| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| ERGLM | Erigeron glabellus Nutt. var. mollis Gray | Erigeron subtrinervis var. subtrinervis | Asteraceae
|
| ERGLP | Erigeron glabellus Nutt. var. pubescens Hook. | streamside fleabane | Asteraceae
|
| ERGLP2 | Erigeron glabellus Nutt. var. pubescens auct. non Hook. p.p. | Erigeron asper | Asteraceae
|
| ERGLV | Erigeron glabellus Nutt. var. viscidus (Rydb.) Boivin | Erigeron formosissimus var. viscidus | Asteraceae
|
| ERGLY | Erigeron glabellus Nutt. var. yukonensis (Rydb.) Hult�n | Erigeron yukonensis | Asteraceae
|
| ERGL2 | Erigeron glabellus Nutt. | streamside fleabane | Asteraceae
|
| ERGL3 | Erigeron glaucus Ker-Gawl. | seaside fleabane | Asteraceae
|
| ERGO3 | Erigeron goodrichii Welsh | Uinta Mountain fleabane | Asteraceae
|
| ERGR2 | Erigeron gracilis Rydb. | quill fleabane | Asteraceae
|
| ERGRA | Erigeron grandiflorus Hook. ssp. arcticus Porsild | largeflower fleabane | Asteraceae
|
| ERGRG | Erigeron grandiflorus Hook. ssp. grandiflorus | largeflower fleabane | Asteraceae
|
| ERGRM2 | Erigeron grandiflorus Hook. ssp. muirii (Gray) Hult�n | Erigeron muirii | Asteraceae
|
| ERGR3 | Erigeron grandiflorus Hook. | largeflower fleabane | Asteraceae
|
| ERHE5 | Erigeron heliographis Nesom | Heliograph Peak fleabane | Asteraceae
|
| ERHE9 | Erigeron hessii Nesom | Hess' fleabane | Asteraceae
|
| ERHO3 | Erigeron howellii Gray | Howell's fleabane | Asteraceae
|
| ERHU3 | Erigeron hultenii Spongberg | Hulten's fleabane | Asteraceae
|
| ERHU | Erigeron humilis Graham | arctic alpine fleabane | Asteraceae
|
| ERHY2 | Erigeron hyperboreus Greene | tundra fleabane | Asteraceae
|
| ERHY5 | Erigeron hyssopifolius Michx. | hyssopleaf fleabane | Asteraceae
|
| ERINA | Erigeron inornatus (Gray) Gray var. angustatus Gray | Erigeron reductus var. angustatus | Asteraceae
|
| ERINB | Erigeron inornatus (Gray) Gray var. biolettii (Greene) Jepson | Erigeron biolettii | Asteraceae
|
| ERINC3 | Erigeron inornatus (Gray) Gray var. calidipetris Nesom | California rayless fleabane | Asteraceae
|
| ERINI | Erigeron inornatus (Gray) Gray var. inornatus | California rayless fleabane | Asteraceae
|
| ERINK | Erigeron inornatus (Gray) Gray var. keilii Nesom | Keil's erigeron | Asteraceae
|
| ERINR | Erigeron inornatus (Gray) Gray var. reductus Cronq. | Erigeron reductus var. reductus | Asteraceae
|
| ERINV | Erigeron inornatus (Gray) Gray var. viscidulus Gray | Erigeron petrophilus var. viscidulus | Asteraceae
|
| ERIN2 | Erigeron inornatus (Gray) Gray | California rayless fleabane | Asteraceae
|
| ERJA2 | Erigeron jamaicensis L. | Jamaican fleabane | Asteraceae
|
| ERJO2 | Erigeron jonesii Cronq. | Jones' fleabane | Asteraceae
|
| ERJU | Erigeron jucundus Greene | Erigeron acris ssp. debilis | Asteraceae
|
| ERKA | Erigeron kachinensis Welsh & Moore | kachina fleabane | Asteraceae
|
| ERKA3 | Erigeron kamtschaticus DC. | Erigeron acris ssp. kamtschaticus | Asteraceae
|
| ERKA2 | Erigeron karvinskianus DC. | Latin American fleabane | Asteraceae
|
| ERKU | Erigeron kuschei Eastw. | Chiricahua fleabane | Asteraceae
|
| ERLA17 | Erigeron lackschewitzii Nesom & W.A. Weber | Lackschewitz's fleabane | Asteraceae
|
| ERLA | Erigeron lanatus Hook. | woolly fleabane | Asteraceae
|
| ERLAD | Erigeron lassenianus Greene var. deficiens Cronq. | Mt. Lassen fleabane | Asteraceae
|
| ERLAL4 | Erigeron lassenianus Greene var. lassenianus | Mt. Lassen fleabane | Asteraceae
|
| ERLA2 | Erigeron lassenianus Greene | Mt. Lassen fleabane | Asteraceae
|
| ERLA14 | Erigeron latus (A. Nels. & J.F. Macbr.) Cronq. | broad fleabane | Asteraceae
|
| ERLE5 | Erigeron leibergii Piper | Leiberg's fleabane | Asteraceae
|
| ERLE6 | Erigeron leiomerus Gray | rockslide yellow fleabane | Asteraceae
|
| ERLE14 | Erigeron lemmonii Gray | Lemmon's fleabane | Asteraceae
|
| ERLIE | Erigeron linearis (Hook.) Piper var. elegantulus J.T. Howell | Erigeron elegantulus | Asteraceae
|
| ERLI | Erigeron linearis (Hook.) Piper | desert yellow fleabane | Asteraceae
|
| ERLI2 | Erigeron linifolius Willd. | Conyza bonariensis | Asteraceae
|
| ERLOW | Erigeron lobatus A. Nels. var. warnockii Shinners | Erigeron modestus | Asteraceae
|
| ERLO6 | Erigeron lobatus A. Nels. | lobed fleabane | Asteraceae
|
| ERLOL | Erigeron lonchophyllus Hook. var. laurentianus Victorin | Erigeron lonchophyllus | Asteraceae
|
| ERLO | Erigeron lonchophyllus Hook. | shortray fleabane | Asteraceae
|
| ERMA11 | Erigeron macranthus Nutt. | Erigeron speciosus var. macranthus | Asteraceae
|
| ERMAH | Erigeron maguirei Cronq. var. harrisonii Welsh | Erigeron maguirei | Asteraceae
|
| ERMA8 | Erigeron maguirei Cronq. | Maguire's fleabane | Asteraceae
|
| ERMA9 | Erigeron mancus Rydb. | depauperate fleabane | Asteraceae
|
| ERMA15 | Erigeron mariposanus Congdon | Mariposa erigeron | Asteraceae
|
| ERME2 | Erigeron melanocephalus (A. Nels.) A. Nels. | blackhead fleabane | Asteraceae
|
| ERME16 | Erigeron mendocinus Greene | Erigeron foliosus var. mendocinus | Asteraceae
|
| ERME7 | Erigeron mexiae K. Becker | Mex's fleabane | Asteraceae
|
| ERMI | Erigeron mimegletes Shinners | Erigeron versicolor | Asteraceae
|
| ERMI10 | Erigeron minor (Hook.) Rydb. | Erigeron lonchophyllus | Asteraceae
|
| ERMI2 | Erigeron miser Gray | starved fleabane | Asteraceae
|
| ERMO2 | Erigeron modestus Gray | plains fleabane | Asteraceae
|
| ERMU8 | Erigeron muirii Gray | Muir's fleabane | Asteraceae
|
| ERMU2 | Erigeron multiceps Greene | Kern River fleabane | Asteraceae
|
| ERMY | Erigeron myrionactis Small | Erigeron procumbens | Asteraceae
|
| ERNA5 | Erigeron nanus Nutt. | dwarf fleabane | Asteraceae
|
| ERNA6 | Erigeron nauseosus (M.E. Jones) A. Nels. | Marysvale fleabane | Asteraceae
|
| ERNE2 | Erigeron nematophyllus Rydb. | needleleaf fleabane | Asteraceae
|
| ERNE3 | Erigeron neomexicanus Gray | New Mexico fleabane | Asteraceae
|
| ERNES | Erigeron nevadensis S.F. Blake var. sonnei (Greene) Smilty | Erigeron eatonii var. sonnei | Asteraceae
|
| ERNE10 | Erigeron nevadincola S.F. Blake | Erigeron eatonii var. nevadincola | Asteraceae
|
| ERNI6 | Erigeron nivalis Nutt. | Erigeron acris ssp. debilis | Asteraceae
|
| ERNU7 | Erigeron nudiflorus Buckl. | Erigeron flagellaris | Asteraceae
|
| EROB4 | Erigeron oblanceolatus Rydb. | Erigeron glabellus var. glabellus | Asteraceae
|
| EROCO | Erigeron ochroleucus Nutt. var. ochroleucus | buff fleabane | Asteraceae
|
| EROCS2 | Erigeron ochroleucus Nutt. var. scribneri (Canby ex Rydb.) Cronq. | buff fleabane | Asteraceae
|
| EROC | Erigeron ochroleucus Nutt. | buff fleabane | Asteraceae
|
| EROL | Erigeron oligodontus Lunell | Erigeron glabellus var. pubescens | Asteraceae
|
| EROR2 | Erigeron oreganus Gray | gorge fleabane | Asteraceae
|
| EROR5 | Erigeron oreophilus Greenm. | chaparral fleabane | Asteraceae
|
| EROR6 | Erigeron ortegae Blake | Chloracantha spinosa | Asteraceae
|
| EROV2 | Erigeron ovinus Cronq. | sheep fleabane | Asteraceae
|
| EROX4 | Erigeron oxyodontus Lunell | fleabane | Asteraceae
|
| EROX2 | Erigeron oxyphyllus Greene | wand fleabane | Asteraceae
|
| ERPA3 | Erigeron parishii Gray | Parish's fleabane | Asteraceae
|
| ERPA17 | Erigeron parryi Canby & Rose | Erigeron ochroleucus var. ochroleucus | Asteraceae
|
| ERPEC2 | Erigeron peregrinus (Banks ex Pursh) Greene ssp. callianthemus (Greene) Cronq. var. callianthemus | subalpine fleabane | Asteraceae
|
| ERPEH | Erigeron peregrinus (Banks ex Pursh) Greene ssp. callianthemus (Greene) Cronq. var. hirsutus Cronq. | subalpine fleabane | Asteraceae
|
| ERPEC | Erigeron peregrinus (Banks ex Pursh) Greene ssp. callianthemus (Greene) Cronq. | subalpine fleabane | Asteraceae
|
| ERPED2 | Erigeron peregrinus (Banks ex Pursh) Greene ssp. peregrinus var. dawsonii Greene | subalpine fleabane | Asteraceae
|
| ERPEP3 | Erigeron peregrinus (Banks ex Pursh) Greene ssp. peregrinus var. peregrinus | subalpine fleabane | Asteraceae
|
| ERPET2 | Erigeron peregrinus (Banks ex Pursh) Greene ssp. peregrinus var. thompsonii (Blake ex J.W. Thompson) Cronq. | subalpine fleabane | Asteraceae
|
| ERPEP | Erigeron peregrinus (Banks ex Pursh) Greene ssp. peregrinus | subalpine fleabane | Asteraceae
|
| ERPEA2 | Erigeron peregrinus (Banks ex Pursh) Greene var. angustifolius (Gray) Cronq. | Erigeron peregrinus ssp. callianthemus var. callianthemus | Asteraceae
|
| ERPEE | Erigeron peregrinus (Banks ex Pursh) Greene var. eucallianthemus Cronq. | Erigeron peregrinus ssp. callianthemus var. callianthemus | Asteraceae
|
| ERPES3 | Erigeron peregrinus (Banks ex Pursh) Greene var. scaposus (Torr. & Gray) Cronq. | Erigeron peregrinus ssp. callianthemus var. callianthemus | Asteraceae
|
| ERPE3 | Erigeron peregrinus (Banks ex Pursh) Greene | subalpine fleabane | Asteraceae
|
| ERPE11 | Erigeron perglaber Blake | Erigeron concinnus var. subglaber | Asteraceae
|
| ERPE4 | Erigeron petiolaris Greene | Erigeron algidus | Asteraceae
|
| ERPEP4 | Erigeron petrophilus Greene var. petrophilus | rockloving erigeron | Asteraceae
|