Images of specimens in the Lewis and Clark herbarium. . . .
Prunus virginiana var. melanocarpa (PH-LC 179) "collected May 29, 1806 on the Kooskoosky (Clearwater) River".
Prunus virginiana (PH-LC 180) "collected August 10, 1806 on the Missouri River".
The copyright for these images is retained by the Academy of Natural Sciences of Philadelphia; this image is used with their permission.