Asclepias capricornu Woodson var. decumbens (Nutt.) Gray.

Idaho: Franklin County: On hillsides in canyon, Cub River, southeast of Preston.
42.063313° N, 111.771812° W,
Datum: WGS 84. Uncertainty: 2283 meters. Coordinate Source: Digital Map.
Raw hillsides. Phenology: Flowers.

J. H. Christ 9835, Sep 14, 1938
ID, Accession: 21046, Barcode: ID107092