Taxon  Report   7681    
Sonchus asper  (L.) Hill  ssp. asper 
Prickly sow thistle,  Sow thistle
Sonchus asper ssp. asper
© 2011 Zoya Akulova
Photos from
CalPhotos / Calflora
Sonchus asper ssp. asper
© 2010 Zoya Akulova
Sonchus asper ssp. asper
© 2008 Keir Morse
Sonchus asper ssp. asper, a dicot, is an annual herb that is not native to California; it was introduced from elsewhere and naturalized in the wild.

Interactive Distribution Map

Observation Hotline
(observation details)

point, line, or polygon

one or more occurrences
within a 7.5-minute quadrangle

Plant Characteristics
and Associations

Bloom Period
Sonchus asper ssp. asper
© 2006 Brent Miller
Genus: Sonchus
Parent: Sonchus asper
Communities: weed, characteristic of disturbed places, wetland-riparian

Arid West: Equally likely to occur in wetlands and non wetlands
Mountains, Valleys and Coast: Occurs usually in non wetlands, occasionally in wetlands

Habitat: disturbed

Name Status:
Accepted by JEF

More information about  Sonchus asper ssp. asper
Photos on   /   Google Images
UC Integrated Pest Management Weed Photo Gallery
(profile of this plant as an agricultural weed)

Jepson eFlora

Records from the Consortium of California Herbaria

ITIS Original Publication citation


Search the International Plants Names Index

Search (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:   (Accessed: Dec 14, 2018).

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