Leaves 15--30 × 0.5--2 cm, glabrous, margin usually scabrid. Scape 40--80 cm, minutely pubescent. Raceme 20--40 cm at anthesis, usually densely many flowered; bracts narrowly ovate, 0.7--1.2 cm, membranous, midvein brown, margin densely long ciliate, apex obtuse to long filiform acuminate. Pedicels suberect, subappressed to rachis, 0.6--1.2 cm, stout. Perianth ± tubular; segments pale purple, linear-oblong, ca. 1 × 0.2--0.3 cm, with 1 green stripe overlaid by 3 brown veins, scarcely or not involute after anthesis, persistent and reflexed in fruit. Stamens slightly exserted from perianth by ca. 2 mm. Capsule subglobose, 0.7--1 cm in diam., smooth; valves rather thin and soft. Seeds brown, 5--6 × 3--3.5 mm including ca. 1 mm wings along angles. Fl. May, fr. May--Jun. 2 n = 14.