Calflora
Taxon  Report   2148    
Cirsium rhothophilum  S. F. Blake
Surf thistle
Cirsium rhothophilum
© 1984 California Native Plant Society
Photos from
CalPhotos / Calflora
Cirsium rhothophilum, a dicot, is a perennial herb that is native to California, is endemic (limited) to California.
CNPS Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere).   8th Edition

It is listed by the State of California as Threatened .

Interactive Distribution Map


Observation Hotline
(observation details + photos)



point, line, or polygon

one or more occurrences
within a 7.5-minute quadrangle

Plant Characteristics
and Associations



Bloom Period
Cirsium rhothophilum
© 1984 California Native Plant Society
Family: ASTERACEAE  
Genus: Cirsium
Communities: Coastal Strand, Coastal Sage Scrub

Habitat: dunes, coastal

Name Status:
Accepted by JEF + CNPS + PLANTS

Alternate Names:
PLANTS: Cirsium maritimum
More information about  Cirsium rhothophilum
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Landscaping information from Calscape
Photos on Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

ITIS Original Publication citation

USDA PLANTS Profile (CIRH)

Search the International Plants Names Index

Search efloras.org (Flora of North America)

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]. 2018. Berkeley, California: The Calflora Database [a non-profit organization].
Available: https://www.calflora.org/   (Accessed: Nov 14, 2018).

The information on this page comes from diverse sources. None of the links are sponsored.