Taxon Report

Leptosiphon nuttallii (Gray) Porter & Johnson ssp. howellii (Nels. & Patterson) Porter & Johnson

Mt. Tedoc leptosiphon

Print Report

Taxon Summary

Leptosiphon nuttallii ssp. howellii, commonly known as Mt. Tedoc leptosiphon, is a perennial herb in the Polemoniaceae that is found only in California. It occurs within Lower montane coniferous forest, growing at elevations from 1220 to 2800 meters. Leptosiphon nuttallii ssp. howellii is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification


Scientific Name:	Leptosiphon nuttallii (Gray) Porter & Johnson ssp. howellii (Nels. & Patterson) Porter & Johnson
Common Name:	Mt. Tedoc leptosiphon
Family:	Polemoniaceae
Element Code:	PDPLM090V4
USDA Plants Symbol:	LENUH
Synonyms/Other Names:	Linanthus nuttallii (Gray) Mlkn. ssp. howellii Nels. & Patterson

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: May-Aug	May-Aug
Elevation:	1220-2800 (4005-9185)
General Habitats:	Lower montane coniferous forest
Microhabitat:	Serpentine (sometimes)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.3
Global Rank:	G5T2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	BLM_S; SB_BerrySB; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB


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

Location


California Endemic: True
California Counties and Islands: Name (Code)
Tehama (TEH)
Quads: Name (Quad Code)
North Yolla Bolly (4012228), Platina (4012238)

Threat List Data from the CNDDB


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

Notes



Known from fewer than 10 occurrences in the Mt. Tedoc region of the Klamath Mtns.
Threats:

Taxonomy:
A synonym of Linanthus nuttallii ssp. howellii in The Jepson Manual. See Madroño 32(2):102 (1985) for original description, and Aliso 19(1):55-91 (2000) for revised nomenclature.

Selected References

Leptosiphon nuttallii ssp. howellii account 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 19 November 2025].