Densely tufted, glabrous herb with much-branched rhizome. Leaves linear, 24-60 cm long, 4-12 mm wide. Scape shorter than leaves, 2-3 mm diam., sometimes with one reduced leaf. Inflorescence divaricate, with numerous rhipidia of 3-6 flowers on pedicels c. 1 cm long. Spathes lanceolate, 1-4 cm long; bracteoles 5-8 mm long. Perianth white. Sepals obovate, 8-13 mm long, 4-7 mm wide. Petals ovate, 6-8 mm long, 1.5-3 mm wide. Filaments connate at base; anthers c. 2 mm long. Ovary obovoid. Capsule globose-trigonous, 5-8 mm diam., black. Seeds angular, c. 1 mm diam., dark brown.
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