Rhizomes long, slender. Roots slender. Leaves yellowish green, narrowly linear, 5--27 cm × 1--7 mm at anthesis, 40--55 cm × 7--8 mm in fruit, veins 1 or 2. Flowering stems 5--28 cm, 1- or 2-leaved; spathes 2, green, narrowly lanceolate, 3.5--5.5 cm × ca. 6 mm, 1-flowered. Flowers pale violet, 3.5--5 cm in diam.; pedicel 6--10 mm. Perianth tube 2.5--3(--5) cm; outer segments obovate, with central, horseshoe-shaped, mottled pattern, ca. 2.5 × 1--1.2 cm, crest borne on midvein, yellow, low; inner segments erect, narrowly oblanceolate, 2.2--2.5 cm × ca. 7 mm. Stamens white, ca. 1 cm. Ovary green, 4--5 mm. Style branches pale violet, ca. 1.8 cm × 4 mm. Capsule globose, 1.2--1.5 cm in diam., apex shortly beaked. Fl. Mar--Apr, fr. May--Jul.

* Forests, forest margins, open groves, hillsides, grasslands, open fields, roadsides. Anhui, Henan, Hubei, Hunan, Jiangsu, Zhejiang.