Wildflower Identification Website
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Suisun thistle
Cirsium hydrophilum
Suisun thistle Aster Family
Cirsium hydrophilum Asteraceae
common names
  Suisun thistle
  Mt. Tamalpais thistle
accepted scientific name
  Cirsium hydrophilum (Greene) Jeps.
rules for finding collection records
  Cirsium hydrophilum (41)
  Cirsium vaseyi (1)
family name
Image Author: ©2010 Doug Wirtz
Image License: CC BY-NC-SA
Image Source
Category: Wildflowers
Flowers: No obvious petals
Petal colors: color
Flower size is 0.7 to 1.0 inches
Leaf: Alternate
Plant Observed last week of May thru 1st week of October

How Likely at this Location (10%)
Name Match (100%)
Plant Showiness (54%)
Links to Plant Photos
Cal Photos (44)
Wikimedia Commons (2)
SEINet (1)
base map where plant found
mag select

Native Plant Status
native status map native status map
native Native
native Not Present

grid lines base