| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| ERBU2 | Eriogonum butterworthianum J.T. Howell | Butterworth's buckwheat | Polygonaceae
|
| ERCAA4 | Eriogonum caespitosum Nutt. var. acaule (Nutt.) R.J. Davis | Eriogonum acaule | Polygonaceae
|
| ERCAD | Eriogonum caespitosum Nutt. var. douglasii (Benth.) M.E. Jones | Eriogonum douglasii var. douglasii | Polygonaceae
|
| ERCA8 | Eriogonum caespitosum Nutt. | matted buckwheat | Polygonaceae
|
| ERCA18 | Eriogonum campanulatum Nutt. | Eriogonum brevicaule var. brevicaule | Polygonaceae
|
| ERCA27 | Eriogonum caninum (Greene) Munz | Eriogonum luteolum var. caninum | Polygonaceae
|
| ERCA11 | Eriogonum capillare Small | San Carlos buckwheat | Polygonaceae
|
| ERCAC3 | Eriogonum capistratum Reveal var. capistratum | hidden buckwheat | Polygonaceae
|
| ERCAM2 | Eriogonum capistratum Reveal var. muhlickii Reveal | Muhlick's buckwheat | Polygonaceae
|
| ERCAW2 | Eriogonum capistratum Reveal var. welshii Reveal | Welsh's buckwheat | Polygonaceae
|
| ERCA17 | Eriogonum capistratum Reveal | hidden buckwheat | Polygonaceae
|
| ERCA26 | Eriogonum carneum (J.T. Howell) Reveal | Eriogonum glandulosum | Polygonaceae
|
| ERCEA | Eriogonum cernuum Nutt. ssp. acutangulum (Gandog.) S. Stokes | Eriogonum maculatum | Polygonaceae
|
| ERCET | Eriogonum cernuum Nutt. ssp. tenue (Torr. & Gray) S. Stokes | Eriogonum cernuum var. cernuum | Polygonaceae
|
| ERCEV2 | Eriogonum cernuum Nutt. ssp. viminale S. Stokes | Eriogonum cernuum var. viminale | Polygonaceae
|
| ERCEC | Eriogonum cernuum Nutt. var. cernuum | nodding buckwheat | Polygonaceae
|
| ERCET2 | Eriogonum cernuum Nutt. var. tenue Torr. & Gray | Eriogonum cernuum var. cernuum | Polygonaceae
|
| ERCEV | Eriogonum cernuum Nutt. var. viminale (S. Stokes) Reveal | nodding buckwheat | Polygonaceae
|
| ERCE2 | Eriogonum cernuum Nutt. | nodding buckwheat | Polygonaceae
|
| ERCHA4 | Eriogonum chrysocephalum Gray ssp. alpestre S. Stokes | Eriogonum panguicense var. alpestre | Polygonaceae
|
| ERCHB2 | Eriogonum chrysocephalum Gray ssp. bannockense S. Stokes | Eriogonum brevicaule var. laxifolium | Polygonaceae
|
| ERCHC2 | Eriogonum chrysocephalum Gray ssp. cusickii (M.E. Jones) S. Stokes | Eriogonum cusickii | Polygonaceae
|
| ERCHD | Eriogonum chrysocephalum Gray ssp. desertorum Maguire | Eriogonum desertorum | Polygonaceae
|
| ERCH13 | Eriogonum chrysocephalum Gray | Eriogonum brevicaule var. laxifolium | Polygonaceae
|
| ERCH6 | Eriogonum chrysops Rydb. | bitterroot buckwheat | Polygonaceae
|
| ERCI5 | Eriogonum cinereum Benth. | coastal buckwheat | Polygonaceae
|
| ERCIA | Eriogonum cithariforme S. Wats. var. agninum (Greene) Reveal | Cithara buckwheat | Polygonaceae
|
| ERCIC3 | Eriogonum cithariforme S. Wats. var. cithariforme | Cithara buckwheat | Polygonaceae
|
| ERCI8 | Eriogonum cithariforme S. Wats. | Cithara buckwheat | Polygonaceae
|
| ERCL2 | Eriogonum clavellatum Small | Comb Wash buckwheat | Polygonaceae
|
| ERCL4 | Eriogonum clutei Rydb. | Eriogonum deflexum var. deflexum | Polygonaceae
|
| ERCO43 | Eriogonum codium Reveal, Caplow, & K. Beck | basalt desert buckwheat | Polygonaceae
|
| ERCO31 | Eriogonum cognatum Greene | Eriogonum umbellatum var. cognatum | Polygonaceae
|
| ERCO10 | Eriogonum collinum S. Stokes ex M.E. Jones | hill buckwheat | Polygonaceae
|
| ERCO11 | Eriogonum coloradense Small | Colorado buckwheat | Polygonaceae
|
| ERCO36 | Eriogonum commixtum Greene ex Tidestrom | Eriogonum baileyi var. praebens | Polygonaceae
|
| ERCOC8 | Eriogonum compositum Dougl. ex Benth. var. compositum | arrowleaf buckwheat | Polygonaceae
|
| ERCOL | Eriogonum compositum Dougl. ex Benth. var. lancifolium St. John & Warren | arrowleaf buckwheat | Polygonaceae
|
| ERCOL2 | Eriogonum compositum Dougl. ex Benth. var. leianthum Hook. | arrowleaf buckwheat | Polygonaceae
|
| ERCO12 | Eriogonum compositum Dougl. ex Benth. | arrowleaf buckwheat | Polygonaceae
|
| ERCO18 | Eriogonum concinnum Reveal | mourning buckwheat | Polygonaceae
|
| ERCO19 | Eriogonum congdonii (S. Stokes) Reveal | Congdon's buckwheat | Polygonaceae
|
| ERCO20 | Eriogonum contiguum (Reveal) Reveal | Reveal's buckwheat | Polygonaceae
|
| ERCO13 | Eriogonum contortum Small | grand buckwheat | Polygonaceae
|
| ERCO21 | Eriogonum correllii Reveal | Correll's buckwheat | Polygonaceae
|
| ERCOA2 | Eriogonum corymbosum Benth. var. albiflorum (Reveal) Welsh | Eriogonum thompsoniae var. albiflorum | Polygonaceae
|
| ERCOA4 | Eriogonum corymbosum Benth. var. albogilvum Reveal | Eriogonum duchesnense | Polygonaceae
|
| ERCOA6 | Eriogonum corymbosum Benth. var. atwoodii (Reveal) Welsh | Eriogonum thompsoniae var. atwoodii | Polygonaceae
|
| ERCOA | Eriogonum corymbosum Benth. var. aureum (M.E. Jones) Reveal | crispleaf buckwheat | Polygonaceae
|
| ERCOC9 | Eriogonum corymbosum Benth. var. corymbosum | crispleaf buckwheat | Polygonaceae
|
| ERCOC10 | Eriogonum corymbosum Benth. var. cronquistii (Reveal) Welsh | Eriogonum cronquistii | Polygonaceae
|
| ERCOD2 | Eriogonum corymbosum Benth. var. davidsei Reveal | Eriogonum lancifolium | Polygonaceae
|
| ERCOD3 | Eriogonum corymbosum Benth. var. divaricatum Torr. & Gray | Eriogonum corymbosum var. corymbosum | Polygonaceae
|
| ERCOE | Eriogonum corymbosum Benth. var. erectum Reveal & Brotherson | Eriogonum corymbosum var. corymbosum | Polygonaceae
|
| ERCOG2 | Eriogonum corymbosum Benth. var. glutinosum (M.E. Jones) M.E. Jones | crispleaf buckwheat | Polygonaceae
|
| ERCOH3 | Eriogonum corymbosum Benth. var. humivagans (Reveal) Welsh | Eriogonum lonchophyllum var. lonchophyllum | Polygonaceae
|
| ERCOH2 | Eriogonum corymbosum Benth. var. hylophilum (Reveal & Brotherson) Welsh | Eriogonum hylophilum | Polygonaceae
|
| ERCOM | Eriogonum corymbosum Benth. var. matthewsiae Reveal | Eriogonum thompsoniae var. matthewsiae | Polygonaceae
|
| ERCOO | Eriogonum corymbosum Benth. var. orbiculatum (S. Stokes) Reveal & Brotherson | crispleaf buckwheat | Polygonaceae
|
| ERCOR | Eriogonum corymbosum Benth. var. revealianum (Welsh) Reveal | crispleaf buckwheat | Polygonaceae
|
| ERCOS2 | Eriogonum corymbosum Benth. var. smithii (Reveal) Welsh | Eriogonum smithii | Polygonaceae
|
| ERCOT4 | Eriogonum corymbosum Benth. var. thompsoniae (S. Wats.) Welsh | Eriogonum thompsoniae var. thompsoniae | Polygonaceae
|
| ERCOV | Eriogonum corymbosum Benth. var. velutinum Reveal | crispleaf buckwheat | Polygonaceae
|
| ERCO14 | Eriogonum corymbosum Benth. | crispleaf buckwheat | Polygonaceae
|
| ERCOA5 | Eriogonum covilleanum Eastw. ssp. adsurgens (Jepson) Abrams | Eriogonum eastwoodianum | Polygonaceae
|
| ERCO17 | Eriogonum covilleanum Eastw. | Coville's buckwheat | Polygonaceae
|
| ERCO37 | Eriogonum covillei Small | Eriogonum umbellatum var. covillei | Polygonaceae
|
| ERCR3 | Eriogonum crocatum A. Davids. | Conejo buckwheat | Polygonaceae
|
| ERCR5 | Eriogonum cronquistii Reveal | Bull Mountain buckwheat | Polygonaceae
|
| ERCR10 | Eriogonum crosbyae Reveal | Crosby's buckwheat | Polygonaceae
|
| ERCU3 | Eriogonum cusickii M.E. Jones | Cusick's buckwheat | Polygonaceae
|
| ERCY3 | Eriogonum cyclosepalum Greene | Eriogonum abertianum var. cyclosepalum | Polygonaceae
|
| ERDA | Eriogonum darrovii Kearney | Darrow's buckwheat | Polygonaceae
|
| ERDA2 | Eriogonum dasyanthemum Torr. & Gray | chaparral buckwheat | Polygonaceae
|
| ERDA4 | Eriogonum davidsonii Greene | Davidson's buckwheat | Polygonaceae
|
| ERDA5 | Eriogonum davisianum S. Stokes | Eriogonum ovalifolium var. purpureum | Polygonaceae
|
| ERDEB3 | Eriogonum deflexum Torr. ssp. baratum (Elmer) Munz | Eriogonum deflexum var. baratum | Polygonaceae
|
| ERDEE2 | Eriogonum deflexum Torr. ssp. exaltatum (M.E. Jones) S. Stokes | Eriogonum insigne | Polygonaceae
|
| ERDEI2 | Eriogonum deflexum Torr. ssp. insigne (S. Wats.) S. Stokes | Eriogonum insigne | Polygonaceae
|
| ERDER4 | Eriogonum deflexum Torr. ssp. rixfordii (S. Stokes) Munz | Eriogonum rixfordii | Polygonaceae
|
| ERDEU | Eriogonum deflexum Torr. ssp. ultrum S. Stokes | Eriogonum nutans var. nutans | Polygonaceae
|
| ERDEW | Eriogonum deflexum Torr. ssp. watsonii (Torr. & Gray) S. Stokes | Eriogonum watsonii | Polygonaceae
|
| ERDEB | Eriogonum deflexum Torr. var. baratum (Elmer) Reveal | flatcrown buckwheat | Polygonaceae
|
| ERDEB2 | Eriogonum deflexum Torr. var. brachypodum (Torr. & Gray) Munz | Eriogonum brachypodum | Polygonaceae
|
| ERDED4 | Eriogonum deflexum Torr. var. deflexum | flatcrown buckwheat | Polygonaceae
|
| ERDEM3 | Eriogonum deflexum Torr. var. multipedunculatum (S. Stokes) C.L. Hitchc. | Eriogonum watsonii | Polygonaceae
|
| ERDEN | Eriogonum deflexum Torr. var. nevadense Reveal | Nevada buckwheat | Polygonaceae
|
| ERDER3 | Eriogonum deflexum Torr. var. rectum Reveal | flatcrown buckwheat | Polygonaceae
|
| ERDET | Eriogonum deflexum Torr. var. turbinatum (Small) Reveal | Eriogonum deflexum var. deflexum | Polygonaceae
|
| ERDEW2 | Eriogonum deflexum Torr. var. watsonii (Torr. & Gray) R.J. Davis | Eriogonum watsonii | Polygonaceae
|
| ERDE6 | Eriogonum deflexum Torr. | flatcrown buckwheat | Polygonaceae
|
| ERDEF | Eriogonum dendroideum (Nutt.) S. Stokes var. foliosum (Nutt.) M.E. Jones | Oxytheca dendroidea | Polygonaceae
|
| ERDEH | Eriogonum dendroideum (Nutt.) S. Stokes var. hillmanii S. Stokes | Oxytheca dendroidea | Polygonaceae
|
| ERDE13 | Eriogonum dendroideum (Nutt.) S. Stokes | Oxytheca dendroidea | Polygonaceae
|
| ERDE7 | Eriogonum densum Greene | Eriogonum polycladon | Polygonaceae
|
| ERDE14 | Eriogonum depauperatum Small | Eriogonum pauciflorum var. pauciflorum | Polygonaceae
|
| ERDE9 | Eriogonum deserticola S. Wats. | Colorado Desert buckwheat | Polygonaceae
|
| ERDE11 | Eriogonum desertorum (Maguire) R.J. Davis | Great Basin Desert buckwheat | Polygonaceae
|
| ERDI10 | Eriogonum diclinum Reveal | Jaynes Canyon buckwheat | Polygonaceae
|
| ERDI5 | Eriogonum divaricatum Hook. | divergent buckwheat | Polygonaceae
|
| ERDI13 | Eriogonum divergens Small | Eriogonum corymbosum var. corymbosum | Polygonaceae
|