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Rhamnus (Buckthorn) is a genus of tree in the family Rhamnaceae. They are native to Canada and The Contiguous United States. They have drupe. Flowers are visited by null, Great Purple Hairstreak, and Junonia grisea. Individuals can grow to 19 m.

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EOL has data for 14 attributes, including:

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