Taxon Report
Amorpha californica Nutt. var. napensis Jeps.Napa false indigo |
 © 2016 John Doyen |
Taxon Summary
Amorpha californica var. napensis, commonly known as Napa false indigo, is a perennial deciduous shrub in the Fabaceae that is found only in California. It occurs within Broadleafed upland forest (openings), Chaparral, and Cismontane woodland, growing at elevations from 50 to 2000 meters. Amorpha californica var. napensis is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.Classification
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Scientific Name: |
Amorpha californica Nutt. var. napensis Jeps. |
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Common Name: |
Napa false indigo |
| Family: | Fabaceae |
| Element Code: | PDFAB08012 |
| USDA Plants Symbol: | AMCAN |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial deciduous shrub |
| Blooming Period: Apr-Jul | Apr-Jul |
| Elevation: | 50-2000 (165-6560) |
| General Habitats: | Broadleafed upland forest, Chaparral, Cismontane woodland |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G4T2 |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | SB_CalBG/RSABG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 126 |
| Element Occurrence Ranks: | |
| Excellent (A) | 13 |
| Good (B) | 36 |
| Fair (C) | 22 |
| Poor (D) | 4 |
| None (X) | 1 |
| Unknown (U) | 50 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Lake (LAK), Marin (MRN), Napa (NAP), Sonoma (SON) | |
| Quads: Name (Quad Code) | |
| Aetna Springs (3812264), Bodega Head (3812331), Bolinas (3712286), Calistoga (3812255), Camp Meeker (3812248), Cazadero (3812351), Cotati (3812236), Detert Reservoir (3812265), Duncans Mills (3812341), Fort Ross (3812352), Glen Ellen (3812235), Guerneville (3812258), Healdsburg (3812257), Kenwood (3812245), Mark West Springs (3812256), Novato (3812215), Petaluma (3812226), Petaluma River (3812225), Rutherford (3812244), San Geronimo (3812216), San Quentin (3712284), San Rafael (3712285), Santa Rosa (3812246), Sonoma (3812234), St. Helena (3812254) | |
Threat List Data from the CNDDB
| Threat List Total: | 17 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 69 | 55 % | |
| Road/trail construction/maint. | 28 | 22% |
| Non-native plant impacts | 26 | 20% |
| Improper burning regime | 19 | 15% |
| Other | 18 | 14% |
| Erosion/runoff | 13 | 10% |
| Insufficient population/stand size | 10 | 7% |
| Foot traffic/trampling | 9 | 7% |
| Development | 9 | 7% |
| Agriculture | 7 | 5% |
| Logging | 6 | 4% |
| Wood cutting or brush clearing | 6 | 4% |
| Recreational use (non-ORV) | 2 | 1% |
| Altered flood/tidal/hydrologic regime | 1 | 0% |
| Biocides | 1 | 0% |
| Disease | 1 | 0% |
| Grazing | 1 | 0% |
| Feral pigs | 1 | 0% |
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 May 2025].