Taxon  Report   298 
Ambrosia psilostachya  DC.
Ragweed,  western ragweed

Ambrosia psilostachya
© 2011 Aaron Arthur
Ambrosia psilostachya
© 2012 Richard Spellenberg
Ambrosia psilostachya
© 2011 Aaron Arthur
Ambrosia psilostachya, a dicot, is a perennial herb that is native to California and is also found elsewhere in North America and beyond.

 Interactive Distribution Map 

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 Plant Characteristics
 and Associations

Bloom Period
Ambrosia psilostachya
© 2014 Richard Spellenberg
Genus: Ambrosia
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  Ambrosia psilostachya

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

PLANTS: Ambrosia californica
PLANTS: Ambrosia coronopifolia
PLANTS: Ambrosia cumanensis
PLANTS: Ambrosia psilostachya var. californica
PLANTS: Ambrosia psilostachya var. coronopifolia
PLANTS: Ambrosia psilostachya var. lindheimeriana
PLANTS: Ambrosia rugelii
 More information about  Ambrosia psilostachya
Location Suitability

Nursery / seed vendor availability from CNPLX
This plant is available commercially.


Photos on CalPhotos / Google Images

website references on Google

Jepson eFlora

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: Oct 13, 2015).

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