Taxon  Report   2325 
Conyza canadensis  (L.) Cronq.  (not an active name; please see Erigeron canadensis)
Canada horseweed,  Canadian horseweed

Conyza canadensis
© 2009 Zoya Akulova
Conyza canadensis, a dicot, is an annual herb that is native to California and is also found elsewhere in North America and beyond.

 Interactive Distribution Map 

 Observation Hotline 
 (observation details + photos)

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 Plant Characteristics
 and Associations
Conyza canadensis
© 2005 Luigi Rignanese
Genus: Conyza
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  Conyza canadensis

Name Status:
Accepted by PLANTS + JM93
TJM2 accepted name: Erigeron canadensis
 NOTE: Conyza canadensis is not an active name in the Calflora species table.
 More information about  Conyza canadensis
Location Suitability

Nursery / seed vendor availability from CNPLX
Commercial availability unknown.


Photos on CalPhotos / Google Images

website references on Google

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

Records from the Consortium of California Herbaria

Original Publication citation. on the
International Plants Names Index

Search (Flora of North America)

Search the Lady Bird Johnson Wildflower Center

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 25, 2015).

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

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