (Gray) L.C. Anders. | Chrysothamnus pulchellus | Asteraceae
|
| ERRE8 | Ericameria resinosa Nutt. | Columbian goldenbush | Asteraceae
|
| ERSP18 | Ericameria spathulata (L.C. Anders.) L.C. Anders. | Chrysothamnus spathulatus | Asteraceae
|
| ERSU13 | Ericameria suffruticosa (Nutt.) Nesom | singlehead goldenbush | Asteraceae
|
| ERTE18 | Ericameria teretifolia (Dur. & Hilg.) Jepson | green rabbitbrush | Asteraceae
|
| ERTR14 | Ericameria triantha (Blake) Shinners | Xylothamia triantha | Asteraceae
|
| ERUI2 | Ericameria �uintahensis (L.C. Anders.) Nesom & Baird | Uinta rubber rabbitbrush | Asteraceae
|
| ERVA9 | Ericameria vaseyi (Gray) L.C. Anders. | Chrysothamnus vaseyi | Asteraceae
|
| ERVIA | Ericameria viscidiflora (Hook.) L.C. Anders. ssp. axillaris (Keck) L.C. Anders. | Chrysothamnus viscidiflorus ssp. axillaris | Asteraceae
|
| ERVIL | Ericameria viscidiflora (Hook.) L.C. Anders. ssp. lanceolata (Nutt.) L.C. Anders. | Chrysothamnus viscidiflorus ssp. lanceolatus | Asteraceae
|
| ERVIP | Ericameria viscidiflora (Hook.) L.C. Anders. ssp. planifolia (L.C. Anders.) L.C. Anders. | Chrysothamnus viscidiflorus ssp. planifolius | Asteraceae
|
| ERVIP2 | Ericameria viscidiflora (Hook.) L.C. Anders. ssp. puberula (D.C. Eat.) L.C. Anders. | Chrysothamnus viscidiflorus ssp. puberulus | Asteraceae
|
| ERVIL2 | Ericameria viscidiflora (Hook.) L.C. Anders. var. latifolia (D.C. Eat.) L.C. Anders. | Chrysothamnus viscidiflorus ssp. viscidiflorus var. latifolius | Asteraceae
|
| ERVIS2 | Ericameria viscidiflora (Hook.) L.C. Anders. var. stenophylla (Gray) L.C. Anders. | Chrysothamnus viscidiflorus ssp. viscidiflorus var. stenophyllus | Asteraceae
|
| ERVI22 | Ericameria viscidiflora (Hook.) L.C. Anders. | Chrysothamnus viscidiflorus ssp. viscidiflorus var. viscidiflorus | Asteraceae
|
| ERVI21 | Ericameria �viscosa (Keck) Nesom & Baird | | Asteraceae
|
| ERWA8 | Ericameria watsonii (Gray) Nesom | Watson's goldenbush | Asteraceae
|
| ERZI2 | Ericameria zionis (L.C. Anders.) Nesom | subalpine goldenbush | Asteraceae
|
| ERICA2 | Ericameria Nutt. | goldenbush | Asteraceae
|
| ERBU | Erigenia bulbosa (Michx.) Nutt. | harbinger of spring | Apiaceae
|
| ERIGE | Erigenia Nutt. | erigenia | Apiaceae
|
| ERAB3 | Erigeron abajoensis Cronq. | Abajo fleabane | Asteraceae
|
| ERAC7 | Erigeron acomanus Spellenberg & P. Knight | bluewater fleabane | Asteraceae
|
| ERACD2 | Erigeron acris L. ssp. debilis (Gray) Piper | bitter fleabane | Asteraceae
|
| ERACK3 | Erigeron acris L. ssp. kamtschaticus (DC.) Hara | bitter fleabane | Asteraceae
|
| ERACP2 | Erigeron acris L. ssp. politus (Fries) Schinz & R. Keller | bitter fleabane | Asteraceae
|
| ERACA2 | Erigeron acris L. var. asteroides (Andrz. ex Bess.) DC. | Erigeron acris ssp. politus | Asteraceae
|
| ERACD6 | Erigeron acris L. var. debilis Gray | Erigeron acris ssp. debilis | Asteraceae
|
| ERACE | Erigeron acris L. var. elatus (Hook.) Cronq. | Erigeron elatus | Asteraceae
|
| ERACK2 | Erigeron acris L. var. kamtschaticus (DC.) Herder | Erigeron acris ssp. kamtschaticus | Asteraceae
|
| ERAC2 | Erigeron acris L. | bitter fleabane | Asteraceae
|
| ERAC2 | Erigeron acris auct. non L. p.p. | Erigeron acris ssp. debilis | Asteraceae
|
| ERAC2 | Erigeron acris auct. non L. p.p. | Erigeron acris ssp. politus | Asteraceae
|
| ERAE | Erigeron aequifolius Hall | Hall's fleabane | Asteraceae
|
| ERAL19 | Erigeron alaskanus Cronq. | Erigeron hyperboreus | Asteraceae
|
| ERAL18 | Erigeron algidus Jepson | stalked fleabane | Asteraceae
|
| ERAL3 | Erigeron aliceae T.J. Howell | Alice Eastwood's fleabane | Asteraceae
|
| ERAL13 | Erigeron allocotus Blake | Big Horn fleabane | Asteraceae
|
| ERALE | Erigeron alpinus L. var. elatus Hook. | Erigeron elatus | Asteraceae
|
| ERAN17 | Erigeron anchana Nesom | Sierra Ancha fleabane | Asteraceae
|
| ERAN11 | Erigeron andersonii Gray | Oreostemma alpigenum var. andersonii | Asteraceae
|
| ERAND2 | Erigeron angulosus Gaudin ssp. debilis (Gray) Piper | Erigeron acris ssp. debilis | Asteraceae
|
| ERAN19 | Erigeron angustatus Greene | serpentine fleabane | Asteraceae
|
| ERANS8 | Erigeron annuus (L.) Pers. ssp. strigosus (Muhl. ex Willd.) Wagenitz | Erigeron strigosus var. strigosus | Asteraceae
|
| ERAND | Erigeron annuus (L.) Pers. var. discoideus (Victorin & Rouss.) Cronq. | Erigeron annuus | Asteraceae
|
| ERAN | Erigeron annuus (L.) Pers. | eastern daisy fleabane | Asteraceae
|
| ERAN12 | Erigeron anodonta Lunell | Erigeron glabellus var. pubescens | Asteraceae
|
| ERAPA2 | Erigeron aphanactis (Gray) Greene var. aphanactis | rayless shaggy fleabane | Asteraceae
|
| ERAPC | Erigeron aphanactis (Gray) Greene var. congestus (Greene) Cronq. | rayless shaggy fleabane | Asteraceae
|
| ERAP | Erigeron aphanactis (Gray) Greene | rayless shaggy fleabane | Asteraceae
|
| ERAP5 | Erigeron apurensis (Kunth) Griseb. | Conyza apurensis | Asteraceae
|
| ERAR20 | Erigeron arenarioides (D.C. Eat. ex Gray) Gray ex Rydb. | sand fleabane | Asteraceae
|
| ERAR29 | Erigeron arenarius Greene | Erigeron bellidiastrum var. arenarius | Asteraceae
|
| ERAR3 | Erigeron argentatus Gray | silver fleabane | Asteraceae
|
| ERAR22 | Erigeron arisolius Nesom | arid throne fleabane | Asteraceae
|
| ERAR4 | Erigeron arizonicus Gray | Arizona fleabane | Asteraceae
|
| ERAS3 | Erigeron asper Nutt. | rough fleabane | Asteraceae
|
| ERAS | Erigeron asperugineus (D.C. Eat.) Gray | Idaho fleabane | Asteraceae
|
| ERASP4 | Erigeron asperum Nutt. var. pubescens (Hook.) Breitung | Erigeron glabellus var. pubescens | Asteraceae
|
| ERAS4 | Erigeron asperum Nutt. p.p. | Erigeron glabellus var. glabellus | Asteraceae
|
| ERAU | Erigeron aureus Greene | alpine yellow fleabane | Asteraceae
|
| ERAU6 | Erigeron austiniae Greene | sagebrush fleabane | Asteraceae
|
| ERAW | Erigeron awapensis Welsh | Awapa fleabane | Asteraceae
|
| ERBA3 | Erigeron barbellulatus Greene | shining fleabane | Asteraceae
|
| ERBA4 | Erigeron basalticus Hoover | basalt fleabane | Asteraceae
|
| ERBEA | Erigeron bellidiastrum Nutt. var. arenarius (Greene) Nesom | sandwort daisy fleabane | Asteraceae
|
| ERBEB | Erigeron bellidiastrum Nutt. var. bellidiastrum | western daisy fleabane | Asteraceae
|
| ERBER | Erigeron bellidiastrum Nutt. var. robustus Cronq. | western daisy fleabane | Asteraceae
|
| ERBE2 | Erigeron bellidiastrum Nutt. | western daisy fleabane | Asteraceae
|
| ERBE6 | Erigeron bellioides DC. | bellorita | Asteraceae
|
| ERBI3 | Erigeron bigelovii Gray | Bigelow's fleabane | Asteraceae
|
| ERBI5 | Erigeron bilboanus (Remy) Cabrera | Conyza floribunda | Asteraceae
|
| ERBI7 | Erigeron biolettii Greene | Biolett's erigeron | Asteraceae
|
| ERBI9 | Erigeron bistiensis Nesom & Hevron | Ojo Alamo fleabane | Asteraceae
|
| ERBL4 | Erigeron blochmaniae Greene | Blochman's erigeron | Asteraceae
|
| ERBLB | Erigeron bloomeri Gray var. bloomeri | scabland fleabane | Asteraceae
|
| ERBLN | Erigeron bloomeri Gray var. nudatus (Gray) Cronq. | scabland fleabane | Asteraceae
|
| ERBLP | Erigeron bloomeri Gray var. pubens Keck | scabland fleabane | Asteraceae
|
| ERBLT | Erigeron bloomeri Gray var. typicus Cronq. | Erigeron bloomeri var. bloomeri | Asteraceae
|
| ERBL | Erigeron bloomeri Gray | scabland fleabane | Asteraceae
|
| ERBO4 | Erigeron bonariensis L. | Conyza bonariensis | Asteraceae
|
| ERBR12 | Erigeron brandegeei Gray | Erigeron concinnus var. concinnus | Asteraceae
|
| ERBRB5 | Erigeron breweri Gray var. bisanctus Nesom | Brewer's erigeron | Asteraceae
|
| ERBRB | Erigeron breweri Gray var. breweri | Brewer's fleabane | Asteraceae
|
| ERBRC3 | Erigeron breweri Gray var. covillei (Greene) Nesom | Coville's erigeron | Asteraceae
|
| ERBRE | Erigeron breweri Gray var. elmeri Greene | Erigeron elmeri | Asteraceae
|
| ERBRJ | Erigeron breweri Gray var. jacinteus (Hall) Cronq. | Brewer's fleabane | Asteraceae
|
| ERBRK | Erigeron breweri Gray var. klamathensis Nesom | Klamath erigeron | Asteraceae
|
| ERBRP | Erigeron breweri Gray var. porphyreticus (M.E. Jones) Cronq. | Brewer's fleabane | Asteraceae
|
| ERBR4 | Erigeron breweri Gray | Brewer's fleabane | Asteraceae
|
| ERCAL | Erigeron caespitosus Nutt. var. laccoliticus M.E. Jones | Erigeron caespitosus | Asteraceae
|
| ERCA2 | Erigeron caespitosus Nutt. | tufted fleabane | Asteraceae
|
| ERCA21 | Erigeron callianthemus Greene | Erigeron peregrinus ssp. callianthemus var. callianthemus | Asteraceae
|
| ERCA3 | Erigeron calvus Coville | bald fleabane | Asteraceae
|
| ERCA10 | Erigeron canaani Welsh | Erigeron eatonii var. eatonii | Asteraceae
|
| ERCAG | Erigeron canadensis L. var. glabratus Gray | Conyza canadensis var. glabrata | Asteraceae
|
| ERCAP2 | Erigeron canadensis L. var. pusillus (Nutt.) Boivin, non Ahles | Conyza canadensis var. pusilla | Asteraceae
|
| ERCA20 | Erigeron canadensis L. | Conyza canadensis var. canadensis | Asteraceae
|