giant ragweed

 Plants: Shrub or Subshrub
Magnoliopsida > Asterales > Asteraceae > Ambrosia trifida L.
Synonym(s): blood ragweed, great ragweed, horseweed, perennial ragweed (great), tall ragweed

28 records

 

<View Thumbnails>
Image Descriptor Description Photographer
5374245 Flower(s) Joseph M. DiTomaso
5374246 Foliage Joseph M. DiTomaso
5138079 Foliage Lynn Sosnoskie
5226017 Foliage Richard Old
1559061 Foliage Ohio State Weed Lab Archive
5125059 Foliage Chris Evans
5125060 Foliage Chris Evans
1559055 Infestation Ohio State Weed Lab Archive
1559060 Plant(s)

immature

 Ohio State Weed Lab Archive
1120010 Plant(s) June. Photo from Forest Plants of the Southeast and Their Wildlife Uses by J.H. Miller and K.V. Miller, published by The University of Georgia Press in cooperation with the Southern Weed Science Society. Ted Bodner
1391228 Plant(s) John D. Byrd
1391229 Plant(s) John D. Byrd
1559065 Plant(s)

view from above

 Ohio State Weed Lab Archive
5125058 Plant(s) Chris Evans
5309059 Plant(s) mature plant Theodore Webster
5309060 Plant(s) Theodore Webster
5364523 Plant(s)

Young giant ragweed (Ambrosia trifida) plant.

 Howard F. Schwartz
5226016 Plant(s) Richard Old
5138044 Seed(s) Lynn Sosnoskie
1559054 Seed(s) Ken Chamberlain
1559058 Seed(s) Ken Chamberlain
1559059 Seedling(s) Ohio State Weed Lab Archive
1559052 Seedling(s)

view from above with cotyledons

 Ohio State Weed Lab Archive
1559053 Seedling(s)

cotyledons

 Ohio State Weed Lab Archive
1559062 Seedling(s)

cotyledons

 Ohio State Weed Lab Archive
1559063 Seedling(s) Ohio State Weed Lab Archive
1559064 Seedling(s)

cotyledons

 Ohio State Weed Lab Archive
5374247 Seedling(s) Joseph M. DiTomaso


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