Taxon Report

Lathyrus sulphureus Gray var. argillaceus Jeps.

dubious pea

Print Report

Taxon Summary

Lathyrus sulphureus var. argillaceus, commonly known as dubious pea, is a perennial herb in the Fabaceae that is found only in California. It occurs within Cismontane woodland, Lower montane coniferous forest, and Upper montane coniferous forest, growing at elevations from 150 to 930 meters. Lathyrus sulphureus var. argillaceus is ranked 3, Plants About Which We Need More Information, A Review List.

Classification


Scientific Name:	Lathyrus sulphureus Gray var. argillaceus Jeps.
Common Name:	dubious pea
Family:	Fabaceae
Element Code:	PDFAB25101
USDA Plants Symbol:	LASUA
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Apr-May	Apr-May
Elevation:	150-930 (490-3050)
General Habitats:	Cismontane woodland, Lower montane coniferous forest, Upper montane coniferous forest
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	3
Global Rank:	G5T1T2Q
State Rank:	S1S2
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	changed from 3 to 3 on 2013-02-01

Occurrence Data from the CNDDB


Total Occurrences:	7
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	1
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	6

Location


California Endemic: True
California Counties and Islands: Name (Code)
Amador (AMA), Calaveras (CAL), El Dorado (ELD), Nevada (NEV)?, Placer (PLA), Shasta (SHA), Tehama (TEH)
Quads: Name (Quad Code)
Auburn (3812181), Enterprise (4012253), Grass Valley (3912121), Lake Combie (3912111)?, North Bloomfield (3912038), Rail Road Flat (3812035), Redding (4012254), Rosewood (4012235), Rough And Ready (3912122)?, West Point (3812045)

Threat List Data from the CNDDB


Threat List Total:	3
EOs with Threat Listed:	Total EOs	% of EOs
	2	29 %
Foot traffic/trampling	2	28%
Grazing	1	14%
Road/trail construction/maint.	1	14%

Notes



Move to List 1B? Location, rarity, and endangerment information needed. Taxonomy poorly understood; needs further study. Possibly threatened by development and road maintenance. A synonym of L. sulphureus in TJM (1993) and TJM 2. See Flora of California 2(1):393 (1936) by W.L. Jepson for original description.
Threats:

Taxonomy:

Selected References

CRPR List Deletion on 2013-02-01

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].