Perennial herb. Stems single to several, short. Leaves erect to recurved at about middle, 0.3-0.6 m long, 8-15 mm wide, V-shaped in cross section, margins and keel smooth or scarcely toothed towards apex. Inflorescence overtopping or subequal to leaves, 0.40-0.65 m high, with globose, dense raceme. Flowers flame-red and spreading in bud, yellow to orange-yellow and pendulous when mature, 28-32 mm long. Flowering time Aug.-Oct.