Taxon Details
Trifolium amoenum
two-fork clover
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Taxon Summary:
Trifolium amoenum, commonly known as two-fork clover, is a annual herb in the Fabaceae that is found only in California. It occurs within Coastal bluff scrub, and Valley and foothill grassland (sometimes serpentinite), growing at elevations from 5 to 415 meters. Trifolium amoenum is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.|
Scientific Name: Trifolium amoenum Greene |
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Common Name: two-fork clover |
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| Family: | Fabaceae | |
| Element Code: | PDFAB40040 | |
| USDA Plants Symbol: | TRAM3 | |
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Synonyms/Other Names: |
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| Name Status: |
JEF, FNA, POWO, IPNI, Tropicos |
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| CA Rare Plant Rank: | 1B.1 |
| Fed List: | FE (1997-10-22) |
| State List: | None |
| Global Rank: | G1 |
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State Rank: |
S1 |
| Other Status: | SB_CalBG/RSABG; SB_UCBG; SB_USDA |
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CRPR Changes: |
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| Add Date: | 1974-01-01 |
| Date Edited: | 2021-05-26 |
| Lifeform: annual herb | ||||||||||||||
Blooming Period: Apr-Jun
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Elevation:
5 - 415 meters 15 - 1360 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
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Microhabitat:
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Notes: Rediscovered in 1993 by P. Conners near Occidental; only one plant found, and subsequent surveys in 1994-1995 unsuccessful. Another occurrence (502C) discovered in 1996. Historical habitat lost to urbanization and agriculture. See Flora Franciscana, p. 27 (1891) by E. Greene for original description, and Fremontia 22(2):3-7 (1994) for account of rediscovery. |
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Threats: |
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Taxonomy: |
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| Threat List Total: | 2 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 2 | 8 % |
| THREAT LIST: | ||
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| Development | 2 | 7% |
| Erosion/runoff | 1 | 3% |
| Total Occurrences: | 26 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 0 | 2 | 0 | 0 | 5 | 19 |
| Occurrence Status: | |||||
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| Historical >20 Years | 25 | ||||
| Recent <=20 Years | 1 | ||||
| Presence: | |||||
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| Presumed Extant | 21 | ||||
| Possibly Extirpated | 4 | ||||
| Presumed Extirpated | 1 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) California (CA) |
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California Counties and Islands: Name (Code) Marin (MRN), Napa (NAP)*, San Mateo (SMT), Solano (SOL)*, Sonoma (SON)(?) |
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Quads: Name (Quad Code) Bolinas (3712286)*, Camp Meeker (3812248)*, Cordelia (3812222), Cotati (3812236)*, Cuttings Wharf (3812223)*, Drakes Bay (3812218)*, Duncans Mills (3812341)(?), Elmira (3812138)*, Fairfield North (3812231), Inverness (3812217)*, Kenwood (3812245)*, Napa (3812233)*, Palo Alto (3712242), Petaluma (3812226)*, San Francisco South (3712264), San Quentin (3712284)*, San Rafael (3712285), Santa Rosa (3812246)*, Sebastopol (3812247)*, Two Rock (3812237), Valley Ford (3812238) |
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Notes:
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Presumed Extant
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