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)



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]. 2019. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: Jan 17, 2019).