Taxon Report
Eriophyllum latilobum Rydb.San Mateo woolly sunflower |
 Neal Kramer |
Taxon Summary
Eriophyllum latilobum, commonly known as San Mateo woolly sunflower, is a perennial herb in the Asteraceae that is found only in California. It occurs within Cismontane woodland (often roadsides), Coastal scrub, and Lower montane coniferous forest, growing at elevations from 45 to 330 meters. Eriophyllum latilobum is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.Classification
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Scientific Name: |
Eriophyllum latilobum Rydb. |
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Common Name: |
San Mateo woolly sunflower |
| Family: | Asteraceae |
| Element Code: | PDAST3N060 |
| USDA Plants Symbol: | ERLA8 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: May-Jun | May-Jun |
| Elevation: | 45-330 (150-1085) |
| General Habitats: | Cismontane woodland, Coastal scrub, Lower montane coniferous forest |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G1 |
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State Rank: |
S1 |
| State List: | CE |
| Fed List: | FE |
| Other Status: | SB_CalBG/RSABG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 8 |
| Element Occurrence Ranks: | |
| Excellent (A) | 1 |
| Good (B) | 2 |
| Fair (C) | 1 |
| Poor (D) | 0 |
| None (X) | 1 |
| Unknown (U) | 3 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| San Mateo (SMT) | |
| Quads: Name (Quad Code) | |
| La Honda (3712233)*, Mindego Hill (3712232), Montara Mountain (3712254), San Mateo (3712253) | |
Threat List Data from the CNDDB
| Threat List Total: | 9 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 6 | 75 % | |
| Road/trail construction/maint. | 3 | 37% |
| Other | 2 | 25% |
| Altered flood/tidal/hydrologic regime | 2 | 25% |
| Erosion/runoff | 2 | 25% |
| Mining | 1 | 12% |
| Non-native plant impacts | 1 | 12% |
| Biocides | 1 | 12% |
| Development | 1 | 12% |
| Wood cutting or brush clearing | 1 | 12% |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 19 November 2025].