Species Details

Chorizanthe robusta var. robusta

robust spineflower

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Scientific Name:
Chorizanthe robusta Parry var. robusta
Common Name:
robust spineflower
Family: Polygonaceae
Element Code: PDPGN040Q2
USDA Plants Symbol: CHROR
Synonyms/Other Names:
Lifeform: annual herb
Blooming Period: Apr-Sep
Elevation:
3 - 300 meters
10 - 985 feet
General Habitat:
  • Chaparral (maritime)
  • Cismontane woodland (openings)
  • Coastal dunes
  • Coastal scrub
General Micro Habitat: sandy or gravelly
Micro Habitat:
Notes:
Most populations extirpated, and now known from only six extended occurrences. Threatened by development, recreation, mining, and non-native plants. See C. robusta in The Jepson Manual. See Phytologia 66(2):130-131 (1989) for taxonomic treatment, and Fremontia 24(4):8-11 (1996) for taxonomic discussion.
Threats:
Taxonomy:
Other:
References:
Total Occurrences: 20
Element Occurrence Ranks:
A B C D X U
2 5 2 0 5 6
Occurrence Status:
Historical >20 Years 9
Recent <=20 Years 11
Presence:
Presumed Extant 15
Possibly Extirpated 5
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Alameda (ALA)*, San Francisco (SFO), San Mateo (SMT)*, Santa Clara (SCL)*, Santa Cruz (SCR)
Quads: Name (Quad Code)
Calaveras Reservoir (3712147), Felton (3712211), Laurel (3712118)*, Los Gatos (3712128)*, Milpitas (3712148), Moss Landing (3612177), Oakland East (3712272)*, Oakland West (3712273), San Francisco South (3712264)*, San Jose East (3712137), San Jose West (3712138)*, San Leandro (3712262), Santa Cruz (3612281), Soquel (3612188), Watsonville West (3612187)
Notes:
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.

Map

Presumed Extant
Counties   Quads