Taxon  Report   10384 
Sonchus asper  (L.) Hill
Spiny sowthistle

Sonchus asper
© 2005 Steve Matson
Sonchus 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 + photos)

point, line, or polygon

one or more occurrences within a 7.5-minute quadrangle

 Plant Characteristics
 and Associations

Bloom Period
Sonchus asper
© 2006 Louis-M. Landry
Genus: Sonchus
Subspecies and Varieties:
weed, characteristic of disturbed places, wetland-riparian
Habitat: disturbed [Walker]
Wetlands:Equally likely to occur in wetlands or non wetlands [U.S. Fish & Wildlife Service.]
Distribution by County 

Add an Observation of  Sonchus asper

Name Status:
Accepted by TJM2 + PLANTS + JM93
Alternate Names:
(according to)

PLANTS: Sonchus asper ssp. glaucescens
PLANTS: Sonchus nymanii
 More information about  Sonchus asper

Photos on CalPhotos / Google Images

website references on Google

UC Integrated Pest Management Weed Photo Gallery
(profile of this plant as an agricultural weed)

Jepson eFlora

Records from the Consortium of California Herbaria

Search (Flora of North America)

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]. 2015. Berkeley, California: The Calflora Database [a non-profit organization].
Available:   (Accessed: Nov 27, 2015).

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

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