尾尖石仙桃 wei jian shi xian tao

Rhizome subcylindric, 2.5-3.5 mm in diam., slender, usually with long internodes, apex producing a pseudobulb and with a new rhizome at its base. Pseudobulbs borne 2-4 cm apart from each other, subcylindric, 1.7-4.5 cm × 2.5-5 mm, attenuate toward apex, ± curved, apex 2-leaved. Leaf blade narrowly elliptic-lanceolate, 7.3-12.5 × 1.3-2.3 cm, papery, base broadly cuneate, apex acuminate or nearly caudate; petiole 3-12 cm. Inflorescence arising from rhizome near base of last pseudobulb, 1.5-3 cm; rachis 3-7-flowered; floral bracts persistent at least at end of flowering, broadly ovate, ca. 3 mm. Flowers pale yellow, small; pedicel and ovary 5-7 mm. Sepals ovate-oblong, ca. 4 × 2.5 mm, 3-veined; lateral sepals slightly oblique. Petals narrowly obovate, ca. 3 × 1.8 mm; lip subovate-oblong in outline, ca. 4 × 3 mm, shallowly cupular at base, slightly 3-lobed, apex emarginate, without appendages inside. Column ca. 3.5 mm, both sides winged; wings widened toward column apex; rostellum ca. 1.3 mm wide. Capsule obovoid-ellipsoid, ca. 1 cm × 6 mm, 3-ridged; fruiting pedicel 4-5 mm. Fl. Oct. 2n = 40.

Epiphytic on trees in broad-leaved evergreen forests or on cliffs along valleys; 1800-2700 m. SE Xizang, NW Yunnan [Bhutan, NE India, Myanmar, Nepal].