CNPS Inventory Plant Detail

Isocoma arguta

Common Name:	Carquinez goldenbush
Family:	Asteraceae
Synonyms:
Element Code:	PDAST57050
Full Name:	Isocoma arguta Greene
USDA PLANTS Symbol:	ISAR2

Biology
Lifeform: perennial shrub Blooming Period: August - December Habitat: • Valley and foothill grassland (alkaline)

Rarity Status
CA Rare Plant Rank: 1B.1 Rare, threatened, or endangered in California and elsewhere .1: Seriously endangered in California Federal Listing Status: Not Listed State Listing Status: Not Listed State Rank: S1 S1: Critically Imperiled. Global Rank: G1 G1: Critically Imperiled.

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 14
Element Occurrence Ranks:

A B C D X U

0 3 2 0 0 9

Population Status:

Historic >20 yrs	Recent <=20 yrs
6	8

Presence:

Present Extant	Possibly Extirpated	Extirpated
14	0	0

Notes
Probably threatened by development and agriculture. 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. To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page. Date Added: 1994-01-01 Last Update: 2010-03-15

Location

Elevation: 1 - 20 meters

California Endemic: yes

States: California

California Counties and Islands: name (code)
Solano (SOL)

Quads: name (DWR code) USGS code
Birds Landing (481A) 38121B7, Denverton (481B) 38121B8, Antioch North (481D) 38121A7, Benicia (482C) 38122A2, Elmira (498C) 38121C8, Dozier (498D) 38121C7

Notes:

Definitions of codes preceding a county and/or quad:
*		Presumed extirpated
?		Uncertain about distribution or identity
?*		Uncertain about distribution, but presumed extirpated if once present
(?)		Occurrence confirmed, but possibly extirpated

Species may be present in other areas where conditions are favorable.

Presumed Extant

Presumed Extirpated or Unknown

1264

Links to Leading Resources of Taxon Information
USDA PLANTS Calflora CalPhotos Consortium of California Herbaria California Department of Fish and Game: CNDDB Quick Viewer

Suggested Citation
California Native Plant Society (CNPS). Inventory of Rare and Endangered Plants (online edition, v8-01a). California Native Plant Society. Sacramento, CA. Accessed on .

-121.875,38.125