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Ambrosia trifida
giant ragweed Aster Family
Ambrosia trifida Asteraceae
--more--
common names
  giant ragweed
  great ragweed
accepted scientific name
  Ambrosia trifida L.
rules for finding collection records
  Ambrosia trifida (4165)
family name
  Asteraceae
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
How Likely at this Location (94%)
Name Match (100%)
Plant Showiness (27%)
Links to Plant Descriptions
Minnesota Wildflowers (6)
Illinois Wildflowers (3)
UW Herbarium (10)
Wikipedia
Yavapai County Plants (3)
eFloras.org
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Go Botany
Jepson
Montana Field Guide
SEINet (10)
Flora of Wisconsin (182)
USDA PLANTS profile
Links to Plant Photos
Bioimages (21)
Cal Photos (30)
Wikimedia Commons (13)
Maryland Biodiversity (13)
Carolinas & Georgia (16)
U of Michigan Herbarium (8)
Wildflower Lense (9)
Southeastern Flora (9)
Missouri Plants (4)
UT Austin BIO 406D (5)
Shirley Denton (5)
Connecticut Botanical (3)
East Colorado Wildflowers (3)
base map where plant found
mag select
Disturbed
Riparian
Forest
 Native Plant Status
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native Native
native Not Present

Invasive in some regions.
grid lines base