Calflora
Taxon  Report   9634    
Pleiacanthus spinosus  (Nutt.) Rydb.
Thorn skeletonweed
Pleiacanthus spinosus
© 2005 Steve Matson
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, 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
© 2010 Lee Dittmann
Family: ASTERACEAE  
Genus: Pleiacanthus
Communities: Sagebrush Scrub, Pinyon-Juniper Woodland, Yellow Pine Forest
Name Status:
Accepted by JEF + PLANTS

Alternate Names:
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 PlantID.net   /   Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

USDA PLANTS Profile (PLSP7)

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 17, 2018).

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