IUCN threat status:

Not evaluated

Comprehensive Description

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Common Ragweed is a major cause of hay fever during the late summer and fall. Aside from this unfortunate characteristic, it has considerable ecological value to various birds and moths, and therefore it isn't necessarily desirable to destroy this plant on sight. Compared to other Ambrosia spp. (Ragweeds) that occur in Illinois, Common Ragweed has more deeply pinnatifid leaves.

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© John Hilty

Source: Illinois Wildflowers

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