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Epilobium hirsutum (Great Willowherb) is a species of perennial herb in the family Onagraceae. It has a self-supporting growth form. It is associated with freshwater habitat. Great Willowherb has simple, broad leaves. Flowers are visited by Honey bee. Great Willowherb is a photoautotroph. Individuals can grow to 1 m.

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EOL has data for 26 attributes, including:

Known occurrences, collected specimens and observations of Great Willowherb. View this species on GBIF