Taxon Report

Thermopsis robusta Howell

robust false lupine

Print Report

©2018 Hayley Ross

Classification


Scientific Name:	Thermopsis robusta Howell
Common Name:	robust false lupine
Family:	Fabaceae
Element Code:	PDFAB3Z0D0
USDA Plants Symbol:	THRO4
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial rhizomatous herb
Blooming Period: May-Jul	May-Jul
Elevation:	150-1500 (490-4920)
General Habitats:	Broadleafed upland forest, North Coast coniferous forest
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	SB_UCSC; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	104
Element Occurrence Ranks:
Excellent (A)	2
Good (B)	18
Fair (C)	36
Poor (D)	11
None (X)	1
Unknown (U)	36

Location


California Endemic: True
California Counties and Islands: Name (Code)
Del Norte (DNT), Humboldt (HUM), Mendocino (MEN), Siskiyou (SIS), Trinity (TRI)
Quads: Name (Quad Code)
Ah Pah Ridge (4112348), Bark Shanty Gulch (4112345), Bear Peak (4112365), Blake Mountain (4012355), Blue Creek Mtn. (4112347), Chimney Rock (4112356), Clear Creek (4112364), Deadman Point (4112384), Dillon Mtn. (4112355), Fish Lake (4112336), Hales Grove (3912377), Happy Camp (4112374), Hopkins Butte (4112325), Huckleberry Mtn. (4112363), Johnsons (4112337), Lincoln Ridge (3912366), Lonesome Ridge (4112346), Lord-ellis Summit (4012387), Maple Creek (4012377), Orleans (4112335), Slater Butte (4112373), Somes Bar (4112344), Ukonom Mtn. (4112354), Weitchpec (4112326)

Threat List Data from the CNDDB


Threat List Total:	11
EOs with Threat Listed:	Total EOs	% of EOs
	76	73 %
Road/trail construction/maint.	55	52%
Logging	44	42%
Other	17	16%
Non-native plant impacts	9	8%
Biocides	5	4%
Grazing	2	1%
Improper burning regime	2	1%
ORV activity	2	1%
Mining	1	0%
Insufficient population/stand size	1	0%
Wood cutting or brush clearing	1	0%

Notes



Many collections historical. Threatened by road maintenance, logging and associated road usage. Not in TJM (1993); a synonym of T. macrophylla var. macrophylla in A California Flora (1959) by P. Munz. See Erythea 1:109 (1893) for original description.
Threats:

Taxonomy:

Selected References

USFS Potential Species of Conservation Concern Profile

Citation California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 25 December 2024].