Species Details

Horkelia hendersonii

Henderson's horkelia

View Report Copy Link Calflora eFlora CCH CalPhotos iNaturalist

Species Description:

Horkelia hendersonii, commonly known as Henderson's horkelia, is a perennial herb in the Rosaceae that is found in California and elsewhere. It occurs within Upper montane coniferous forest, growing at elevations from 2000 to 2300 meters. Horkelia hendersonii is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification

Scientific Name: Horkelia hendersonii Howell
Common Name: Henderson's horkelia
Family:	Rosaceae
Element Code:	PDROS0W090
USDA Plants Symbol:	HOHE2
Synonyms/Other Names:
Name Status:	JEP, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.1
Fed List:	None
State List:	None
Global Rank:	G1
State Rank:	S1
Other Status:	BLM_S; SB_BerrySB; SB_CalBG/RSABG; USFS_S
CRPR Changes:
Add Date:	1988-01-01
Date Edited:	2024-11-05

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Jun-Aug

Elevation:
2000 - 2300 meters
6560 - 7545 feet

General Habitats:

Upper montane coniferous forest (granitic)

Microhabitat Details:

Microhabitat:

Notes

Notes: Known in CA from only one occurrence. Endangered in OR.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	1
	Total EOs	% of EOs
EOs with Threat Listed:	1	100 %
Road/trail construction/maint.	1	100%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					1
A	B	C	D	X	U
0	1	0	0	0	0

Occurrence Status:
Historical >20 Years	1
Recent <=20 Years	0

Presence:
Presumed Extant	1
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA), Oregon (OR)

California Counties and Islands: Name (Code)
Siskiyou (SIS)

Quads: Name (Quad Code)
Condrey Mtn. (4112288)

Notes:

Definitions of codes following a county and/or quad:
*		Presumed extirpated
(?)		Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Regional Map

Map

Presumed Extant

Click on quad for name. Hold Shift Key to use mouse scroll wheel

CNPS Rare Plant Inventory