Calflora
Taxon  Report   290    
Ambrosia artemisiifolia  L.
Annual ragweed,  Common ragweed, Low ragweed
Ambrosia artemisiifolia
© 2006 Louis-M. Landry
Photos from
CalPhotos / Calflora
Ambrosia artemisiifolia
© 2006 Louis-M. Landry
Ambrosia artemisiifolia
© 2015 Richard Spellenberg
Ambrosia artemisiifolia, a dicot, is an annual herb that is not native to California; it was introduced from elsewhere and naturalized in the wild.

Interactive Distribution Map


Observation Hotline
(observation details)



point, line, or polygon

Plant Characteristics
and Associations



Bloom Period
Ambrosia artemisiifolia
© 2018 Jennifer Mo
Family: ASTERACEAE  
Genus: Ambrosia
Communities: weed, characteristic of disturbed places

Wetlands: Occurs usually in non wetlands, occasionally in wetlands

Habitat: disturbed

Name Status:
Accepted by ICPN + PLANTS

Alternate Names:
ICPN: Ambrosia artemisiifolia var. elatior
More information about  Ambrosia artemisiifolia
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Photos on PlantID.net   /   Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

ITIS Original Publication citation

USDA PLANTS Profile (AMAR2)

Search the International Plants Names Index

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 15, 2018).