Calflora
Taxon  Report   10384    
Sonchus asper  (L.) Hill
Spiny sowthistle
Sonchus asper
© 2006 Louis-M. Landry
Photos from
CalPhotos / Calflora
Sonchus asper
© 2005 Steve Matson
Sonchus asper
© 2009 Zoya Akulova
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
© 2004 Robert E. Preston, Ph.D.
Communities: weed, characteristic of disturbed places, wetland-riparian

Wetlands:
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 ICPN + PLANTS

Alternate Names:
PLANTS: Sonchus asper ssp. glaucescens
PLANTS: Sonchus nymanii
More information about  Sonchus asper
Photos on PlantID.net   /   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

USDA PLANTS Profile (SOAS)

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: http://www.calflora.org/   (Accessed: Oct 21, 2018).

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