Leaves usually narrowly linear, sometimes linear-oblanceolate, 8--40 × 0.3--1 cm, soft, glabrous, margin flat, minutely serrulate, apex gradually long acuminate. Scape 30--85 cm. Raceme usually simple; bracts ovate to linear-lanceolate, 0.3--1.8 cm, apex acuminate. Flowers usually paired, narrowly ellipsoid to cylindric in bud; pedicel 0.5--1 cm, articulate proximally. Tepals white, linear, 1.5--2 × 0.2--0.4 cm, 5-veined. Filaments 0.5--1.2 cm. Anthers 0.8--1.2 cm (including appendages); basal appendages 1--1.5 mm, apex obtuse-rounded. Style 1.4--2 cm. Capsule ellipsoid or obovoid, 0.8--1 × 0.7--0.9 cm. Fl. and fr. Apr--Oct.