Taxon Details
Isocoma arguta
Carquinez goldenbush
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Taxon Summary:
Isocoma arguta, commonly known as Carquinez goldenbush, is a perennial shrub in the Asteraceae that is found only in California. It occurs within Valley and foothill grassland, growing at elevations from 1 to 20 meters. Isocoma arguta is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.
Scientific Name: Isocoma arguta Greene |
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Common Name: Carquinez goldenbush |
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Family: | Asteraceae | |
Element Code: | PDAST57050 | |
USDA Plants Symbol: | ISAR2 | |
Synonyms/Other Names: |
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Name Status: |
JEF, FNA, POWO, IPNI, Tropicos |
CA Rare Plant Rank: | 1B.1 |
Fed List: | None |
State List: | None |
Global Rank: | G1 |
State Rank: |
S1 |
Other Status: | SB_UCBG |
CRPR Changes: |
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Add Date: | 1994-01-01 |
Date Edited: | 2025-09-09 |
Lifeform: perennial shrub | ||||||||||||||
Blooming Period: Aug-Dec
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Elevation:
1 - 20 meters 5 - 65 feet |
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General Habitats:
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Microhabitat Details: | ||||||||||||||
Microhabitat:
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Notes: |
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Threats: Threatened by grazing and trampling at Jepson Prairie Preserve. Threatened by development and agriculture elsewhere. |
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Taxonomy: See Manual of the Botany of the Region of San Francisco Bay, p. 175 (1894) by E. Greene for original description, and Phytologia 70(2):69-114 (1991) for taxonomic treatment. |
Threat List Total: | 7 | |
Total EOs | % of EOs | |
EOs with Threat Listed: | 8 | 57 % |
THREAT LIST: | ||
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Grazing | 3 | 21% |
Road/trail construction/maint. | 3 | 21% |
Other | 1 | 7% |
Recreational use (non-ORV) | 1 | 7% |
Agriculture | 1 | 7% |
Biocides | 1 | 7% |
Development | 1 | 7% |
Total Occurrences: | 14 | ||||
Element Occurrence Ranks: | |||||
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A | B | C | D | X | U |
0 | 4 | 3 | 0 | 0 | 7 |
Occurrence Status: | |||||
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Historical >20 Years | 7 | ||||
Recent <=20 Years | 7 |
Presence: | |||||
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Presumed Extant | 14 | ||||
Possibly Extirpated | 0 | ||||
Presumed Extirpated | 0 |
California Endemic: | |||||||||||||
California Island: | |||||||||||||
States: Name (Code) California (CA) |
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California Counties and Islands: Name (Code) Contra Costa (CCA), Solano (SOL) |
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Quads: Name (Quad Code) Benicia (3812212), Birds Landing (3812127), Briones Valley (3712282), Cordelia (3812222), Denverton (3812128), Dozier (3812137), Elmira (3812138), Mare Island (3812213), Vine Hill (3812211), Walnut Creek (3712281) |
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Notes:
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