Taxon Details
Horkelia tenuiloba
thin-lobed horkelia
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© 1994 Doreen L. Smith |
© 2002 Doreen L. Smith |
© 2010 Vernon Smith |
Taxon Summary:
Horkelia tenuiloba, commonly known as thin-lobed horkelia, is a perennial herb in the Rosaceae that is found only in California. It occurs within Broadleafed upland forest, Chaparral, and Valley and foothill grassland, growing at elevations from 50 to 500 meters. Horkelia tenuiloba is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.|
Scientific Name: Horkelia tenuiloba (Torr.) Gray |
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Common Name: thin-lobed horkelia |
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| Family: | Rosaceae | |
| Element Code: | PDROS0W0E0 | |
| USDA Plants Symbol: | HOTE2 | |
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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.2 |
| Fed List: | None |
| State List: | None |
| Global Rank: | G2 |
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State Rank: |
S2 |
| Other Status: | BLM_S; SB_CalBG/RSABG |
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CRPR Changes: |
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| Add Date: | 1988-01-01 |
| Date Edited: | 2024-11-05 |
| Lifeform: perennial herb | ||||||||||||||
Blooming Period: May-Jul(Aug)
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Elevation:
50 - 500 meters 165 - 1640 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
Microhabitat:
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Notes: Historical occurrences need field surveys. Threatened by development. Possibly threatened by foot traffic, trail maintenance, logging, and non-native plants. See Report of the Pacific Railroad Expedition 4(5):84 (1857) for original description, and Systematic Botany 18(1):137-144 (1993) for taxonomic treatment. |
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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: | 12 | 44 % |
| THREAT LIST: | ||
|---|---|---|
| Road/trail construction/maint. | 5 | 18% |
| Agriculture | 4 | 14% |
| Development | 4 | 14% |
| Foot traffic/trampling | 3 | 11% |
| Grazing | 1 | 3% |
| Non-native plant impacts | 1 | 3% |
| Recreational use (non-ORV) | 1 | 3% |
| Disking | 1 | 3% |
| Biocides | 1 | 3% |
| Total Occurrences: | 27 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 3 | 4 | 6 | 0 | 0 | 14 |
| Occurrence Status: | |||||
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| Historical >20 Years | 24 | ||||
| Recent <=20 Years | 3 | ||||
| Presence: | |||||
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| Presumed Extant | 27 | ||||
| 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) Marin (MRN), Mendocino (MEN), Sonoma (SON) |
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Quads: Name (Quad Code) Annapolis (3812363), Bolinas (3712286), Camp Meeker (3812248), Dos Rios (3912363), Duncans Mills (3812341), Geyserville (3812268), Gualala (3812375), San Rafael (3712285), Sebastopol (3812247), Sonoma (3812234), Willis Ridge (3912353) |
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Notes:
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Presumed Extant
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