A herb. It grows 45-80 cm tall. It has a rhizome that forms tubers. It is 1-2 cm thick. The stems are zigzag shaped. There are 4-9 leaves. These are oblong to sword shaped and 12-21 cm long by 2-6 cm wide. They are loosely hairy underneath. Flowers occur singly in panicle 5-10 cm across. They are white or deep purplish red.