Penstemon davidsonii Greene × Penstemon rupicola (Piper) HowellWashington: Okanogan County: Summit, Bunker Hill. Chelan National Forest. Elev. 7200 feet
48.97389° N, 120.48194° W; T40N R19E
Coordinate Source: Estimated.
Dry sandy soil around base of spruce & juniper, and in rock crevices. Additional species included on specimen: Annotated by F.W.P. in 1937 and identified as P. n. thompsonii P.& K.
Oliver T. Edwards 65, Aug 9, 1935
WS, Accession: 68188