McHenry County Conservation District / McHenry County College / RagweedGreat
Summer Wildflower - White & Green Gallery
Information: MCCD #(815) 338-6223

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RagweedGreat Common Name:
Great Ragweed
 
 
Scientific Name: Ambrosia trifida

 

Habitat/Season: Successional Areas / June-October

 

Comment: Native Like its relative Common Ragweed, this species causes hay fever. Unlike Common Ragweed, however, it can grow up to 15 feet tall.