Taxon Report
Senecio clevelandii Greene var. heterophyllus HooverRed Hills ragwort |
 © 2015 Barry Breckling |
Taxon Summary
Senecio clevelandii var. heterophyllus, commonly known as Red Hills ragwort, is a perennial herb in the Asteraceae that is found only in California. It occurs within Cismontane woodland (seeps, and serpentinite), growing at elevations from 260 to 385 meters. Senecio clevelandii var. heterophyllus is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.Classification
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Scientific Name: |
Senecio clevelandii Greene var. heterophyllus Hoover |
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Common Name: |
Red Hills ragwort |
| Family: | Asteraceae |
| Element Code: | PDAST8H0R2 |
| USDA Plants Symbol: | |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: May-Jul | May-Jul |
| Elevation: | 260-385 (855-1265) |
| General Habitats: | Cismontane woodland |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G4?T2Q |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S; SB_SBBG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 12 |
| Element Occurrence Ranks: | |
| Excellent (A) | 4 |
| Good (B) | 6 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 2 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Tuolumne (TUO) | |
| Quads: Name (Quad Code) | |
| Chinese Camp (3712074), Keystone (3712075), Moccasin (3712073), Sonora (3712084) | |
Threat List Data from the CNDDB
| Threat List Total: | 8 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 9 | 75 % | |
| Other | 7 | 58% |
| Improper burning regime | 6 | 50% |
| Foot traffic/trampling | 6 | 50% |
| Recreational use (non-ORV) | 5 | 41% |
| Altered flood/tidal/hydrologic regime | 4 | 33% |
| Grazing | 3 | 25% |
| ORV activity | 2 | 16% |
| Development | 1 | 8% |
Notes
| Known only from the Red Hills (TUO) and protected at Red Hills ACEC (BLM) |
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Threats: |
| Possibly threatened by grazing, recreational activities and foot traffic. |
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Taxonomy: |
| A synonym of Senecio clevelandii in The Jepson Manual (1993) and Packera clevelandii in the Jepson eFlora (2012). See Leaflets of Western Botany 2:132 (1938) for original description and Phytologia 49(1): 44-50 (1981) for revised nomenclature. |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 24 October 2025].