Natural History Misc (1/139)

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Giant Ragweed (Ambrosia trifida). Height: 2-15ft. Pollen of tiny green flowers is spread by wind and is a principal cause of hayfever. Highly adaptive and quickly invades recently disturbed and moist areas. Widely distributed and native to North America.
Giant Ragweed (Ambrosia trifida). Height: 2-15ft. Pollen of tiny green flowers is spread by wind and is a principal cause of hayfever. Highly adaptive and quickly invades recently disturbed and moist areas. Widely distributed and native to North America.
Filename: PRAIRIE056.jpg
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