Penstemon salmonensis N.H. Holmgren
Annotated by Noel H. Holmgren, 2015. Sources: FPNW, Intermountain Flora. Remarks: Isotype specimen identified and named by Noel H. Holmgren

Idaho: Custer County: Salmon River Mountains, Morgan Creek, along the road just north of Block Creek and 12 km (7.4 mi) road distance from U.S. Highway 93. Elev. 1745 m.
44.6925° N, 114.260833° W; T16N R19E S30 (ne1/4)
Coordinate Source: Specimen Label.
In cracks and crevices of rock cliff with Heuchera cylindrica. Corolla lobes blue-purple, the rim of the palate pale violet, the throat pale violet within with reddish violet lines, the outside violet. Phenology: Flowers. Isotype: Penstemon salmonensis N.H. Holmgren. Published 2017. Brittonia, DOI 10.1007/s1228-017-9498-9
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Noel H. Holmgren 16599, Jun 21, 2015
With Patricia K. Holmgren
IDS, Accession: 2018.002, Barcode: IDS0071749