| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| ERUN80 | Erigeron unalaschkensis (DC.) Vierh. | Erigeron humilis | Asteraceae
|
| ERUN6 | Erigeron unalaschkensis Less. | Erigeron peregrinus ssp. peregrinus var. peregrinus | Asteraceae
|
| ERUNC | Erigeron uncialis Blake ssp. conjugans (Blake) Cronq. | lone fleabane | Asteraceae
|
| ERUNU | Erigeron uncialis Blake ssp. uncialis | lone fleabane | Asteraceae
|
| ERUNC2 | Erigeron uncialis Blake var. conjugans Blake | Erigeron uncialis ssp. conjugans | Asteraceae
|
| ERUN2 | Erigeron uncialis Blake | lone fleabane | Asteraceae
|
| ERUNE | Erigeron uniflorus L. ssp. eriocephalus (J. Vahl) Cronq. | oneflower fleabane | Asteraceae
|
| ERUNE2 | Erigeron uniflorus L. var. eriocephalus (J. Vahl) Boivin | Erigeron uniflorus ssp. eriocephalus | Asteraceae
|
| ERUNM | Erigeron uniflorus L. var. melanocephalus A. Nels. | Erigeron melanocephalus | Asteraceae
|
| ERUNU2 | Erigeron uniflorus L. var. unalaschkensis (DC.) Ostenf. | Erigeron humilis | Asteraceae
|
| ERUN4 | Erigeron uniflorus L. | oneflower fleabane | Asteraceae
|
| ERUN5 | Erigeron untermannii Welsh & Goodrich | Indian Canyon fleabane | Asteraceae
|
| ERUR2 | Erigeron ursinus D.C. Eat. | Bear River fleabane | Asteraceae
|
| ERUTS | Erigeron utahensis Gray var. sparsifolius (Eastw.) Cronq. | Utah fleabane | Asteraceae
|
| ERUTT | Erigeron utahensis Gray var. tetrapleuris (Gray) Cronq. | Erigeron utahensis var. utahensis | Asteraceae
|
| ERUTU | Erigeron utahensis Gray var. utahensis | Utah fleabane | Asteraceae
|
| ERUT | Erigeron utahensis Gray | Utah fleabane | Asteraceae
|
| ERVA3 | Erigeron vagus Payson | rambling fleabane | Asteraceae
|
| ERVE11 | Erigeron velutipes Hook. & Arn. | Chihuahuan fleabane | Asteraceae
|
| ERVE | Erigeron vernus (L.) Torr. & Gray | early whitetop fleabane | Asteraceae
|
| ERVE13 | Erigeron versicolor (Greenm.) Nesom | changing fleabane | Asteraceae
|
| ERVE2 | Erigeron vetensis Rydb. | early bluetop fleabane | Asteraceae
|
| ERVI15 | Erigeron viscidus Rydb. | Erigeron formosissimus var. viscidus | Asteraceae
|
| ERVR | Erigeron vreelandii Greene | Vreeland's erigeron | Asteraceae
|
| ERWA6 | Erigeron wahwahensis Welsh | Erigeron jonesii | Asteraceae
|
| ERWA | Erigeron warnockii (Shinners) Shinners | Erigeron modestus | Asteraceae
|
| ERWA5 | Erigeron watsonii (Gray) Cronq. | Watson's fleabane | Asteraceae
|
| ERWI2 | Erigeron wilkenii O'Kane | Dieter's erigeron | Asteraceae
|
| ERWY | Erigeron wyomingia Rydb. | Erigeron pulcherrimus | Asteraceae
|
| ERYU2 | Erigeron yukonensis Rydb. | Yukon fleabane | Asteraceae
|
| ERZO | Erigeron zothecinus Welsh | Lake Powell fleabane | Asteraceae
|
| ERIGE2 | Erigeron L. | fleabane | Asteraceae
|
| ERVE9 | Erinus verticillatus P. Mill. | Stemodia verticillata | Scrophulariaceae
|
| ERJA3 | Eriobotrya japonica (Thunb.) Lindl. | loquat | Rosaceae
|
| ERIOB | Eriobotrya Lindl. | loquat | Rosaceae
|
| ERAU5 | Eriocarpum australe Greene | Machaeranthera pinnatifida ssp. pinnatifida var. pinnatifida | Asteraceae
|
| ERCO30 | Eriocarpum coloradoense (Gray) Greene | Machaeranthera coloradoensis var. coloradoensis | Asteraceae
|
| ERGR14 | Eriocarpum grindelioides Nutt. | Machaeranthera grindelioides var. grindelioides | Asteraceae
|
| ERME13 | Eriocarpum megacephalum Nash | Rayjacksonia phyllocephala | Asteraceae
|
| ERSP14 | Eriocarpum spinulosum (Pursh) Greene | Machaeranthera pinnatifida ssp. pinnatifida var. pinnatifida | Asteraceae
|
| ERWO | Eriocarpum wootonii Greene | Machaeranthera pinnatifida ssp. pinnatifida var. pinnatifida | Asteraceae
|
| ERAN9 | Eriocaulon anceps Walt. | Lachnocaulon anceps | Eriocaulaceae
|
| ERAQ2 | Eriocaulon aquaticum (Hill) Druce | sevenangle pipewort | Eriocaulaceae
|
| ERBE11 | Eriocaulon benthamii Kunth | Bentham's pipewort | Eriocaulaceae
|
| ERCI4 | Eriocaulon cinereum R. Br. | ashy pipewort | Eriocaulaceae
|
| ERCOH | Eriocaulon compressum Lam. var. harperi Moldenke | Eriocaulon compressum | Eriocaulaceae
|
| ERCO7 | Eriocaulon compressum Lam. | flattened pipewort | Eriocaulaceae
|
| ERDED2 | Eriocaulon decangulare L. var. decangulare | tenangle pipewort | Eriocaulaceae
|
| ERDEL | Eriocaulon decangulare L. var. latifolium Chapman | tenangle pipewort | Eriocaulaceae
|
| ERDEM4 | Eriocaulon decangulare L. var. minor Moldenke | Eriocaulon decangulare var. decangulare | Eriocaulaceae
|
| ERDE5 | Eriocaulon decangulare L. | tenangle pipewort | Eriocaulaceae
|
| ERFL13 | Eriocaulon flavidulus Michx. | Syngonanthus flavidulus | Eriocaulaceae
|
| ERKO | Eriocaulon koernickianum van Heurck & Muell.-Arg. | gulf pipewort | Eriocaulaceae
|
| ERLIG | Eriocaulon lineare Small var. gigas Moldenke | Eriocaulon lineare | Eriocaulaceae
|
| ERLI3 | Eriocaulon lineare Small | narrow pipewort | Eriocaulaceae
|
| ERLO7 | Eriocaulon longifolium Nees ex Kunth | pipewort | Eriocaulaceae
|
| ERMI7 | Eriocaulon microcephalum Kunth | smallhead pipewort | Eriocaulaceae
|
| ERNI7 | Eriocaulon nigrobracteatum Bridges & Orzell | blackbract pipewort | Eriocaulaceae
|
| ERPA4 | Eriocaulon parkeri B.L. Robins. | estuary pipewort | Eriocaulaceae
|
| ERPE13 | Eriocaulon pellucidum Michx. | Eriocaulon aquaticum | Eriocaulaceae
|
| ERRA7 | Eriocaulon ravenelii Chapman | Ravenel's pipewort | Eriocaulaceae
|
| ERRO11 | Eriocaulon rollandii Rouss. | Eriocaulon parkeri | Eriocaulaceae
|
| ERSEP | Eriocaulon septangulare Withering var. parkeri (B.L. Robins.) Boivin & Cayouette | Eriocaulon parkeri | Eriocaulaceae
|
| ERSE4 | Eriocaulon septangulare Withering | Eriocaulon aquaticum | Eriocaulaceae
|
| ERTE8 | Eriocaulon texense Koern. | Texas pipewort | Eriocaulaceae
|
| ERIOC | Eriocaulon L. | pipewort | Eriocaulaceae
|
| ERMA16 | Eriocereus martinii Riccob. | Harrisia martinii | Cactaceae
|
| ERACA | Eriochloa acuminata (J. Presl) Kunth var. acuminata | tapertip cupgrass | Poaceae
|
| ERACM | Eriochloa acuminata (J. Presl) Kunth var. minor (Vasey) R.B. Shaw | tapertip cupgrass | Poaceae
|
| ERAC4 | Eriochloa acuminata (J. Presl) Kunth | tapertip cupgrass | Poaceae
|
| ERAR5 | Eriochloa aristata Vasey | bearded cupgrass | Poaceae
|
| ERCO8 | Eriochloa contracta A.S. Hitchc. | prairie cupgrass | Poaceae
|
| ERFA3 | Eriochloa fatmensis (Hochst. & Steud.) W.D. Clayton | tropical cupgrass | Poaceae
|
| ERGRM | Eriochloa gracilis (Fourn.) A.S. Hitchc. var. minor (Vasey) A.S. Hitchc. | Eriochloa acuminata var. minor | Poaceae
|
| ERGR4 | Eriochloa gracilis (Fourn.) A.S. Hitchc. | Eriochloa acuminata var. acuminata | Poaceae
|
| ERLE20 | Eriochloa leersioides (Munro) Hack. | sharp cupgrass | Poaceae
|
| ERLEG | Eriochloa lemmonii Vasey & Scribn. var. gracilis (Fourn.) Gould | Eriochloa acuminata var. acuminata | Poaceae
|
| ERLE7 | Eriochloa lemmonii Vasey & Scribn. | canyon cupgrass | Poaceae
|
| ERMIM | Eriochloa michauxii (Poir.) A.S. Hitchc. var. michauxii | longleaf cupgrass | Poaceae
|
| ERMIS | Eriochloa michauxii (Poir.) A.S. Hitchc. var. simpsonii A.S. Hitchc. | Simpson's cupgrass | Poaceae
|
| ERMI3 | Eriochloa michauxii (Poir.) A.S. Hitchc. | longleaf cupgrass | Poaceae
|
| ERNU80 | Eriochloa nubica (Steud.) Thellung | Eriochloa fatmensis | Poaceae
|
| ERPO3 | Eriochloa polystachya Kunth | Caribgrass | Poaceae
|
| ERPR2 | Eriochloa procera auct. non (Retz.) C.E. Hubbard | Eriochloa fatmensis | Poaceae
|
| ERPS80 | Eriochloa pseudoacrotricha (Stapf ex Thellung) C.E. Hubbard ex S.T. Blake | perennial cupgrass | Poaceae
|
| ERPUM | Eriochloa punctata (L.) Desv. ex Hamilton var. minor Vasey | Eriochloa acuminata var. minor | Poaceae
|
| ERPU4 | Eriochloa punctata (L.) Desv. ex Hamilton | Louisiana cupgrass | Poaceae
|
| ERRAP | Eriochloa ramosa (Retz.) Kuntze var. pseudoacrotricha Stapf ex Thellung | Eriochloa pseudoacrotricha | Poaceae
|
| ERSE5 | Eriochloa sericea (Scheele) Munro ex Vasey | Texas cupgrass | Poaceae
|
| ERSU10 | Eriochloa subglabra (Nash) A.S. Hitchc. | Eriochloa polystachya | Poaceae
|
| ERVI3 | Eriochloa villosa (Thunb.) Kunth | hairy cupgrass | Poaceae
|
| ERIOC2 | Eriochloa Kunth | cupgrass | Poaceae
|
| ERCA16 | Eriochrysis cayennensis Beauv. | moco de pavo | Poaceae
|
| ERIOC3 | Eriochrysis Beauv. | moco de pavo | Poaceae
|
| ERCU9 | Eriocoma cuspidata Nutt. | Achnatherum hymenoides | Poaceae
|
| ERAN18 | Eriodendron anfractuosum DC. | Ceiba pentandra | Bombacaceae
|
| ERBO6 | Erioderma boreale Ahlner | Erioderma pedicellatum | Pannariaceae
|
| ERMO12 | Erioderma mollissimum (G. Sampaio) Du Rietz | | Pannariaceae
|
| ERPE17 | Erioderma pedicellatum (Hue) P. M. Jorg. | | Pannariaceae
|
| ERSO4 | Erioderma sorediatum D. J. Galloway & P. M. Jorg. | | Pannariaceae
|
| ERIOD2 | Erioderma Fee | erioderma | Pannariaceae
|