Corispermum americanum (Nutt.) Nutt. var. rydbergii Mosyakin
Annotated by S. L. Mosyakin, 1994.

Washington: Whitman County: Snake River at Wawawai.
46.6398° N, 117.3691° W; uncertainty 1 mi.
Uncertainty: 1609 meters.
Sandy river banks. Phenology: Flowering and Fruiting.

Marion Ownbey s.n., Oct 15, 1939
With Ruth P. Ownbey
RM, Accession: 182887