Calflora
Taxon  Report   11667    
Erigeron canadensis  L.
Canada horseweed
Erigeron canadensis
© 2005 Luigi Rignanese
Photos from
CalPhotos / Calflora
Erigeron canadensis
© 2010 Louis-M. Landry
Erigeron canadensis
© 2009 Neal Kramer
Erigeron canadensis, a dicot, is an annual herb that is native to California, is also found elsewhere in North America and beyond.

Interactive Distribution Map


Observation Hotline
(observation details)



point, line, or polygon

Plant Characteristics
and Associations



Bloom Period
Erigeron canadensis
© 2018 Brian Charles
Family: ASTERACEAE  
Genus: Erigeron
Communities: weed, characteristic of disturbed places, wetland-riparian

Wetlands: Occurs usually in non wetlands, occasionally in wetlands

Habitat: disturbed

Name Status:
Accepted by JEF

PLANTS accepted name:
Conyza canadensis var. canadensis

Alternate Names:
ICPN: Conyza canadensis
ICPN: Conyza canadensis var. canadensis
More information about  Erigeron canadensis
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 (COCAC3)

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: https://www.calflora.org/   (Accessed: Dec 12, 2018).

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