Taxon Report

Pedicularis howellii Gray

Howell's lousewort

Print Report

Taxon Summary

Pedicularis howellii, commonly known as Howell's lousewort, is a perennial herb in the Orobanchaceae that is found in California and elsewhere. It occurs within Upper montane coniferous forest, growing at elevations from 1500 to 1900 meters. Pedicularis howellii is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Pedicularis howellii Gray
Common Name:	Howell's lousewort
Family:	Orobanchaceae
Element Code:	PDSCR1K0J0
USDA Plants Symbol:	PEHO
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jun-Aug	Jun-Aug
Elevation:	1500-1900 (4920-6235)
General Habitats:	Upper montane coniferous forest
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G4
State Rank:	S3
State List:	None
Fed List:	None
Other Status:	USFS_S
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)
Quads: Name (Quad Code)
Bear Peak (4112365), Deadman Point (4112384), Dutch Creek (4112381), Figurehead Mtn. (4112383), Kangaroo Mtn. (4112382), Polar Bear Mtn. (4112385), Prescott Mtn. (4112366), Preston Peak (4112375)

Threat List Data from the CNDDB


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

Notes




Threats:
Threatened by grazing. Endangered in OR.
Taxonomy:

Selected References

Proceedings of the American Academy of Arts and Sciences 20:307 (1885)

Pedicularis howellii profile for potential Species of Conservation Concern evaluation (2022)

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 1 November 2025].