Capitate Sandwort
Arenaria congesta Nutt. var. congesta
It is a perennial herb with firm, somewhat stiff stems and pointed leaves. The leaves are without a stalk, with their basis clasping. It has a tuft of sharp pointed, grass-like leaves at the base and only 2 to 4 pairs of shorter leaves. The white flowers are in dense heads. Found in rocky soil under dry conditions in slope habitats including sagebrush scrub, Yellow Pine, Red Fir, Lodgepole Forests, and Pinyon-Juniper Woodland. It grows in several areas in Idaho.