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Trillium undulatum is a species of perennial herb in the family Melanthiaceae. They are native to Eastern North America, Canada, and The Contiguous United States. Flowers are visited by Anthaxia, Sphaerophoria bifurcata, Anthaxia expansa, and Dialictus.

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EOL has data for 11 attributes, including:

Known occurrences, collected specimens and observations of Trillium undulatum Willd.. View this species on GBIF