Taxon Report

Tauschia howellii (Coult. & Rose) Macbr.

Howell's tauschia

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Taxon Summary

Tauschia howellii, commonly known as Howell's tauschia, is a perennial herb in the Apiaceae that is found in California and elsewhere. It occurs within Subalpine coniferous forest, and Upper montane coniferous forest, growing at elevations from 1705 to 2500 meters. Tauschia howellii is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification


Scientific Name:	Tauschia howellii (Coult. & Rose) Macbr.
Common Name:	Howell's tauschia
Family:	Apiaceae
Element Code:	PDAPI27050
USDA Plants Symbol:	TAHO2
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jun-Aug	Jun-Aug
Elevation:	1705-2500 (5595-8205)
General Habitats:	Subalpine coniferous forest, Upper montane coniferous forest
Microhabitat:	Granitic, Gravelly
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.3
Global Rank:	G2G3
State Rank:	S2S3
State List:	None
Fed List:	None
Other Status:	SB_SBBG; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	6
Element Occurrence Ranks:
Excellent (A)	2
Good (B)	3
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	1

Location


California Endemic: False
California Counties and Islands: Name (Code)
Fresno (FRE), Sierra (SIE), Siskiyou (SIS)
Quads: Name (Quad Code)
Bear Peak (4112365), English Peak (4112342), Forks of Salmon (4112333), Patterson Mtn. (3611981), Sierra City (3912056), Ukonom Lake (4112353)

Threat List Data from the CNDDB


Threat List Total:	5
EOs with Threat Listed:	Total EOs	% of EOs
	4	67 %
Foot traffic/trampling	3	50%
Logging	1	16%
ORV activity	1	16%
Other	1	16%
Recreational use (non-ORV)	1	16%

Notes



Possibly threatened by logging and vehicles. Candidate for state listing in OR. See Contributions from the Gray Herbarium 56:32 (1918) for revised nomenclature.
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 26 February 2025].