Taxon Report

Eriogonum umbellatum Torr. var. juniporinum Rev.

juniper sulphur-flowered buckwheat

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Taxon Summary

Eriogonum umbellatum var. juniporinum, commonly known as juniper sulphur-flowered buckwheat, is a perennial herb in the Polygonaceae that is found in California and elsewhere. It occurs within Mojavean desert scrub, and Pinyon and juniper woodland, growing at elevations from 1300 to 2500 meters. Eriogonum umbellatum var. juniporinum is ranked 2B.3, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Not very threatened in California.

Classification


Scientific Name:	Eriogonum umbellatum Torr. var. juniporinum Rev.
Common Name:	juniper sulphur-flowered buckwheat
Family:	Polygonaceae
Element Code:	PDPGN086U6
USDA Plants Symbol:	ERUMJ
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jul-Oct	Jul-Oct
Elevation:	1300-2500 (4265-8205)
General Habitats:	Mojavean desert scrub, Pinyon and juniper woodland
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.3
Global Rank:	G5T4
State Rank:	S3
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG
CRPR Changes:	changed from 2.3 to 2B.3 on 2013-06-12

Occurrence Data from the CNDDB


Total Occurrences:	21
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	21

Location


California Endemic: False
California Counties and Islands: Name (Code)
San Bernardino (SBD)
Quads: Name (Quad Code)
Bighorn Basin (3411576), Clark Mtn. (3511555), Fountain Peak (3411585), Horse Thief Springs (3511578), Ivanpah (3511533), Kingston Peak (3511568), Mid Hills (3511524), Pachalka Spring (3511556)

Threat List Data from the CNDDB


Threat List Total:	0
EOs with Threat Listed:	Total EOs	% of EOs
	0	%

Notes



Similar to var. subaridum. See Great Basin Naturalist 45:279 (1985) for original description, and Phytologia 66(4):341-347 (1989) for taxonomic treatment.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 3 July 2025].