Taxon Report

Wyethia longicaulis Gray

Humboldt County wyethia

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Taxon Summary

Wyethia longicaulis, commonly known as Humboldt County wyethia, is a perennial herb in the Asteraceae that is found only in California. It occurs within Broadleafed upland forest, Coastal prairie, and Lower montane coniferous forest, growing at elevations from 750 to 1525 meters. Wyethia longicaulis is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Wyethia longicaulis Gray
Common Name:	Humboldt County wyethia
Family:	Asteraceae
Element Code:	PDAST9X0A0
USDA Plants Symbol:	WYLO
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: May-Jul	May-Jul
Elevation:	750-1525 (2460-5005)
General Habitats:	Broadleafed upland forest, Coastal prairie, Lower montane coniferous forest
Microhabitat:	Roadsides (sometimes)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G4
State Rank:	S4
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: True
California Counties and Islands: Name (Code)
Humboldt (HUM), Mendocino (MEN)
Quads: Name (Quad Code)
Board Camp Mtn. (4012366), Grouse Mtn. (4012376), Larabee Valley (4012346), Longvale (3912354), Mad River Buttes (4012367), Willits (3912343)

Threat List Data from the CNDDB


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

Notes



Threatened by road maintenance. Potentially threatened by vehicles, road construction, and logging.
Threats:

Taxonomy:

Selected References

USFS Potential Species of Conservation Concern Profile

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 January 2025].