Taxon  Report   119    
Ageratina occidentalis  (Hook.) R. M. King & H. Rob.
Western eupatorium,  Western joepiweed, Western snakeroot
Ageratina occidentalis
© 2003 Christopher L. Christie
Photos from
CalPhotos / Calflora
Ageratina occidentalis
© 2013 mark kircher
Ageratina occidentalis
© 2016 mark kircher
Ageratina occidentalis, a dicot, is a perennial herb that is native to California, is also found outside of California, but is confined to western North America.

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point, line, or polygon

Plant Characteristics
and Associations

Bloom Period
Ageratina occidentalis
© 2012 James Gonsman
Genus: Ageratina
Communities: Yellow Pine Forest, Red Fir Forest, Lodgepole Forest, Redwood Forest, Douglas-Fir Forest
Name Status:
Accepted by JEF + PLANTS

Alternate Names:
PLANTS: Eupatorium occidentale
More information about  Ageratina occidentalis
Nursery / seed vendor availability from CNPLX
This plant is available commercially.
Landscaping information from Calscape
Photos on   /   Google Images
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]. 2019. Berkeley, California: The Calflora Database [a non-profit organization]. Available:   (Accessed: Jan 17, 2019).