Stems less than 1.5 mm wide, margins entire. Spathes: keels entire, outer at least 2 times inner, basally connate 2.6-7 mm. Outer tepals 18-20 mm; filaments purple. 2n = 64. Flowering late spring--summer. Moist, open, grassy areas; 0--250 m; B.C.; Wash. Var. macounii is especially common in the San Juan Islands.