蕊丝羊耳蒜 rui si yang er suan

Leptorkis resupinata (Ridley) Kuntze; Platystyliparis resupinata (Ridley) Margońska.

Herbs, epiphytic. Pseudobulbs densely arranged, subcylindric or ± spindle-shaped, 1.8-5 cm × 3-6 mm, above middle usually with 3 or 4 remote leaves. Leaf blade narrowly oblong or nearly linear-lanceolate, 3-8 × 0.5-1.2 cm, papery, base slightly contracted, articulate, subsessile, margin slightly serrate, apex acuminate. Scape arching or pendant, 7-18 cm, nearly wingless, with several sterile bracts 5-9 mm; raceme 5-14 cm, 10-50-flowered; floral bracts lanceolate, 3-5 mm. Flowers pale green or greenish yellow; pedicel and ovary 5-7 mm. Dorsal sepal oblong or elliptic-oblong, ca. 4 × 1.8 mm, 1-veined, abaxially carinate, apex obtuse or acute; lateral sepals not carinate. Petals narrowly linear, ca. 3.5 × 0.3 mm, apex obtuse; lip broadly elliptic-oblong or broadly ovate-oblong, 2.5-3 mm, both sides strongly contracted and with 2 lateral splits below middle, forming epichile and hypochile, apex obtuse; epichile auriculate and sagittate at base; hypochile with suborbicular lobes on both sides, centrally with 1 bilobed callus. Column erect, ca. 2.8 mm, with 2 suborbicular wings on both sides, each with 1 pendulous filiform appendage. Capsule obovoid-oblong, ca. 5 × 2-3 mm; fruiting pedicel ca. 4 mm. Fl. and fr. Oct-Dec. 2n = 28, 56.

On trees in dense forests or in broad-leaved forests along valleys; 1300-2500 m. SE Xizang, W to SE Yunnan [Bhutan, India, Nepal].