Taxon Report

Lathyrus rigidus White

rigid pea

Print Report


© 2008 Christopher L. Christie

Taxon Summary

Lathyrus rigidus, commonly known as rigid pea, is a perennial herb in the Fabaceae that is found in California and elsewhere. It occurs within Great Basin scrub, and Pinyon and juniper woodland, growing at elevations from 800 to 1750 meters. Lathyrus rigidus is ranked 2B.2, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Moderately threatened in California.

  Classification
Scientific Name:
 Lathyrus rigidus White
Common Name:
 rigid pea
Family: Fabaceae
Element Code: PDFAB250W0
USDA Plants Symbol: LARI
Synonyms/Other Names:

Ecology and Life History
Lifeform: perennial herb
Blooming Period: Apr-Jul Apr-Jul
Elevation: 800-1750 (2625-5740)
General Habitats: Great Basin scrub, Pinyon and juniper woodland
Microhabitat: Disturbed areas (often)
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 2B.2
Global Rank: G5
State Rank:
 S2
State List: None
Fed List: None
Other Status:
CRPR Changes:
  • changed from 2.2 to 2B.2 on 2013-06-12

Occurrence Data from the CNDDB
Total Occurrences: 10
Element Occurrence Ranks:
   Excellent (A) 1
   Good (B) 4
   Fair (C) 0
   Poor (D) 0
   None (X) 0
   Unknown (U) 5

Location
California Endemic:  False
California Counties and Islands: Name (Code)
Lassen (LAS), Modoc (MOD)
Quads: Name (Quad Code)
Davis Creek (4112063), Eagle Peak (4112032), Fort Bidwell (4112072), Lauer Reservoir (4112064), Payne Peak (4112053), Snake Lake (4112021), Sugar Hill (4112073), Surprise (4112054), West of Willow Ranch (4112084), Willow Ranch (4112083)

Threat List Data from the CNDDB

Threat List Total: 2
EOs with Threat Listed: Total EOs % of EOs
2 20 %
Grazing 1 10%
Other 1 10%

Notes
Threatened by grazing. See Bulletin of the Torrey Botanical Club 21:455 (1894) for original description.
Threats:
Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 5 February 2025].