Taxon Report

Lathyrus jepsonii Greene var. jepsonii

Delta tule pea

Print Report


© 2003 Mark Fogiel

Taxon Summary

Lathyrus jepsonii var. jepsonii, commonly known as Delta tule pea, is a perennial herb in the Fabaceae that is found only in California. It occurs within Marshes and swamps (brackish, and freshwater), growing at elevations from 0 to 5 meters. Lathyrus jepsonii var. jepsonii is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

  Classification
Scientific Name:
 Lathyrus jepsonii Greene var. jepsonii
Common Name:
 Delta tule pea
Family: Fabaceae
Element Code: PDFAB250D2
USDA Plants Symbol:
Synonyms/Other Names:

Ecology and Life History
Lifeform: perennial herb
Blooming Period: May-Jul(Aug-Sep) May-Jul(Aug-Sep)
Elevation: 0-5 (0-15)
General Habitats: Marshes and swamps
Microhabitat:
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 1B.2
Global Rank: G5T2
State Rank:
 S2
State List: None
Fed List: None
Other Status: SB_BerrySB; SB_CalBG/RSABG
CRPR Changes:

Occurrence Data from the CNDDB
Total Occurrences: 133
Element Occurrence Ranks:
   Excellent (A) 5
   Good (B) 20
   Fair (C) 21
   Poor (D) 11
   None (X) 2
   Unknown (U) 74

Location
California Endemic:  True
California Counties and Islands: Name (Code)
Contra Costa (CCA), Napa (NAP), Sacramento (SAC), San Joaquin (SJQ), Solano (SOL), Sonoma (SON), Yolo (YOL)
Quads: Name (Quad Code)
Antioch North (3812117), Benicia (3812212), Bouldin Island (3812115), Bruceville (3812134), Courtland (3812135), Cuttings Wharf (3812223), Denverton (3812128), Dozier (3812137), Fairfield South (3812221), Holt (3712184), Honker Bay (3812118), Isleton (3812125), Jersey Island (3812116), Liberty Island (3812136), Mare Island (3812213), Napa (3812233), Rio Vista (3812126), Stockton West (3712183), Terminous (3812114), Thornton (3812124), Vine Hill (3812211), Woodward Island (3712185)

Threat List Data from the CNDDB

Threat List Total: 12
EOs with Threat Listed: Total EOs % of EOs
41 31 %
Waterway bank protection/maintenance 17 12%
Non-native plant impacts 12 9%
Other 7 5%
Road/trail construction/maint. 6 4%
Recreational use (non-ORV) 4 3%
Foot traffic/trampling 4 3%
Grazing 4 3%
Development 4 3%
Erosion/runoff 2 1%
Biocides 2 1%
Agriculture 1 0%
Pollution 1 0%

Notes
Most populations small. Threatened by agriculture, water diversions, and erosion. See Pittonia 2:158 (1890) 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 23 February 2025].