Taxon Details
Isocoma menziesii var. decumbens
decumbent goldenbush
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Taxon Summary:
Isocoma menziesii var. decumbens, commonly known as decumbent goldenbush, is a perennial shrub in the Asteraceae that is found in California and elsewhere. It occurs within Chaparral, Coastal scrub (often disturbed areas, and sandy), growing at elevations from 10 to 250 meters. Isocoma menziesii var. decumbens is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.|
Scientific Name: Isocoma menziesii (H. & A.) G. Nesom var. decumbens (Greene) G. Nesom |
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Common Name: decumbent goldenbush |
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| Family: | Asteraceae | |
| Element Code: | PDAST57091 | |
| USDA Plants Symbol: | ISMED | |
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Synonyms/Other Names: |
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| Name Status: |
JEF, FNA, POWO, IPNI, Tropicos |
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| CA Rare Plant Rank: | 1B.2 |
| Fed List: | None |
| State List: | None |
| Global Rank: | G3G5T2T3 |
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State Rank: |
S2 |
| Other Status: | BLM_S; SB_CRES |
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CRPR Changes: |
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| Add Date: | 1994-01-01 |
| Date Edited: | 2022-12-06 |
| Lifeform: perennial shrub | ||||||||||||||
Blooming Period: Apr-Nov
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Elevation:
10 - 250 meters 35 - 820 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
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Microhabitat:
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Notes: 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. |
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Threats: |
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Taxonomy: |
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| Threat List Total: | 10 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 28 | 22 % |
| THREAT LIST: | ||
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| Non-native plant impacts | 15 | 11% |
| Development | 11 | 8% |
| ORV activity | 4 | 3% |
| Foot traffic/trampling | 2 | 1% |
| Improper burning regime | 2 | 1% |
| Road/trail construction/maint. | 2 | 1% |
| Vandalism/dumping/litter | 1 | 0% |
| Erosion/runoff | 1 | 0% |
| Other | 1 | 0% |
| Recreational use (non-ORV) | 1 | 0% |
| Total Occurrences: | 126 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 2 | 14 | 3 | 3 | 2 | 102 |
| Occurrence Status: | |||||
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| Historical >20 Years | 46 | ||||
| Recent <=20 Years | 80 | ||||
| Presence: | |||||
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| Presumed Extant | 124 | ||||
| Possibly Extirpated | 1 | ||||
| Presumed Extirpated | 1 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) Baja California (BA), California (CA) |
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California Counties and Islands: Name (Code) Los Angeles (LAX), Orange (ORA), San Diego (SDG), Ventura (VEN) |
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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) |
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Notes:
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Presumed Extant
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