Stems stout, 1 m or more long, 1-2 cm in diam., rooting near base, roots thick and rigid. Leaves linear, 25-30 cm long, 4-5 cm wide, thick coriaceous, yellowish green, apex rounded and slightly oblique, base decurrent into sheath; sheaths tube like, embracing stem, 3 cm long. Racemes lateral from upper part of stem, subcorymbose; bracts scale-like, 3-4 mm long, 5-6 mm wide; pedicel and ovary 11-13 mm long. Flowers pale yellow with red transverse stripes, ca. 1.8 cm in diam.; dorsal sepals oblanceolate, 13-15 mm long, 7-8 mm wide, apex rounded; lateral sepals obovate, slightly oblique, 13-15 mm long, 7- 9 mm wide, obscurely keeled outside; petals oblanceolate falcate, 12-13 mm long, 4-5 mm wide, apex obtuse, base contracted; lip fleshy, whitish above, yellowish below, 1 cm long, base saccate, blade 3- lobed, lateral lobes erect, broadly triangular, midlobe ovate or oblong, recurved at apex, thickened atbase, disc pubescent, sac shallowly conic, pubescent inside; column 2 mm high; anther cap semispherical, 2 mm long; pollinia globose, 0.8 mm in diam.; stipe slender viscidium rhombic, 2-fid. Capsules nearly cylindrical, 5-6 cm long.

TAIPEI: Wulai, Lin 283. TAOYUEN: Kueihuei, Su et al. 8827, 9179. TAITUNG: Tawu, Su 188; Su 906*.

Southern China, eastern Himalaya, northern Assam, Thailand, Indochina, Sri Lanka and Malaysia. Taiwan, on exposed rocks and precipices along rivers at low elevations.