Physocarpus alternans (M.E. Jones) J.T. Howell
Annotated by Allyson Davis, 5 Sep 1997.

Idaho: Franklin County: Caribou National Forest, north of Preston of Highway 36, turn east at the junction of Highways 36 and 34, turn east at Mink Creek and follow Birch Creek Road approximately 2 miles. Elev. 5600 ft.
42° 12.74' N, 111° 40.4' W
Valley bottom between the dirt road and Birch Creek. Overstory composed mostly of Acer grandidentatum and Populus tremuloides. Associated with Prunus virginiana, Smilacina racemosa and Symphoricarpus oreophilus. Phenology: Flowers.

Allyson Davis 167, 5 September 1997
With Don Blair
IDS, Accession: 1998.17, Barcode: IDS0011069