Species Details

Centromadia pungens ssp. laevis

smooth tarplant

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Scientific Name:
Centromadia pungens (H. & A.) Greene ssp. laevis (Keck) B.G. Baldwin
Common Name:
smooth tarplant
Family: Asteraceae
Element Code: PDAST4R0R4
USDA Plants Symbol: CEPUL
Synonyms/Other Names:
Lifeform: annual herb
Blooming Period: Apr-Sep
0 - 640 meters
0 - 2100 feet
General Habitats:
  • Chenopod scrub
  • Meadows and seeps
  • Playas
  • Riparian woodland
  • Valley and foothill grassland
Microhabitat Details:
  • Alkaline
Many historical occurrences may be extirpated; need information. Frequently confused with other Centromadia species such as C. parryi ssp. australis in ORA, LAX, and SDG cos., and C. pungens ssp. pungens in KRN Co. Need historical quads for ORA Co. Threatened by foot traffic, agriculture, road maintenance, disking, urbanization, hydrological alterations, and flood control projects. A synonym of Hemizonia pungens ssp. laevis in TJM (1993). See MadroƱo 3:14 (1935) for original description, and Novon 9:462-471 (1999) for revised nomenclature.
Threat List Total: 15
Total EOs % of EOs
EOs with Threat Listed: 77 56 %
Development 45 32%
Other 24 17%
Agriculture 20 14%
Disking 18 13%
Road/trail construction/maint. 16 11%
Total Occurrences: 137
Element Occurrence Ranks:
2 13 25 9 14 74
Occurrence Status:
Historical >20 Years 67
Recent <=20 Years 70
Presumed Extant 123
Possibly Extirpated 8
Presumed Extirpated 6
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Los Angeles (LAX), Riverside (RIV), San Bernardino (SBD), San Diego (SDG)
Quads: Name (Quad Code)
Alberhill (3311764), Anza (3311656), Bachelor Mtn. (3311751), Beaumont (3311688), Bonsall (3311732), Borrego Sink (3311623)*, Corona North (3311785), El Cajon (3211678)*, El Casco (3311781), Escondido (3311711), Harrison Mtn. (3411722)*, Hemet (3311668), Lake Elsinore (3311763), Lake Mathews (3311774), Lakeview (3311771), Las Pulgas Canyon (3311734), Morro Hill (3311733), Murrieta (3311752), Oceanside (3311724)*, Pasadena (3411822), Perris (3311772), Prado Dam (3311786), Redlands (3411712), Riverside East (3311783), Romoland (3311762), San Bernardino North (3411723), San Bernardino South (3411713)*, San Jacinto (3311678), San Luis Rey (3311723)*, San Pasqual (3311618), San Pedro (3311863), Steele Peak (3311773), Sunnymead (3311782), Temecula (3311742), Torrance (3311873), Warners Ranch (3311626), Wildomar (3311753), Winchester (3311761)
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.
Presumed Extant
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