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Rhamnus cathartica @
BOLD (11);
Colorado State University, Thematic Collection Network (4);
Field Museum of Natural History, Virtual Plants (32);
Illinois Natural History Survey, Erythroneurini (1);
Invasive Plant Atlas of New England (194);
Storey, Malcolm (21);
Burn, Peter (51);
Hattaway, Bobby (6);
Missouri Botanical Garden (26);
Plants Database, United States Department of Agriculture (42);
Concord Public Works (83)