Species Details

Cirsium occidentale var. lucianum

Cuesta Ridge thistle

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Scientific Name:
Cirsium occidentale (Nutt.) Jeps. var. lucianum D.J. Keil
Common Name:
Cuesta Ridge thistle
Family: Asteraceae
Element Code: PDAST2E1Z6
USDA Plants Symbol:
Synonyms/Other Names:
Lifeform: perennial herb
Blooming Period: Apr-Jun
Elevation:
500 - 750 meters
1640 - 2460 feet
General Habitat:
  • Chaparral (openings)
General Micro Habitat:
Micro Habitat:
  • Disturbed areas
  • Roadsides
  • Rocky (often)
  • Serpentinite
  • Slopes (often)
Notes:
Known only from fewer than 10 extant occurrences in the southern Santa Lucia Mtns. Of SLO Co. Possibly threatened by fire suppression. Similar to var. californicum. Not in The Jepson Manual (1993). See Sida 21(1):207-219 (2004) for original description.
Threats:
Taxonomy:
Other:
Total Occurrences: 10
Element Occurrence Ranks:
A B C D X U
0 0 0 0 0 10
Occurrence Status:
Historical >20 Years 4
Recent <=20 Years 6
Presence:
Presumed Extant 10
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
San Luis Obispo (SLO)
Quads: Name (Quad Code)
Atascadero (3512046), Lopez Mtn. (3512035), Morro Bay North (3512047), San Luis Obispo (3512036), Santa Margarita Lake (3512034)
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