Leaves closely appressed to prom-inently arcuate; blade 7-11 mm, apex acute to acuminate, navic-ular, with small mucro, not spine-tipped. Flowers: sepals promi-nently 1(-3)-veined, lance-olate to narrowly so (herbaceous portion lanceolate to narrowly so), 3.5-5.5(-7) mm, apex acuminate; petals 0.5-1.2 times as long as sepals. 2n = 36. Flowering spring-summer. Sandy and rocky slopes and ridges, chaparral, open pine woodlands, alpine slopes; 600-3800 m; Alta., B.C.; Colo., Idaho, Mont., Oreg., Utah, Wash., Wyo.