Cirsium ciliolatum
Common Name: Ashland thistle
Family: Asteraceae
Element Code: PDAST2E0P0
Full Name: Cirsium ciliolatum (Henders.) J.T. Howell

Biology Glossary
Rarity Status Glossary
Occurrence Data from DFG
California Natural Diversity Database Glossary
  • Total # of Known Element Occurrences: 5
  • Element Occurrence Ranks:
    A B C D X U
    0 1 0 0 0 4
  • Population Status:
    >20 yrs
    <=20 yrs
    4 1
  • Presence:
    Present Extant Possibly Extirpated Extirpated
    5 0 0
Notes Glossary
  • Known in CA from fewer than ten occurrences. Threatened by agriculture and road maintenance. Possibly threatened by grazing. On review list in OR. See Bulletin of the Torrey Botanical Club 27:348 (1900) for original description.
  • To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page.
  • Date Added: 1980-01-01
  • Last Update: 2016-08-17
Location Glossary
  • Elevation: 800 - 1400 meters
  • California Endemic: no
  • States: California, Oregon
  • California Counties and Islands:   name (code)
    Siskiyou (SIS)
  • Quads:   name (DWR code) USGS code
    Duzel Rock (717C) 41122E6,  Bogus Mountain (733C) 41122G4,  Dewey Gulch (733D) 41122G3
  • 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 481
Links to Leading Resources of Taxon Information
Suggested Citation
CNPS, Rare Plant Program. . Inventory of Rare and Endangered Plants (online edition, v8-02). California Native Plant Society, Sacramento, CA. Website [accessed ].

41122E6=Duzel Rock (717C) 41122E6;41122G4=Bogus Mountain (733C) 41122G4;41122G3=Dewey Gulch (733D) 41122G3