Taxon Report

Horkelia hispidula Rydb.

White Mountains horkelia

Print Report

Taxon Summary

Horkelia hispidula, commonly known as White Mountains horkelia, is a perennial herb in the Rosaceae that is found in California and elsewhere. It occurs within Alpine dwarf scrub, Great Basin scrub, and Subalpine coniferous forest, growing at elevations from 3000 to 3400 meters. Horkelia hispidula is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification


Scientific Name:	Horkelia hispidula Rydb.
Common Name:	White Mountains horkelia
Family:	Rosaceae
Element Code:	PDROS0W0A0
USDA Plants Symbol:	HOHI
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jun-Aug	Jun-Aug
Elevation:	3000-3400 (9845-11155)
General Habitats:	Alpine dwarf scrub, Great Basin scrub, Subalpine coniferous forest
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.3
Global Rank:	G3
State Rank:	S3
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	14
Element Occurrence Ranks:
Excellent (A)	3
Good (B)	2
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	9

Location


California Endemic: False
California Counties and Islands: Name (Code)
Inyo (INY), Mono (MNO)
Quads: Name (Quad Code)
Blanco Mtn. (3711842), Juniper Mtn. (3711862), Mt. Barcroft (3711852), Station Peak (3711851)

Threat List Data from the CNDDB


Threat List Total:	4
EOs with Threat Listed:	Total EOs	% of EOs
	5	36 %
Foot traffic/trampling	2	14%
Grazing	2	14%
Other	1	7%
Road/trail construction/maint.	1	7%

Notes



Possibly threatened by vehicles. See North American Flora 22:278 (1908) for original description.
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 8 February 2025].