Description from Flora of China
Plants to 22 cm tall. Rhizome somewhat thickened; roots often with small tuberlike nodules. Stem erect, unbranched, nodes with tubular sheaths; internodes 2-3 cm. Leaves 2, alternate, well spaced along stem, petiolate, ovate or elliptic, 7-10 × 3-4 cm, papery, base subrounded, apex acuminate. Inflorescence terminal, 13-flowered, ca. 5 cm; floral bracts ovate-lanceolate, ca. 3 mm. Flowers not resupinate, green, small; pedicel and ovary ca. 1.2 cm. Dorsal sepal oblong, concave, ca. 5.5 × 1.8 mm, 3-veined, apex obtuse; lateral sepals almost completely connate and forming a synsepal; synsepal obovate-lanceolate, ca. 6 × 2.3 mm, apex subtruncate. Petals elliptic, concave, ca. 5 × 1.6 mm, apex obtuse; lip obovate, ca. 3 × 2 mm, adaxially with 1 thick longitudinal ridge, base spurless. Column ca. 2 mm; anther erect, cordate; caudicle inconspicuous; rostellum erect, apex 2-lobed. Fl. Jul.
● Forests; 1100-1200 m. SW Sichuan.