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Ambrosia trifida
giant ragweed Aster Family
Ambrosia trifida Asteraceae
common names
  giant ragweed
  great ragweed
accepted scientific name
  Ambrosia trifida L.
rules for finding collection records
  Ambrosia trifida (4164)
family name
Image Author: ©2010 Jean Pawek
Image License: CC BY
Image Source
Category: Wildflowers
Flowers: No obvious petals
Petal colors: color
Flower size is about 0.1 inches
Leaf: Opposite
Plant Observed beginning of June thru end of October
Native, Invasive in CA, DE, IL

How Likely at this Location (94%)
Name Match (100%)
Plant Showiness (27%)
base map where plant found
mag select

grid lines base