Taxon Report
Senecio aphanactis Greenechaparral ragwort |
 Neal Kramer |
Taxon Summary
Senecio aphanactis, commonly known as chaparral ragwort, is a annual herb in the Asteraceae that is found in California and elsewhere. It occurs within Chaparral, Cismontane woodland, and Coastal scrub, growing at elevations from 15 to 800 meters. Senecio aphanactis 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 aphanactis Greene |
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Common Name: |
chaparral ragwort |
| Family: | Asteraceae |
| Element Code: | PDAST8H060 |
| USDA Plants Symbol: | SEAP2 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: Jan-Apr(May) | Jan-Apr(May) |
| Elevation: | 15-800 (50-2625) |
| General Habitats: | Chaparral, Cismontane woodland, Coastal scrub |
| Microhabitat: | Alkaline (sometimes) |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G3 |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 98 |
| Element Occurrence Ranks: | |
| Excellent (A) | 12 |
| Good (B) | 6 |
| Fair (C) | 2 |
| Poor (D) | 0 |
| None (X) | 5 |
| Unknown (U) | 73 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Alameda (ALA), Contra Costa (CCA), Fresno (FRE), Los Angeles (LAX), Merced (MER), Monterey (MNT), Orange (ORA), Riverside (RIV), San Benito (SBT), San Bernardino (SBD), San Diego (SDG), San Francisco (SFO), San Luis Obispo (SLO), San Mateo (SMT), Santa Barbara (SBA), Santa Clara (SCL), Santa Cruz (SCR), Solano (SOL), Tulare (TUL), Ventura (VEN) | |
| Quads: Name (Quad Code) | |
| Antioch South (3712187), Arroyo Grande NE (3512025), Benicia (3812212), Bickmore Canyon (3612152), Burnett Peak (3512172), Byron Hot Springs (3712176), Camarillo (3411921), Camatta Ranch (3512043), Cambria (3512151), Cerro Colorado (3612068), Chounet Ranch (3612066), Ciervo Mtn. (3612045), Clayton (3712188), Cypress Mountain (3512058), Dana Point (3311746), Davenport (3712212), Del Mar (3211782), El Toro (3311766), Felton (3712211), Fontana (3411714), Glendora (3411727), Imperial Beach (3211751), Jacumba (3211662), Jamul Mountains (3211668), Jolon (3512182), Kreyenhagen Hills (3612013), La Jolla (3211772), La Mesa (3211771), Laguna Seca Ranch (3612077), Las Pulgas Canyon (3311734), Lillis Ranch (3612044), Lompoc (3412064), Lompoc Hills (3412054), Lopez Mtn. (3512035), Mare Island (3812213), Mercey Hot Springs (3612067), Midway (3712165), Mindego Hill (3712232), Monocline Ridge (3612055), Morro Bay North (3512047), Morro Bay South (3512037), National City (3211761), Newark (3712251), Newbury Park (3411828), Newhall (3411845), North Chalone Peak (3612142), Oceanside (3311724), Ortigalita Peak NW (3612088), Otay Mesa (3211658), Panoche (3612057), Panorama Hills (3511926), Pechanga (3311741), Pismo Beach (3512026), Point Conception (3412044), Point Loma (3211762), Port San Luis (3512027), Poway (3211781), Riverside East (3311783), Sacate (3412043), San Bernardino South (3411713), San Clemente (3311745), San Dimas (3411717), San Francisco South (3712264), San Jose East (3712137), San Luis Obispo (3512036), San Mateo (3712253), Santa Catalina East (3311833), Santa Cruz Island A (3311987), Santa Cruz Island B (3311986), Santa Rosa Island North (3312081), Santa Ynez (3412051), Shedd Canyon (3512054), Success Dam (3611818), Thousand Oaks (3411827), Topo Valley (3612141), Tranquillon Mtn. (3412055), Triunfo Pass (3411818), Tumey Hills (3612056), Tustin (3311767), Wilson Corner (3512044), Woodside (3712243) | |
Threat List Data from the CNDDB
| Threat List Total: | 13 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 12 | 12 % | |
| ORV activity | 5 | 5% |
| Development | 4 | 4% |
| Non-native plant impacts | 3 | 3% |
| Grazing | 2 | 2% |
| Improper burning regime | 1 | 1% |
| Military operations | 1 | 1% |
| Erosion/runoff | 1 | 1% |
| Feral pigs | 1 | 1% |
| Foot traffic/trampling | 1 | 1% |
| Other | 1 | 1% |
| Recreational use (non-ORV) | 1 | 1% |
| Road/trail construction/maint. | 1 | 1% |
| Wood cutting or brush clearing | 1 | 1% |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 3 March 2025].