Perennial herb, geophyte, 0.50-1.35 m high, robust; corm whitish, 15-30 mm in diam. Leaves linear, acute; radical leaves 300-900 x 2.5-6.0 mm; reduced sheathing leaves 3 or 4. Flowering stems 0.40-1.35 m high. Inflorescence a raceme of spikes, with 4-8 lax branches. Bracts flecked, 10-25 x 5-8 mm, lanceolate to oblong-ovate, ± acuminate, margins white. Perianth lilac, pink or whitish, 16-34 mm long; tube 5-9 mm long; tepals 10-25 x 4.5-11.0 mm. Anthers 5-8 mm long. Flowering time July-Apr.