Species Details

Isocoma menziesii var. decumbens

decumbent goldenbush

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Scientific Name:
Isocoma menziesii (H. & A.) G. Nesom var. decumbens (Greene) G. Nesom
Common Name:
decumbent goldenbush
Family: Asteraceae
Element Code: PDAST57091
USDA Plants Symbol: ISMED
Synonyms/Other Names:
Lifeform: perennial shrub
Blooming Period: Apr-Nov
10 - 250 meters
35 - 820 feet
General Habitats:
  • Chaparral
  • Coastal scrub (often disturbed areas, sandy)
Microhabitat Details:
Need quads for SCM and SCT islands. Threatened by development. Equals Haplopappus venetus ssp. furfuraceus, a synonym of I. menziesii var. menziesii in The Jepson Manual. See Leaflets of Botanical Observation and Criticism 1:172 (1906) for original description, and Phytologia 70(2):69-114 (1991) for taxonomic treatment.
Threat List Total: 10
Total EOs % of EOs
EOs with Threat Listed: 28 22 %
Non-native plant impacts 15 11%
Development 11 8%
ORV activity 4 3%
Foot traffic/trampling 2 1%
Improper burning regime 2 1%
Total Occurrences: 126
Element Occurrence Ranks:
2 14 3 3 2 102
Occurrence Status:
Historical >20 Years 40
Recent <=20 Years 86
Presumed Extant 124
Possibly Extirpated 1
Presumed Extirpated 1
California Endemic:
California Island:
States: Name (Code)
Baja California (BA), California (CA)
California Counties and Islands: Name (Code)
Los Angeles (LAX), Orange (ORA), San Diego (SDG), Ventura (VEN)
Quads: Name (Quad Code)
Alpine (3211677), Del Mar (3211782), Dulzura (3211667), El Cajon (3211678), Encinitas (3311713), Escondido (3311711), Imperial Beach (3211751), Jamul Mountains (3211668), La Jolla (3211772), La Mesa (3211771), Laguna Beach (3311757), Las Pulgas Canyon (3311734), Live Oak Springs (3211663), Long Beach (3311872), Malibu Beach (3411816), Margarita Peak (3311744), National City (3211761), Newport Beach (3311768), Oceanside (3311724), Otay Mesa (3211658), Point Loma (3211762), Potrero (3211655), Poway (3211781), Ramona (3311617), Rancho Santa Fe (3311712), San Clemente (3311745), San Clemente Island South (3211873), San Luis Rey (3311723), San Marcos (3311722), San Nicolas Island (3311924), San Onofre Bluff (3311735), San Pedro (3311863), San Vicente Reservoir (3211688), Santa Catalina East (3311833), Santa Catalina North (3311844), Santa Catalina South (3311834), Santa Catalina West (3311845), Tecate (3211656), Torrance (3311873)
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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