Taxon Report
Centromadia parryi (Greene) Greene ssp. australis (Keck) B.G. Baldwinsouthern tarplant |
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Classification
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Scientific Name: |
Centromadia parryi (Greene) Greene ssp. australis (Keck) B.G. Baldwin |
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Common Name: |
southern tarplant |
| Family: | Asteraceae |
| Element Code: | PDAST4R0P4 |
| USDA Plants Symbol: | CEPAA |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: May-Nov | May-Nov |
| Elevation: | 0-480 (0-1575) |
| General Habitats: | Marshes and swamps, Valley and foothill grassland, Vernal pools |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G3T2 |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | SB_CalBG/RSABG; SB_CRES; SB_SBBG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 94 |
| Element Occurrence Ranks: | |
| Excellent (A) | 3 |
| Good (B) | 17 |
| Fair (C) | 11 |
| Poor (D) | 4 |
| None (X) | 10 |
| Unknown (U) | 49 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Los Angeles (LAX), Orange (ORA), San Diego (SDG), Santa Barbara (SBA), Ventura (VEN) | |
| Quads: Name (Quad Code) | |
| Anaheim (3311778), Baldwin Park (3411718), Beverly Hills (3411814)*, Canada Gobernadora (3311755), Del Mar (3211782), Dos Pueblos Canyon (3411948), El Monte (3411811), Escondido (3311711), Goleta (3411947), Hollywood (3411813)*, Inglewood (3311883)*, Laguna Beach (3311757), Long Beach (3311872)*, Los Alamitos (3311871), Morro Hill (3311733), Mt. Wilson (3411821), Newbury Park (3411828), Newport Beach (3311768), Orange (3311777), Pasadena (3411822)*, Pitas Point (3411934)(?), San Marcos (3311722), San Pasqual (3311618), Santa Catalina East (3311833)?, Seal Beach (3311861), South Gate (3311882)*, Sunland (3411833), Torrance (3311873), Tustin (3311767), Valley Center (3311721), Venice (3311884)* | |
Threat List Data from the CNDDB
| Threat List Total: | 16 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 43 | 46 % | |
| Development | 20 | 21% |
| Other | 14 | 14% |
| Foot traffic/trampling | 11 | 11% |
| Road/trail construction/maint. | 10 | 10% |
| Non-native plant impacts | 7 | 7% |
| ORV activity | 6 | 6% |
| Disking | 6 | 6% |
| Recreational use (non-ORV) | 5 | 5% |
| Vandalism/dumping/litter | 4 | 4% |
| Agriculture | 3 | 3% |
| Grazing | 3 | 3% |
| Waterway bank protection/maintenance | 2 | 2% |
| Wood cutting or brush clearing | 1 | 1% |
| Hybridization | 1 | 1% |
| Military operations | 1 | 1% |
| Mining | 1 | 1% |
Notes
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Need confirmation of SCT Isl. occurrences. Many ORA Co. occurrences recently extirpated. Many historical occurrences also extirpated; need information. Population fragmentation a serious problem, and plant continues to be threatened by urbanization, vehicles, development, foot traffic, grazing, habitat disturbance, and competition from non-native plants. A synonym of Hemizonia parryi |
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Threats: |
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Taxonomy: |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 5 January 2025].