Taxon Report
Acmispon prostratus (Torr. & A. Gray) BrouilletNuttall's acmispon |
 © 2014 Andrew Borcher |
Taxon Summary
Acmispon prostratus, commonly known as Nuttall's acmispon, is a annual herb in the Fabaceae that is found in California and elsewhere. It occurs within Coastal dunes, and Coastal scrub (sandy), growing at elevations from 0 to 10 meters. Acmispon prostratus is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.Classification
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Scientific Name: |
Acmispon prostratus (Torr. & A. Gray) Brouillet |
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Common Name: |
Nuttall's acmispon |
| Family: | Fabaceae |
| Element Code: | PDFAB2A0V0 |
| USDA Plants Symbol: | |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: Mar-Jun(Jul) | Mar-Jun(Jul) |
| Elevation: | 0-10 (0-35) |
| General Habitats: | Coastal dunes, Coastal scrub |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G1G2 |
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State Rank: |
S1 |
| State List: | None |
| Fed List: | None |
| Other Status: | IUCN_EN; SB_CalBG/RSABG; SB_CRES; SB_USDA |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 38 |
| Element Occurrence Ranks: | |
| Excellent (A) | 3 |
| Good (B) | 3 |
| Fair (C) | 9 |
| Poor (D) | 9 |
| None (X) | 5 |
| Unknown (U) | 9 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| San Diego (SDG) | |
| Quads: Name (Quad Code) | |
| Del Mar (3211782), Encinitas (3311713), Imperial Beach (3211751), La Jolla (3211772), National City (3211761), Oceanside (3311724), Point Loma (3211762), San Luis Rey (3311723) | |
Threat List Data from the CNDDB
| Threat List Total: | 13 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 31 | 82 % | |
| Non-native plant impacts | 24 | 63% |
| Foot traffic/trampling | 16 | 42% |
| Development | 14 | 36% |
| Other | 14 | 36% |
| Recreational use (non-ORV) | 7 | 18% |
| Erosion/runoff | 7 | 18% |
| Altered flood/tidal/hydrologic regime | 6 | 15% |
| ORV activity | 5 | 13% |
| Road/trail construction/maint. | 5 | 13% |
| Vandalism/dumping/litter | 5 | 13% |
| Wood cutting or brush clearing | 5 | 13% |
| Biocides | 3 | 7% |
| Military operations | 1 | 2% |
Selected References
| A flora of North America :containing abridged descriptions of all the known indigenous and naturalized plants growing north of Mexico, arranged according to the natural system 1(2): 325. (1838) |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 14 November 2025].