Delphinium glaucescens Rydb. × Delphinium occidentale S. Watson ?
Annotated by Ben Legler, 1 Apr 2015. Remarks: Intermediate in morphology.

Idaho: Lemhi County: Lemhi Pass Road, 3 miles east of Tendoy.
44.959424° N, 113.582494° W,
Datum: WGS 84. Uncertainty: 1000 meters. Coordinate Source: GeoLocate.
On basaltic talus bu rooted in fairly rich soil, across the road beside a stream. In some restects the plants in this collection resemble D. glaucescnes, more typical D. occidentale was growing across the road beside a stream. Phenology: Flowers.

D. Sutherland 1052, Jul 7, 1965
WTU, Accession: 233261, Barcode: WTU-V-007559