Rhizomes are stout, about 65438±0cm in diameter, and extend obliquely; Leaf length 15~50cm, width 1.5~3.5cm, blue-purple flowers, and diameter of about10 cm; . Capsule oval or obovate, 4.5 ~ 6 cm long and 2 ~ 2.5 cm in diameter. Native to central China and Japan, mainly distributed in south-central China. Ornamental flowers with elegant fragrance can be used to make perfume, and their roots can be used as medicine, which can be collected all year round and has anti-inflammatory effect.

morphological character

The base of the plant is surrounded by membranous leaf sheaths and fibers left by old leaves. Rhizomes are stout and forked, with a diameter of about 65438±0cm, extending obliquely; The fibrous roots are thin and short. Basal leaves are yellow-green, slightly curved, slightly wider in the middle, sword-shaped, long 15~50cm, wide 1.5~3.5cm, tapering or short at the top, sheath-like at the base, with several inconspicuous longitudinal veins. The flower stems are smooth, 20~40cm high, with 1~2 short lateral branches at the top and 1~2 cauline leaves at the middle and lower parts. 2~3 bracts, green, grasslike, with membranous edges, pale in color, lanceolate or oblong, 5 ~ 7.5 cm long and 2 ~ 2.5 cm wide, tapering at the top or long, containing 1~2 flowers.