Xerophyllum tenax (Pursh) Nutt.
Helonias tenax Pursh
Bear Grass, Indian Basket Grass, Soap Grass, Squaw Grass
Bear grass is a native of western North America. It is not a grass, but a member of the Lily family.
Identification: These plants typically grow in groups, to heights of five feet. Leaves are mostly at the base, olive-colored, with toothed edges, up to 3' (91 cm) long and narrow (⅛-¼" (3.2-6.3 mm)). Leaves are tough and wiry. Tightly bunched cream-colored flowers on tall stalks are distinctive. Often occurs near alpine larch and whitebark pine. Fruits are less than ½" (1.3 cm) long, with three lobes.
Xerophyllum tenax on Montana Plant Life
Xerophyllum tenax on Wikipedia
Xerophyllum tenax on Plants for a Future, a resource and information centre for edible and otherwise useful plants
Xerophyllum tenax on the USDA Forest Service's Fire Effects Information Database
Xerophyllum tenax description by Thomas H. Kent, last updated 12 Oct 2018.