高山无叶兰 gao shan wu ye lan

Plants 75-100 cm tall. Rhizome elongate, covered in scales. Stem erect, with many membranous sheaths 1-4 cm. Inflorescence with 10-20 widely spaced flowers; rachis 19-22 cm; floral bracts reflexed, linear to linear-lanceolate, 25-30 × 3-4 mm, conspicuously longer than pedicel and ovary. Flowers spreading ± horizontally, yellowish green; pedicel and ovary puberulent, 2-3 cm, stout. Sepals ovate-lanceolate, slightly cymbiform, 18-23 × 6-7 mm, apex acuminate-caudate. Petals 14-17 × 5-7 mm; lip 14-17 mm, contracted at or above middle into epichile and hypochile; hypochile winged, basal margins forming a small sac; epichile ovate, margin often involute, apex acute. Column slightly arcuate, 1-1.3 cm. Capsule elliptic, ca. 3 × 1 cm. Fl. Jul, fr. Sep.

Forests, riverbanks; 2100-2600 m. SE Xizang [India, Nepal].