Taxon Details
Trifolium trichocalyx
Monterey clover
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Taxon Summary:
Trifolium trichocalyx, commonly known as Monterey clover, is a annual herb in the Fabaceae that is found only in California. It occurs within Closed-cone coniferous forest (burned areas, openings, and sandy), growing at elevations from 30 to 305 meters. Trifolium trichocalyx is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.|
Scientific Name: Trifolium trichocalyx Heller |
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Common Name: Monterey clover |
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| Family: | Fabaceae | |
| Element Code: | PDFAB402J0 | |
| USDA Plants Symbol: | TRTR | |
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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 (1998-08-12) |
| State List: | CE (1979-11-01) |
| Global Rank: | G1 |
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State Rank: |
S1 |
| Other Status: | SB_UCBG; SB_USDA |
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CRPR Changes: |
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| Add Date: | 1974-01-01 |
| Date Edited: | 2022-12-06 |
| Lifeform: annual herb | ||||||||||||||
Blooming Period: Apr-Jun
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Elevation:
30 - 305 meters 100 - 1000 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
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Microhabitat:
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Notes: Discovered in Big River Forest (TCF), MEN Co. by K. Heise and G. Hulse-Stephens in 2011. Previously known from only two occurrences from the central portion of the Monterey Peninsula; where fewer than 1000 plants seen in 1987, none in 1992, and only 22 in 1995. Seriously threatened by urbanization and altered fire regimes. Appears to be a fire follower. Possibly of hybrid origin. See Muhlenbergia 1:55 (1904) for original description and Madroño 59(3):167 (2012) for discovery of MEN Co. occurrence. |
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Threats: |
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Taxonomy: |
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| Threat List Total: | 9 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 5 | 83 % |
| THREAT LIST: | ||
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| Non-native plant impacts | 4 | 66% |
| Other | 4 | 66% |
| Road/trail construction/maint. | 3 | 50% |
| Recreational use (non-ORV) | 2 | 33% |
| Logging | 2 | 33% |
| Mining | 1 | 16% |
| Development | 1 | 16% |
| Improper burning regime | 1 | 16% |
| Wood cutting or brush clearing | 1 | 16% |
| Total Occurrences: | 6 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 0 | 3 | 1 | 2 | 0 | 0 |
| Occurrence Status: | |||||
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| Historical >20 Years | 1 | ||||
| Recent <=20 Years | 5 | ||||
| Presence: | |||||
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| Presumed Extant | 6 | ||||
| Possibly Extirpated | 0 | ||||
| Presumed Extirpated | 0 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) California (CA) |
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California Counties and Islands: Name (Code) Mendocino (MEN), Monterey (MNT) |
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Quads: Name (Quad Code) Eureka Hill (3812385), Mathison Peak (3912336), Monterey (3612158), Point Arena (3812386) |
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Notes:
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Presumed Extant
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