Species Details

Cirsium crassicaule

slough thistle

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Scientific Name:
Cirsium crassicaule (Greene) Jeps.
Common Name:
slough thistle
Family: Asteraceae
Element Code: PDAST2E0U0
USDA Plants Symbol: CICR
Synonyms/Other Names:
Lifeform: annual/perennial herb
Blooming Period: May-Aug
Elevation:
3 - 100 meters
10 - 330 feet
General Habitat:
  • Chenopod scrub
  • Marshes and swamps (sloughs)
  • Riparian scrub
General Micro Habitat:
Micro Habitat:
Notes:
Threatened by agriculture and non-native plants. Population sizes fluctuate widely.
Threats:
Taxonomy:
Other:
References:
Total Occurrences: 18
Element Occurrence Ranks:
A B C D X U
0 6 1 0 2 9
Occurrence Status:
Historical >20 Years 17
Recent <=20 Years 1
Presence:
Presumed Extant 16
Possibly Extirpated 2
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Kern (KRN), Kings (KNG), San Joaquin (SJQ)
Quads: Name (Quad Code)
Hacienda Ranch (3511975)?*, Lathrop (3712173), Lone Tree Well (3511976), Lost Hills NE (3511965), Lost Hills NW (3511966), Semitropic (3511955), Tupman (3511933), Vernalis (3712163), Wasco SW (3511954)
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