Description from Flora of China
Plants with chlorophyll, semi-mycotrophic, flowering when 10-40 cm tall. Stems green, slender. Basal rosette leaves few, linear-lanceolate, 0.5-2 cm × ca. 3 mm. Cauline leaves linear, 0.5-3 × 0.2-0.3 cm. Inflorescences (1 or)2-6(-8)-flowered; bracts lanceolate, 3-6 mm. Flowers pedicellate to subsessile, bluish purple with yellow tepals, 1-1.5 cm. Perianth tube 4.5-13 mm; wings conspicuous, 1.5-3 mm wide; outer tepals ovate-triangular, 1-2 mm, margin double and prominent; inner tepals triangular, 0.5-1 mm, margin double. Stamens sessile; connectives with 2 apical crests and a pendent basal spur. Ovary ellipsoid to obovoid, 3-7 mm. Capsule obovoid. Seeds ellipsoid. Fl. Jun-Oct, fr. Oct-Feb. 2n = ca. 16.
Generally in wet grasslands; sea level to 300(-800) m. Guangdong, Guangxi, Hainan [Bangladesh, Cambodia, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, New Guinea, Thailand, Vietnam; Australia].