圆唇对叶兰 yuan chun dui ye lan

Listera oblata S. C. Chen, Kew Bull. 35: 759. 1981.

Plants autotrophic, ca. 23 cm tall. Rhizome with several clustered roots. Stem with 1 sheath toward base. Leaves 2, opposite, borne at ca. middle of plant, subcordate, ca. 2.8 × 3-3.5 cm, base slightly cordate, apex subacute; bractlike leaflets ovate-lanceolate, 5-6 mm, turning into floral bracts farther up stem. Peduncle pubescent, with 3 sterile bracts 5-6 mm; rachis ca. 6.5 cm, pubescent, laxly 7-flowered; floral bracts ovate-lanceolate, ca. 5 mm. Flowers large, resupinate; pedicel ca. 4 mm, pubescent; ovary clavate, ca. 4 mm, almost glabrous; sepals and petals spreading widely. Dorsal sepal narrowly elliptic, ca. 5 × 2 mm, 1-veined, apex obtuse; lateral sepals elliptic-lanceolate, oblique, ca. 6.5 × 2.5 mm, apex subacuminate. Petals linear, nearly as long as lateral sepals, ca. 0.7 mm wide; lip suborbicular or oblate, ca. 13 × 12 mm, base abruptly contracted into a claw ca. 2 × 1.5 mm, margin minutely papillose-ciliate, apex deeply 2-lobed; lobes parallel but somewhat overlapping toward apex, broadly ovate, ca. 4.5 × 6 mm, apices rounded; disk with midvein thickened and deep brown. Column slightly arcuate, ca. 5.5 mm; rostellum protruding, large. Fl. unknown.

● Chongqing.