Taxon Details
Hesperolinon congestum
Marin western flax
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© 2009 Neal Kramer |
© 2007 Toni Corelli |
© 2008 Aaron Schusteff |
Taxon Summary:
Hesperolinon congestum, commonly known as Marin western flax, is a annual herb in the Linaceae that is found only in California. It occurs within Chaparral, and Valley and foothill grassland, growing at elevations from 5 to 370 meters. Hesperolinon congestum is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.|
Scientific Name: Hesperolinon congestum (Gray) Small |
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Common Name: Marin western flax |
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| Family: | Linaceae | |
| Element Code: | PDLIN01060 | |
| USDA Plants Symbol: | HECO12 | |
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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: | FT (1995-02-03) |
| State List: | CT (1992-06-01) |
| Global Rank: | G1 |
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State Rank: |
S1 |
| Other Status: | SB_CalBG/RSABG; SB_UCBG |
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CRPR Changes: |
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| Add Date: | 1974-01-01 |
| Date Edited: | 2022-01-05 |
| Lifeform: annual herb | ||||||||||||||
Blooming Period: Apr-Jul
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Elevation:
5 - 370 meters 15 - 1215 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
Microhabitat:
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Notes: Protected in part at Ring Mtn. Preserve, MRN Co. Threatened by development, non-native plants, and foot traffic. Potentially threatened by hydrological alterations. See Proceedings of the American Academy of Arts and Sciences 6:521 (1865) for original description, and University of California Publications in Botany 32:235-314 (1961) for taxonomic treatment. |
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Threats: |
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Taxonomy: |
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| Threat List Total: | 12 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 21 | 78 % |
| THREAT LIST: | ||
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| Non-native plant impacts | 13 | 48% |
| Foot traffic/trampling | 12 | 44% |
| Road/trail construction/maint. | 11 | 40% |
| Development | 7 | 25% |
| Erosion/runoff | 5 | 18% |
| Recreational use (non-ORV) | 5 | 18% |
| Other | 4 | 14% |
| Grazing | 2 | 7% |
| Biocides | 2 | 7% |
| Dam/Inundation | 2 | 7% |
| Vandalism/dumping/litter | 2 | 7% |
| Disking | 1 | 3% |
| Total Occurrences: | 27 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 4 | 10 | 5 | 1 | 3 | 4 |
| Occurrence Status: | |||||
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| Historical >20 Years | 9 | ||||
| Recent <=20 Years | 18 | ||||
| Presence: | |||||
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| Presumed Extant | 24 | ||||
| Possibly Extirpated | 2 | ||||
| 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), San Francisco (SFO), San Mateo (SMT) |
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Quads: Name (Quad Code) Bolinas (3712286), Novato (3812215), Palo Alto (3712242), Petaluma (3812226), Petaluma River (3812225), San Francisco North (3712274), San Geronimo (3812216), San Mateo (3712253), San Quentin (3712284), San Rafael (3712285), Woodside (3712243) |
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Notes:
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Presumed Extant
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