Perennial herb. Stems single or several, short. Leaves erect, somewhat falcate, rigid, 150-280 x 4-12 mm, V-shaped in cross section, shallowly keeled. Inflorescence overtopping leaves, 0.25-0.65 m high, with cylindric, dense raceme. Flowers brownish and erect in bud, dull yellow to brownish and erect to spreading when mature, 4-5 mm long. Flowering time Nov.-Jan.