关山对叶兰 guan shan dui ye lan

Listera kuanshanensis H. J. Su, J. Exp. Forest Natl. Taiwan Univ. 13: 206. 1999.

Plants autotrophic, 12-14 cm tall. Rhizome with a few elongate, filiform roots. Stem 5-7 cm, slender. Leaves 2, opposite, borne at ca. middle of plant, subsessile, deltoid or ovate-suborbicular, ca. 1.5 × 1.8-2 cm, membranous, base broadly truncate, apex acute. Peduncle pubescent, with 2 sterile bracts; rachis 3-4 cm, pubescent, laxly 3-7-flowered; floral bracts ovate-lanceolate, ca. 3.5 mm, apex acute. Flowers resupinate, greenish; pedicel and ovary ca. 8 mm, glabrous; sepals and petals spreading widely. Dorsal sepal ovate-lanceolate, ca. 3.3 × 1 mm, base slightly contracted, apex acute; lateral sepals falcate, ca. 3.5 × 1.2 mm, base broadly cuneate, apex acute. Petals linear-lanceolate, ca. 3.3 × 0.5 mm, apex obtuse; lip lanceolate, ca. 14 × 2.5 mm, apex deeply 2-lobed; lobes divergent, linear, 6.5-7 × 0.5-0.6 mm, apices acuminate; disk with a longitudinal keel. Column arcuate toward apex, 2.5-3 mm; rostellum ca. 0.9 mm. Fl. Aug.

● Forests; 2600-2700 m. S Taiwan.