Taxon Report

Horkelia sericata S. Watson

silky horkelia

Print Report

Taxon Summary

Horkelia sericata, commonly known as silky horkelia, is a perennial herb in the Rosaceae that is found in California and elsewhere. It occurs within Chaparral, and Lower montane coniferous forest, growing at elevations from 180 to 1200 meters. Horkelia sericata is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Horkelia sericata S. Watson
Common Name:	silky horkelia
Family:	Rosaceae
Element Code:	PDROS0W0N0
USDA Plants Symbol:	HOSE
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jun-Aug	Jun-Aug
Elevation:	180-1200 (590-3935)
General Habitats:	Chaparral, Lower montane coniferous forest
Microhabitat:	Clay, Serpentine
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G3G4
State Rank:	S3
State List:	None
Fed List:	None
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB


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

Location


California Endemic: False
California Counties and Islands: Name (Code)
Del Norte (DNT), Siskiyou (SIS), Trinity (TRI)
Quads: Name (Quad Code)
Bear Peak (4112365), Broken Rib Mtn. (4112386), Childs Hill (4112461), Crescent City (4112472), Gasquet (4112378), High Divide (4112481), High Plateau Mtn. (4112388), Hiouchi (4112471), Hurdygurdy Butte (4112377), Hyampom (4012354), Klamath Glen (4112358), Shelly Creek Ridge (4112387), Ship Mountain (4112367), Summit Valley (4112357)

Threat List Data from the CNDDB


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

Notes




Threats:

Taxonomy:
Previously included H. howellii.

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 15 February 2025].