Leaves are ovate-oblong, 10-12 cm long and 3-5 cm wide, apex acuminate.
Flowers are yellow, borne on 20-45 cm long inflorescence. There are three bluish violet long glabrous sheaths. Calyx is divided into three parts. Corolla 2 cm long, upper part divided into three parts. Stigma has wings. Stamen is bluish-violet, 2.2 cm long.
Fruit is white or red, smooth, hexagonal, 10-13 mm long and 8-12 mm wide.
The plant is propagated by the division of rhizome. It is used in cough, asthma and rheumatic fever.