Taxon  Report   300 
Ambrosia trifida  L.
Giant ragweed
Ambrosia trifida
© 2008 Louis-M. Landry
Click on a photo to see it bigger.
CalPhotos
Ambrosia trifida
© 2010 Jean Pawek
Ambrosia trifida
© 2001 CDFA
Ambrosia trifida, 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 + photos)



point, line, or polygon

one or more occurrences
within a 7.5-minute quadrangle

Plant Characteristics
and Associations



Bloom Period
Ambrosia trifida
© 2015 Richard Spellenberg
Family: ASTERACEAE  
Genus: Ambrosia
Communities:
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.]
Name Status:
Accepted by TJM2 + PLANTS + JM93
 
More information about  Ambrosia trifida
Photos on CalPhotos / Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

Original Publication citation (ITIS)

USDA PLANTS Profile (AMTR)

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]. 2016. Berkeley, California: The Calflora Database [a non-profit organization].
Available: http://www.calflora.org/   (Accessed: Sep 25, 2016).

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