? Asclepias brachystephana Engelm. ex Torr.
Remarks: [Species name on label says Asclepias brachystephana]

Montana: Yellowstone County: Allard Ranch 1.5 miles West of Laurel,. Elev. 2700 ft.
45.669166° N, 108.801911° W,
Datum: WGS 84. Uncertainty: 4085 meters. Coordinate Source: Digital Map.
Slope: level. Soil: deep clay. loam.Type: open cultivated meadow. Principal associated plants: ragweed. Use: none. Distribution: in groups. Phenology: Fruits.

J. C. Whitham 229, Aug 26, 1931
MONT, Accession: 19541

Asclepias brachystephana Engelm. ex Torr.
Annotated 1931. Remarks: Identified by MSC

Montana: Yellowstone County: Allard Ranch 1 1/2 mi. W. of Laurel. Elev. 2700 ft.
45.668803° N, 108.821197° W,
Datum: WGS 84. Uncertainty: 3577 meters. Coordinate Source: Digital Map.
Slope: level. Soil: deep clay loam. Type: open cultivated meadow ragweed. Distribution: in groups. Abundance: common. Forage Value: none or little. Phenology: Flowers.

J. C. Whitham 229, Aug 26, 1931
MONT, Accession: 41965