Giant Ragweed
Ambrosia trifidaAsteraceae — Aster family
Native
![Giant Ragweed](/images/ambrosia_trifida_1.jpg)
![Giant Ragweed](/images/ambrosia_trifida_2.jpg)
Carousel Farm Park
August 2003
![Giant Ragweed](/images/ambrosia_trifida_3.jpg)
White Clay Creek State Park -- Possum Hill
June 2021
![Giant Ragweed](/images/ambrosia_trifida_4.jpg)
![Giant Ragweed](/images/ambrosia_trifida_5.jpg)
Staminate flowers above pistillate flowers.
White Clay Creek State Park -- Possum HillSeptember 2020
Search Google • Delaware • USDA
Photos copyright David G. Smith
Information from the Delaware Flora Checklist used with author's permission.