南湖雙葉蘭

Plants ca. 20 cm tall. Stems erect, pale green or nearly white, 6-10 cm long below leaves. Leaves broadly ovate, 1.8-2 cm long, 1.5-2.5 cm wide, apex acute, base truncate, thickly membranaceous, glabrous on both surfaces. Raceme 2-6 cm long, 5-8-flowered, peduncle and rachis puberulous, peduncle with few bract-like scales; bracts ovate-triangular, 3-4.5 mm long, 2-2.2 mm wide; pedicel and ovary nearly straight, 7-9 mm long, glabrous or pedicel slightly puberulous. Flowers spreading; sepals membranaceous, glabrous, 1-nerved, dorsal one oblong or ligulate, 2.5-3.5 mm long, 1-1.3 mm wide, acute or obtuse, lateral ones ovate-falcate, 3-5 mm long, 1.3-2 mm wide, oblique; petals linear-lanceolate, 2.5-4 mm long, ca. 0.6 mm wide, acute or obtuse, 1-nerved; lip erect-spreading, elongate-cuneate, 7-12 mm long, 2.5-4 mm wide, glabrous on both surface, with 2 lobes near apex, lobes ovate or nearly rectangular, 2-4 mm long, 1-1.5 mm wide at base, with acute or truncate-rounded, entire or incised apex, disc with more or less fleshy but not elevated midrib, depressed near base forming nectary surrounded by low short ridges; column nearly straight, 2.5-3 mm long, with dilated down-curved top and distinct stalk; anther ovoid, 0.5 mm long; pollinia 0.8 mm long; stigma semiorbicular; rostellum protruding, truncate at apex.

NANTOU: Shiukduranshan, Chen 327. HUALIEN: North Hohuanshan, Hu 244; Su & Hu 9604. ILAN: Nanhutashan, Su 7387, 7389.

Endemic. Coniferous forests, 2,650-3,200 m, in the central range.