Taxon Report

Horkelia tularensis (J.T. Howell) Munz

Kern Plateau horkelia

Print Report

Taxon Summary

Horkelia tularensis, commonly known as Kern Plateau horkelia, is a perennial herb in the Rosaceae that is found only in California. It occurs within Upper montane coniferous forest, growing at elevations from 2255 to 2875 meters. Horkelia tularensis is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification


Scientific Name:	Horkelia tularensis (J.T. Howell) Munz
Common Name:	Kern Plateau horkelia
Family:	Rosaceae
Element Code:	PDROS0W0H0
USDA Plants Symbol:	HOTU
Synonyms/Other Names:	Potentilla tularensis

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: (May)Jun-Aug	(May)Jun-Aug
Elevation:	2255-2875 (7400-9435)
General Habitats:	Upper montane coniferous forest
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.3
Global Rank:	G2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	5
Element Occurrence Ranks:
Excellent (A)	1
Good (B)	3
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	1

Location


California Endemic: True
California Counties and Islands: Name (Code)
Tulare (TUL)
Quads: Name (Quad Code)
Bonita Meadows (3611813), Crag Peak (3611812)

Threat List Data from the CNDDB


Threat List Total:	4
EOs with Threat Listed:	Total EOs	% of EOs
	2	40 %
Grazing	2	40%
Logging	1	20%
ORV activity	1	20%
Foot traffic/trampling	1	20%

Notes



Potentially threatened by mining and recreational activities. Protected in part in BA (USFS) which includes the type locality. See Leaflets of Western Botany 10(13):254-255 (1966) 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 21 November 2025].