Amelanchier basaltica Piper ?

Idaho: Latah County: South slope of Tomer's Butte, 4 miles southeast of Moscow.
46.691538° N, 116.939429° W,
Datum: WGS 84. Uncertainty: 500 meters. Coordinate Source: GeoLocate.
Thickets on the south slope. Phenology: Flowers.

William H. Baker 7378, May 5, 1951
WTU, Accession: 156501