Eriogonum heermannii (Heermann's buckwheat)

Plate 1 figs. a–h · 8 separate observations

Eriogonum heermannii, photographed by CK2AZ — fig. a CK2AZ, CC BY 4.0 / 2022-04-08 / obs. 188285773

Eriogonum heermannii, photographed by Bobby McCabe — fig. b Bobby McCabe, CC BY 4.0 / obs. 180637045

Eriogonum heermannii, photographed by Billy — fig. c Billy, CC BY 4.0 / obs. 110467037

Eriogonum heermannii, photographed by Shawn O'Donnell — fig. d Shawn O'Donnell, CC BY 4.0 / obs. 102766200

Eriogonum heermannii, photographed by Tim Messick — fig. e Tim Messick, CC BY 4.0 / obs. 98805326

Eriogonum heermannii, photographed by desertnaturalist — fig. h desertnaturalist, CC BY 4.0 / obs. 84952310

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Native range 4 botanical countries

Native distribution of Eriogonum heermannii, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows.

Region	TDWG code	Continent
Arizona	ARI	NORTHERN AMERICA
California	CAL
Nevada	NEV
Utah	UTA

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Flowering 93 in flower of 174 examined

13%

50%

88%

83%

80%

89%

78%

60%

Proportion of examined Eriogonum heermannii in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	2	3	too few examined
Feb	0	12	0%	0% to 24%
Mar	2	28	7%	2% to 23%
Apr	0	10	0%	0% to 28%
May	1	8	13%	2% to 47%
Jun	10	20	50%	30% to 70%
Jul	7	8	88%	53% to 98%
Aug	15	18	83%	61% to 94%
Sep	12	15	80%	55% to 93%
Oct	34	38	89%	76% to 96%
Nov	7	9	78%	45% to 94%
Dec	3	5	60%	23% to 88%

Peak flowering in Oct. Each bar is the share of Eriogonum heermannii observations in which someone actually recorded the reproductive state and found the plant in flower, not the raw number of flowering records. That distinction matters: people observe plants far more in spring than in winter, so a bare count of flowering records partly measures when people go outside. Dividing by the number examined removes that. 93 of 174 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. One month has fewer than 5 examined observations, so no proportion is drawn for it. This is still a global aggregate and not a forecast for your garden: the same species flowers on different dates in different hemispheres. Where a species has fewer than 30 flowering records we do not draw this chart at all. Computed from 10.15468/dl.cgje2x.

Also published as 16 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

Eriogonum apachense Reveal
Eriogonum geniculatum Durand & Hilg.
Eriogonum heermannii subsp. argense (M.E.Jones) Munz
Eriogonum heermannii subsp. floccosum (Munz) Munz
Eriogonum heermannii subsp. heermannii
Eriogonum heermannii subsp. humilius S.Stokes
Eriogonum heermannii subsp. occidentale (S.Stokes) S.Stokes
Eriogonum heermannii subsp. sulcatum (S.Watson) S.Stokes
Eriogonum heermannii subsp. typicum S.Stokes
Eriogonum heermannii var. heermannii
Eriogonum heermannii var. subracemosum (S.Stokes) Reveal
Eriogonum howellii S.Stokes
Eriogonum howellii var. argense (M.E.Jones) S.Stokes
Eriogonum howellii var. subracemosum S.Stokes
Eriogonum sulcatum S.Watson
Eriogonum sulcatum var. argense M.E.Jones

Sourcesevery claim on this page

World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.