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2016 Keir Morse   cc-by-nc-sa-3.0

Helianthus giganteus (Giant Sunflower) is a species of perennial herb in the family Asteraceae. They have a self-supporting growth form. They are native to Canada, The Contiguous United States, and North America. They have simple, broad leaves. Individuals can grow to 3 m.

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EOL has data for 18 attributes, including:

Known occurrences, collected specimens and observations of giant sunflower. View this species on GBIF