| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| ERDOS | Eriogonum douglasii Benth. var. sublineare (S. Stokes) Reveal | Douglas' buckwheat | Polygonaceae
|
| ERDOT | Eriogonum douglasii Benth. var. tenue (Small) C.L. Hitchc. | Eriogonum douglasii var. sublineare | Polygonaceae
|
| ERDO | Eriogonum douglasii Benth. | Douglas' buckwheat | Polygonaceae
|
| ERDU2 | Eriogonum �duchesnense Reveal (pro sp.) | | Polygonaceae
|
| ERDU3 | Eriogonum dudleyanum S. Stokes | Eriogonum nummulare | Polygonaceae
|
| EREA2 | Eriogonum eastwoodianum J.T. Howell | Eastwood's buckwheat | Polygonaceae
|
| EREFD | Eriogonum effusum Nutt. ssp. durum S. Stokes | Eriogonum corymbosum var. corymbosum | Polygonaceae
|
| EREFN | Eriogonum effusum Nutt. ssp. nelsonii (L.O. Williams) S. Stokes | Eriogonum corymbosum var. aureum | Polygonaceae
|
| EREFO | Eriogonum effusum Nutt. ssp. orbiculatum S. Stokes | Eriogonum corymbosum var. orbiculatum | Polygonaceae
|
| EREFS | Eriogonum effusum Nutt. ssp. salinum (A. Nels.) S. Stokes | Eriogonum corymbosum var. corymbosum | Polygonaceae
|
| EREFA | Eriogonum effusum Nutt. var. ambiguum (M.E. Jones) S. Stokes | Eriogonum microthecum var. ambiguum | Polygonaceae
|
| EREFE | Eriogonum effusum Nutt. var. effusum | spreading buckwheat | Polygonaceae
|
| EREFL | Eriogonum effusum Nutt. var. leptophyllum Torr. & Gray | Eriogonum leptophyllum | Polygonaceae
|
| EREFR | Eriogonum effusum Nutt. var. rosmarinoides Benth. | spreading buckwheat | Polygonaceae
|
| EREFS2 | Eriogonum effusum Nutt. var. shandsii S. Stokes | Eriogonum leptocladon var. leptocladon | Polygonaceae
|
| EREF | Eriogonum effusum Nutt. | spreading buckwheat | Polygonaceae
|
| ERELG | Eriogonum elatum Dougl. ex Benth. ssp. glabrescens S. Stokes | Eriogonum latens | Polygonaceae
|
| ERELV2 | Eriogonum elatum Dougl. ex Benth. ssp. villosum (Jepson) Munz ex Reveal | Eriogonum elatum var. villosum | Polygonaceae
|
| ERELE | Eriogonum elatum Dougl. ex Benth. var. elatum | tall woolly buckwheat | Polygonaceae
|
| ERELV | Eriogonum elatum Dougl. ex Benth. var. villosum Jepson | tall woolly buckwheat | Polygonaceae
|
| EREL5 | Eriogonum elatum Dougl. ex Benth. | tall woolly buckwheat | Polygonaceae
|
| EREL8 | Eriogonum elegans Greene | elegant buckwheat | Polygonaceae
|
| EREL6 | Eriogonum elongatum Benth. | longstem buckwheat | Polygonaceae
|
| EREP | Eriogonum ephedroides Reveal | ephedra buckwheat | Polygonaceae
|
| ERER4 | Eriogonum eremicola J.T. Howell & Reveal | Telescope Peak buckwheat | Polygonaceae
|
| ERER5 | Eriogonum eremicum Reveal | limestone buckwheat | Polygonaceae
|
| ERERT2 | Eriogonum ericifolium Torr. & Gray ssp. thornei (Reveal & Henrickson) Thorne | Eriogonum ericifolium var. thornei | Polygonaceae
|
| ERERE2 | Eriogonum ericifolium Torr. & Gray var. ericifolium | Yavapai County buckwheat | Polygonaceae
|
| ERERP | Eriogonum ericifolium Torr. & Gray var. pulchrum (Eastw.) Reveal | Yavapai County buckwheat | Polygonaceae
|
| ERERT | Eriogonum ericifolium Torr. & Gray var. thornei Reveal & Henrickson | Thorne's buckwheat | Polygonaceae
|
| ERER6 | Eriogonum ericifolium Torr. & Gray | Yavapai County buckwheat | Polygonaceae
|
| ERESE | Eriogonum esmeraldense S. Wats. var. esmeraldense | Esmeralda buckwheat | Polygonaceae
|
| EREST | Eriogonum esmeraldense S. Wats. var. toiyabense J.T. Howell | Toiyabe buckwheat | Polygonaceae
|
| ERES | Eriogonum esmeraldense S. Wats. | Esmeralda buckwheat | Polygonaceae
|
| EREX | Eriogonum exaltatum M.E. Jones | Eriogonum insigne | Polygonaceae
|
| EREX2 | Eriogonum exilifolium Reveal | dropleaf buckwheat | Polygonaceae
|
| ERFAF4 | Eriogonum fasciculatum Benth. ssp. flavoviride (Munz & Johnston) S. Stokes | Eriogonum fasciculatum var. flavoviride | Polygonaceae
|
| ERFAF5 | Eriogonum fasciculatum Benth. ssp. foliolosum (Nutt.) S. Stokes | Eriogonum fasciculatum var. foliolosum | Polygonaceae
|
| ERFAP2 | Eriogonum fasciculatum Benth. ssp. polifolium (Benth.) S. Stokes | Eriogonum fasciculatum var. polifolium | Polygonaceae
|
| ERFAF3 | Eriogonum fasciculatum Benth. var. fasciculatum | Eastern Mojave buckwheat | Polygonaceae
|
| ERFAF | Eriogonum fasciculatum Benth. var. flavoviride Munz & Johnston | Eastern Mojave buckwheat | Polygonaceae
|
| ERFAF2 | Eriogonum fasciculatum Benth. var. foliolosum (Nutt.) S. Stokes ex Abrams | Eastern Mojave buckwheat | Polygonaceae
|
| ERFAP | Eriogonum fasciculatum Benth. var. polifolium (Benth.) Torr. & Gray | Eastern Mojave buckwheat | Polygonaceae
|
| ERFAR | Eriogonum fasciculatum Benth. var. revolutum (Goodding) S. Stokes | Eriogonum fasciculatum var. polifolium | Polygonaceae
|
| ERFA2 | Eriogonum fasciculatum Benth. | Eastern Mojave buckwheat | Polygonaceae
|
| ERFE | Eriogonum fendlerianum (Benth.) Small | Eriogonum lonchophyllum var. fendlerianum | Polygonaceae
|
| ERFI4 | Eriogonum filicaule S. Stokes | Eriogonum subreniforme | Polygonaceae
|
| ERFL10 | Eriogonum flavissimum Gandog. | Eriogonum strictum ssp. proliferum var. anserinum | Polygonaceae
|
| ERFLC | Eriogonum flavum Nutt. ssp. crassifolium (Benth.) S. Stokes | Eriogonum flavum var. flavum | Polygonaceae
|
| ERFLP3 | Eriogonum flavum Nutt. ssp. piperi (Greene) S. Stokes | Eriogonum flavum var. piperi | Polygonaceae
|
| ERFLA2 | Eriogonum flavum Nutt. var. androsaceum (Benth.) M.E. Jones | Eriogonum androsaceum | Polygonaceae
|
| ERFLA | Eriogonum flavum Nutt. var. aquilinum Reveal | alpine golden buckwheat | Polygonaceae
|
| ERFLC2 | Eriogonum flavum Nutt. var. crassifolium (Benth.) Benth. | Eriogonum flavum var. flavum | Polygonaceae
|
| ERFLF | Eriogonum flavum Nutt. var. flavum | alpine golden buckwheat | Polygonaceae
|
| ERFLL | Eriogonum flavum Nutt. var. linguifolium Gandog. | Eriogonum flavum var. piperi | Polygonaceae
|
| ERFLP | Eriogonum flavum Nutt. var. piperi (Greene) M.E. Jones | Piper's golden buckwheat | Polygonaceae
|
| ERFLP2 | Eriogonum flavum Nutt. var. polyphyllum (Small ex Rydb.) M.E. Jones | alpine golden buckwheat | Polygonaceae
|
| ERFLX | Eriogonum flavum Nutt. var. xanthum (Small) S. Stokes | Eriogonum jamesii var. xanthum | Polygonaceae
|
| ERFL4 | Eriogonum flavum Nutt. | alpine golden buckwheat | Polygonaceae
|
| ERFLF2 | Eriogonum flexum M.E. Jones var. ferronis M.E. Jones | Stenogonum flexum | Polygonaceae
|
| ERFL12 | Eriogonum flexum M.E. Jones | Stenogonum flexum | Polygonaceae
|
| ERFL11 | Eriogonum floridanum Small | Eriogonum longifolium var. gnaphalifolium | Polygonaceae
|
| ERFO4 | Eriogonum foliosum S. Wats. | Baja buckwheat | Polygonaceae
|
| ERFR5 | Eriogonum fruticulosum S. Stokes | Eriogonum sphaerocephalum var. fasciculifolium | Polygonaceae
|
| ERFU3 | Eriogonum fusiforme Small | Native American pipeweed | Polygonaceae
|
| ERGIC2 | Eriogonum giganteum S. Wats. ssp. compactum (Dunkle) Munz | Eriogonum giganteum var. compactum | Polygonaceae
|
| ERGIF2 | Eriogonum giganteum S. Wats. ssp. formosum (Brandeg.) Raven | Eriogonum giganteum var. formosum | Polygonaceae
|
| ERGIC | Eriogonum giganteum S. Wats. var. compactum Dunkle | Santa Barbara Island buckwheat | Polygonaceae
|
| ERGIF | Eriogonum giganteum S. Wats. var. formosum Brandeg. | San Clemente Island buckwheat | Polygonaceae
|
| ERGIG | Eriogonum giganteum S. Wats. var. giganteum | St. Catherine's lace | Polygonaceae
|
| ERGI2 | Eriogonum giganteum S. Wats. | St. Catherine's lace | Polygonaceae
|
| ERGI3 | Eriogonum gilmanii S. Stokes | Gilman's buckwheat | Polygonaceae
|
| ERGLC2 | Eriogonum glandulosum (Nutt.) Nutt. ex Benth. var. carneum J.T. Howell | Eriogonum glandulosum | Polygonaceae
|
| ERGL4 | Eriogonum glandulosum (Nutt.) Nutt. ex Benth. | acorn buckwheat | Polygonaceae
|
| ERGO | Eriogonum gordonii Benth. | Gordon's buckwheat | Polygonaceae
|
| ERGO2 | Eriogonum gossypinum Curran | cottony buckwheat | Polygonaceae
|
| ERGRC5 | Eriogonum gracile Benth. var. cithariforme (S. Wats.) Munz | Eriogonum cithariforme var. cithariforme | Polygonaceae
|
| ERGRG4 | Eriogonum gracile Benth. var. gracile | slender woolly buckwheat | Polygonaceae
|
| ERGRI | Eriogonum gracile Benth. var. incultum Reveal | slender woolly buckwheat | Polygonaceae
|
| ERGRP4 | Eriogonum gracile Benth. var. polygonoides (S. Stokes) Munz | Eriogonum cithariforme var. agninum | Polygonaceae
|
| ERGR5 | Eriogonum gracile Benth. | slender woolly buckwheat | Polygonaceae
|
| ERGR11 | Eriogonum gracilipes S. Wats. | White Mountain buckwheat | Polygonaceae
|
| ERGR6 | Eriogonum gracillimum S. Wats. | rose and white buckwheat | Polygonaceae
|
| ERGR18 | Eriogonum gramineum S. Stokes | Eriogonum nudum var. westonii | Polygonaceae
|
| ERGRR2 | Eriogonum grande Greene ssp. rubescens (Greene) Munz | Eriogonum grande var. rubescens | Polygonaceae
|
| ERGRT2 | Eriogonum grande Greene ssp. timorum (Reveal) Munz | Eriogonum grande var. timorum | Polygonaceae
|
| ERGRD | Eriogonum grande Greene var. dunklei Reveal | Eriogonum grande var. rubescens | Polygonaceae
|
| ERGRG5 | Eriogonum grande Greene var. grande | redflower buckwheat | Polygonaceae
|
| ERGRR | Eriogonum grande Greene var. rubescens (Greene) Munz | redflower buckwheat | Polygonaceae
|
| ERGRT | Eriogonum grande Greene var. timorum Reveal | San Nicolas Island buckwheat | Polygonaceae
|
| ERGR12 | Eriogonum grande Greene | redflower buckwheat | Polygonaceae
|
| ERGR13 | Eriogonum grayi Reveal | Eriogonum brevicaule var. laxifolium | Polygonaceae
|
| ERGR7 | Eriogonum greggii Torr. & Gray | Gregg's buckwheat | Polygonaceae
|
| ERGY | Eriogonum gypsophilum Woot. & Standl. | Seven River Hills buckwheat | Polygonaceae
|
| ERHA3 | Eriogonum harfordii Small | Eriogonum nudum var. oblongifolium | Polygonaceae
|
| ERHA2 | Eriogonum harperi Goodman | Eriogonum longifolium var. harperi | Polygonaceae
|
| ERHA | Eriogonum havardii S. Wats. | Havard's buckwheat | Polygonaceae
|
| ERHEA3 | Eriogonum heermannii Dur. & Hilg. ssp. argense (M.E. Jones) Munz | Eriogonum heermannii var. argense | Polygonaceae
|
| ERHEF2 | Eriogonum heermannii Dur. & Hilg. ssp. floccosum (Munz) Munz | Eriogonum heermannii var. floccosum | Polygonaceae
|
| ERHEH4 | Eriogonum heermannii Dur. & Hilg. ssp. humilius S. Stokes | Eriogonum heermannii var. humilius | Polygonaceae
|
| ERHES3 | Eriogonum heermannii Dur. & Hilg. ssp. sulcatum (S. Wats.) S. Stokes | Eriogonum heermannii var. sulcatum | Polygonaceae
|