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2015 Richard Spellenberg   cc-by-nc-sa-3.0

Ambrosia trifida (Great Ragweed) is a species of annual herb in the family Asteraceae. They have a self-supporting growth form. They are associated with freshwater habitat. They are native to The Contiguous United States, Canada, and The Americas. They have simple, broad leaves. Flowers are visited by Tropidia quadrata, Attagenus piceus, Blaesoxipha hunteri, and Empis otiosa. Individuals can grow to 1 m.

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EOL has data for 20 attributes, including:

Known occurrences, collected specimens and observations of great ragweed. View this species on GBIF