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Definition of Perennial ragweed
1. Noun. Coarse perennial ragweed with creeping roots of dry barren lands of southwestern United States and Mexico.
Exact synonyms: Ambrosia Psilostachya, Western Ragweed
Generic synonyms: Ambrosia, Bitterweed, Ragweed
Generic synonyms: Ambrosia, Bitterweed, Ragweed