叉唇对叶兰 cha chun dui ye lan

Listera divaricata Panigrahi & P. Taylor, Kew Bull. 30: 559. 1975.

Plants autotrophic, 15-24 cm tall. Stem slender, with 2 or 3 tubular sheaths near base. Leaves 2, opposite, borne at ca. middle of plant, subsessile, broadly ovate-cordate, 2-3 × 1.7-3.1 cm, base shallowly cordate to subtruncate, apex subacute. Peduncle 3-8 cm, pubescent, with 2-5 sterile bracts 4-5 mm; rachis 3-7 cm, pubescent, densely 8-14-flowered; floral bracts linear-lanceolate, 6-8 mm, 1-veined, apex acute. Flowers erect, resupinate, pale yellow or pale green; pedicel 2.5-4 mm, slender, glabrous; ovary fusiform, 1.8-3 mm, glabrous; sepals and petals spreading. Dorsal sepal oblong-lanceolate, ca. 2.2 × 0.9 mm, 1-veined, apex obtuse; lateral sepals oblong-lanceolate, oblique, ca. 3.5 × 1.5 mm, apex acute. Petals slightly incurved, linear-lanceolate, ca. 2.8 × 1 mm, 1-veined, apex obtuse; lip erect or spreading forward, obovate-flabellate, 3-4 × ca. 8 mm, with a pair of triangular auricles near base, apex deeply 2-lobed; lobes diverging widely, oblong or oblong-lanceolate, ca. 5 × 2 mm, 3- or 4-veined, apices obtuse; sinus with a tooth between lobes. Column suberect, 1.5-2 mm; anther inclined toward rostellum; rostellum ascending, ovate, slightly shorter than anther. Fl. Jul-Aug.

Tsuga forests; 3000-3500 m. SE Xizang [NE India].