Smithsonian National Museum of Natural History  
Lewis and Clark as Naturalists
<EM>Prunus virginiana </EM>L. - collected by R.S. Williams 392, Great Falls (flowers) and Columbia Falls (fruit), 10 June (flowers) & 6 September (fruit) 1892

collected by R.S. Williams 392, Great Falls (flowers) and Columbia Falls (fruit), 10 June (flowers) & 6 September (fruit) 1892
(from the United States National Herbarium US-288493)
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