While the location is generally given as "Travelers' Rest," Bessey's locoweed was likely collected from one or two locations, along the Clark Fork of the Blackfoot River, and the west bank of the Bitterroot River, both in Missoula Co., Montana.
An image of the specimen in the Lewis and Clark herbarium. . . .
Oxytropis besseyi (PH-LC 151).
The copyright for this image is retained by the Academy of Natural Sciences of Philadelphia; this image is used with their permission.