阔唇羊耳蒜 kuo chun yang er suan

Herbs, epiphytic or lithophytic, rather tall and large. Pseudobulbs densely arranged, narrowly ovoid or narrowly ovoid-cylindric, 2-2.5 cm × 7-10 mm. Leaves 2; petiole (2.5-)4-11 cm, articulate; blade oblanceolate or linear-oblanceolate, 13-29 × 1.3-3 cm, papery, apex acuminate. Inflorescence 20-35 cm; peduncle often ± narrowly winged, with a sterile bract; rachis 10- to many flowered; floral bracts narrowly lanceolate, 5-8 mm. Flowers yellowish green or yellow tinged with brown; pedicel and ovary 6-8 mm. Sepals oblong, ca. 7 × 2 mm, veins inconspicuous, apex obtuse. Petals narrowly linear or subfiliform, ca. 7 × 0.5 mm, apex obtuse; lip oblate or subreniform, 6-7 × 8-10 mm, adaxially with glandular hairs, with 2 small calli near base, middle part with a thick longitudinal lamella ca. 2 mm, margin irregularly toothed, apex rounded. Column suberect or slightly arcuate, 2-2.5 mm, nearly wingless. Capsule obovoid-ellipsoid, 6-7 × 4-5 mm; fruiting pedicel 3-5(-8) mm. Fl. Nov-Feb, fr. Sep-Oct.

On trees in forests, rocks along valleys; 1200-1800 m. C and SE Yunnan [N Vietnam].