Penstemon triphyllus Douglas ex Lindl. var. infernalis N. H. Holmgren
Annotated by Noel H. Holmgren, 25 Apr 2017. Remarks: New variety

Idaho: Adams County: Hell's Canyon, Snake River.
45.37127° N, 116.638199° W,
Datum: WGS 84. Uncertainty: 2780 meters. Coordinate Source: Digital Map. Invalid coordinates (located outside county bounds).
Cracks in cliffs. Phenology: Flowers.

Ray J. Davis 2505, Jul 2, 1940
IDS, Accession: 1999.001, Catalog: 1999.1.1776, Barcode: IDS0041767