Taxon  Report   119 
Ageratina occidentalis  (Hook.) R. King & H. Robinson
Western eupatorium,  Western joepiweed, Western snakeroot
Ageratina occidentalis
© 2009 Julie Kierstead Nelson
Click on a photo to see it bigger.
Ageratina occidentalis
© 2010 Ron Wolf
Ageratina occidentalis
© 2010 Ron Wolf
Ageratina occidentalis, a dicot, is a perennial herb that is native to California and is also found outside of California, but is confined to western North America.

Interactive Distribution Map

Observation Hotline
(observation details + photos)

point, line, or polygon

Plant Characteristics
and Associations

Bloom Period
Ageratina occidentalis
© 2003 Christopher L. Christie
Genus: Ageratina
Yellow Pine Forest, Red Fir Forest, Lodgepole Forest, Redwood Forest, Douglas-Fir Forest
Distribution by County 

Add an Observation of  Ageratina occidentalis

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

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 CalPhotos / Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

Original Publication citation (ITIS)


Search the International Plants Names Index

Search (Flora of North America)

Search the Lady Bird Johnson Wildflower Center

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:   (Accessed: Feb 23, 2018).

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