南川对叶兰 nan chuan dui ye lan

Listera nanchuanica S. C. Chen, Kew Bull. 35: 761. 1981.

Plants autotrophic, 25-30 cm tall. Rhizome with a few elongate, filiform roots. Stem slender, with 1 or 2 sheaths near base. Leaves 2, opposite, borne below middle of plant, subsessile, broadly ovate or broadly ovate-cordate, 3.2-6 × 3-6 cm, base broadly cuneate or nearly shallowly cordate, apex obtuse or acute. Peduncle 6-10 cm, pubescent, with 3 sterile bracts 4-6 mm; rachis 8-13 cm, pubescent, laxly 10-19-flowered; floral bracts ovate-lanceolate, 3.5-4.5 mm, apex acuminate. Flowers spreading horizontally, resupinate, pale green; pedicel 5-9 mm, pubescent; ovary narrowly elliptic, 2.5-4 mm, glabrous; sepals and petals reflexed. Dorsal sepal oblong or narrowly elliptic, 2.8-3 × ca. 1 mm, 1-veined, apex obtuse; lateral sepals ovate-oblong, oblique, ca. 3 × 1.5 mm. Petals sublinear or narrowly oblong, ca. 2.6 × 0.8 mm, 1-veined; lip subobovate, 7-9 × 3.5-6.5 mm, narrowing at base into a claw, apex deeply 2-lobed; lobes parallel or slightly incurved and overlapping toward apex, subobovate-oblong, 2.5-3 × 1.5-2.2 mm, margins ciliate, apices obtuse; sinus with a short tooth between lobes; claw 0.7-1.3 mm wide, with a pair of subovate or subsquare auricles ca. 0.5 mm near base. Column suberect, ca. 2 mm; anther inclined toward rostellum; rostellum broadly ovate, large, nearly as long as anther but wider. Fl. Jul.

● Forests or forest margins; 2000-2100 m. Chongqing.