Rhizomatous herbs of moderate size, 3-10 dm. tall; leaves narrowly ensiform, chiefly basal, but also reduced and rather sparse upward on the flowering stem, 5-45 cm. long, 0.5-1.2 cm. broad; flowering stem paniculately branched and rather sparsely leafy, bearing virtually sessile clusters of few to several flowers in the axils of reduced leaves; spathes 1.0-1.5 cm. long, subequal; perianth bright blue, about 1.5-2.0 cm. long; capsules oblong-clavate, 1.0-1.5 cm. long, nearly enclosed by the spathes.