垂头万代兰 chui tou wan dai lan

Luisia alpina Lindley, Edwards’s Bot. Reg. 24(Misc.): 56. 1838; Stauropsis alpina (Lindley) Tang & F. T. Wang; Trudelia alpina (Lindley) Garay.

Stems 5-18 cm, 0.5-1 cm in diam. Leaf blade 5-16 × 0.7-1.4 cm, slightly fleshy or thickly leathery, apex unequally 2-lobed. Inflorescences 2 or 3, 1.5-2.5 cm, 1-3-flowered; peduncle 1-2 cm; rachis 0.5-1 cm; floral bracts ovate-triangular, 2-3 × 1.5-2 mm, apex obtuse-acute. Flowers thickly textured, not widely opening, 1.5-2 mm in diam., fragrant; pedicel and ovary yellowish green, 1.2-2 cm; sepals and petals green to yellow-green, not tessellated. Dorsal sepal oblong-ovate, 11-15 × 4-6 mm, base cuneate, apex obtuse; lateral sepals ovate-lanceolate, 12-15 × 4-6 mm, base cuneate, apex obtuse-acute. Petals obliquely oblong-lanceolate, 10-13 × 3-5 mm, base clawed, apex obtuse-acute; lip green with a whitish base, basal sac maroon-purple, apical lamina striped violet, shorter than sepals, fleshy, base concave, spurless, deeply gibbous-saccate; lateral lobes suberect, abaxially yellowish green, adaxially reddish purple, suborbicular, 1.5-2.5 × 3-4 mm, apex rounded; mid-lobe abaxially yellowish green, adaxially reddish purple with yellowish stripes, ligulate-ovate, 9-12 × 6-7 mm, apex retuse or obscurely 3-lobed; disk sometimes with a small, short central ridge and 2 smaller central ridges on either side. Column white, 3-4 mm; anther cap white, nearly subglobose, ca. 3 mm wide. Fl. Jun. 2n = 38.

S Yunnan [Bhutan, India, Nepal, N Vietnam].