Alnus incana (L.) Moench var. rugosa (Dippel) C.L. Hitchc.
Annotated by N. D. Atwood, Dec 2002.

Idaho: Butte County: Foothills of Pioneer Mountains, in Craters of the Moon National Monument, ca. 21.5 air-miles northeast of Carey. Elev. 2118 m.
43.490°, -113.600°
Dry sagebrush grass hillside, S aspect and nearby seep. Riparian corridor thicket. With Herocleum and Veratrum. Sagebrush-bunchgrass with occasional aspen or Douglas-fir stands.

S. Popovich s.n., 19 Aug 2002
With G. Frick
NY, Barcode: 00813468