Rubus pensilvanicus Poir.

Idaho: Idaho County: North bank of Salmon River, mouth of Grouse Creek, 0.2 miles east of Jim Moore Place, 2 air miles southeast of Rabbit Point. Elev. 2361 ft.
45° 29.1' N, 115° 20.57' W
Seen naturalized 3 places in shady thickets over granite, with Amelanchier, Philadelphus, Toxicodendron, Berberis aquifolium, Symphoricarpos, Prunus virginiana, Rubus leucodermis. Arching shrub 1.5 meters tall, fruit black; perhaps introduced in vicinity many decades ago by settlers.¶Specimen used for illustration in Revision of Flora of the Pacific Northwest, WTU Herbarium, 2015. Phenology: Fruits.

Peter F. Zika 26010, Jul 29, 2012
WTU, Accession: 390317, Barcode: WTU-V-021996