Taxon Report
Lathyrus japonicus Willd.seaside pea |
 ©2021 Scot Loring |
Taxon Summary
Lathyrus japonicus, commonly known as seaside pea, is a perennial rhizomatous herb in the Fabaceae that is found in California and elsewhere. It occurs within Coastal dunes, growing at elevations from 1 to 30 meters. Lathyrus japonicus is ranked 2B.1, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Seriously threatened in California.Classification
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Scientific Name: |
Lathyrus japonicus Willd. |
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Common Name: |
seaside pea |
| Family: | Fabaceae |
| Element Code: | PDFAB250C0 |
| USDA Plants Symbol: | LAJA |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial rhizomatous herb |
| Blooming Period: May-Aug | May-Aug |
| Elevation: | 1-30 (5-100) |
| General Habitats: | Coastal dunes |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 2B.1 |
| Global Rank: | G5 |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | IUCN_LC |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 24 |
| Element Occurrence Ranks: | |
| Excellent (A) | 1 |
| Good (B) | 5 |
| Fair (C) | 4 |
| Poor (D) | 3 |
| None (X) | 0 |
| Unknown (U) | 11 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Del Norte (DNT), Humboldt (HUM) | |
| Quads: Name (Quad Code) | |
| Arcata North (4012481), Arcata South (4012471), Crannell (4112411), Crescent City (4112472), Eureka (4012472), Fern Canyon (4112441), Orick (4112431), Rodgers Peak (4112421), Sister Rocks (4112462), Smith River (4112482) | |
Threat List Data from the CNDDB
| Threat List Total: | 9 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 13 | 54 % | |
| Foot traffic/trampling | 8 | 33% |
| Non-native plant impacts | 6 | 25% |
| ORV activity | 5 | 20% |
| Other | 5 | 20% |
| Recreational use (non-ORV) | 5 | 20% |
| Erosion/runoff | 5 | 20% |
| Road/trail construction/maint. | 2 | 8% |
| Vandalism/dumping/litter | 1 | 4% |
| Development | 1 | 4% |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 10 November 2025].