Taxon  Report   2134 
Cirsium hydrophilum  (E. Greene) Jepson  var. vaseyi  (A. Gray) J. Howell
Mt. tamalpais thistle,  Vasey's thistle
Cirsium hydrophilum var. vaseyi
© 2009 Vernon Smith
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Cirsium hydrophilum var. vaseyi, a dicot, is a perennial herb that is native to California and is endemic (limited) to California.
It is included in the CNPS Inventory of Rare and Endangered Plants on list 1B.2 (rare, threatened, or endangered in CA and elsewhere).   7th Edition  /  8th Edition

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point, line, or polygon

one or more occurrences within a 7.5-minute quadrangle

Plant Characteristics
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Bloom Period
Cirsium hydrophilum var. vaseyi
© 1999 John Game
Family: ASTERACEAE  
Genus: Cirsium
Parent Record Cirsium hydrophilum
Communities:
Mixed Evergreen Forest, Chaparral, wetland-riparian
Habitat: seeps [CNPS Inventory]
Wetlands:Occurs almost always under natural conditions in wetlands [U.S. Fish & Wildlife Service.]
AFFINITY to serpentine soil:   6.1 (strict endemic)   [Safford et al 2005]
Distribution by County 

Add an Observation of  Cirsium hydrophilum var. vaseyi

Name Status:
Accepted by TJM2 + CNPS + PLANTS + JM93
Alternate Names:
(according to)

PLANTS: Cirsium montigenum
PLANTS: Cirsium vaseyi
PLANTS: Cnicus breweri var. vaseyi
More information about  Cirsium hydrophilum var. vaseyi
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Photos on CalPhotos / Google Images

Photos and ID tips from PlantID.net

Jepson eFlora

Records from the Consortium of California Herbaria

USDA PLANTS Profile (CIHYV)

Original Publication citation (ITIS)

Search the International Plants Names Index

Search efloras.org (Flora of North America)

Search the Lady Bird Johnson Wildflower Center

website references from Google


Suggested Citation
Calflora: Information on California plants for education, research and conservation,
with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria.
[web application]. 2016. Berkeley, California: The Calflora Database [a non-profit organization].
Available: http://www.calflora.org/   (Accessed: Feb 12, 2016).

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