Taxon  Report   9634 
Pleiacanthus spinosus  (Nutt.) Rydb.
Thorn skeletonweed
Pleiacanthus spinosus
© 2010 Lee Dittmann
More photos from
CalPhotos / Calflora
Pleiacanthus spinosus
© 2013 Barry Breckling
Pleiacanthus spinosus
© 2005 Steve Matson
Pleiacanthus spinosus, a dicot, is a perennial herb that is native to California and is also found outside of California, but is confined to western North America.

Interactive Distribution Map

Observation Hotline
(observation details + photos)

point, line, or polygon

Plant Characteristics
and Associations

Bloom Period
Pleiacanthus spinosus
© 2005 Steve Matson
Genus: Pleiacanthus
Sagebrush Scrub, Pinyon-Juniper Woodland, Yellow Pine Forest
Distribution by County 

Add an Observation of  Pleiacanthus spinosus

Name Status:
Accepted by JEF + PLANTS
Alternate Names:
(according to)

PLANTS: Lygodesmia spinosa
ICPN + PLANTS: Stephanomeria spinosa
More information about  Pleiacanthus spinosus
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Landscaping information from Calscape
Photos on CalPhotos / Google Images
Photos on

Jepson eFlora

Records from the Consortium of California Herbaria


Search (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]. 2018. Berkeley, California: The Calflora Database [a non-profit organization].
Available:   (Accessed: Jul 20, 2018).

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