Perennial herb. Stems several, short. Leaves suberect to arcuate, 0.4-0.7 m long, 6-10 mm wide, V-shaped in cross section, margins smooth to minutely and sparsely denticulate. Inflorescence usually overtopping leaves, 0.4-0.6 m high, with globose to subglobose, dense raceme. Flowers red, red-tipped or yellow and erect in bud, yellow to yellow-green and spreading to pendulous when mature, 22-27 mm long. Flowering time Mar.-May.
Rhizomatous perennial, 40-65 cm, forming clumps. Leaves strap-shaped, coarsely fibrotic. Flowers in globose racemes, yellow.