长唇对叶兰 chang chun dui ye lan

Replaced synonym: Listera macrantha Fukuyama, Rep. (Annual) Taihoku Bot. Gard. 3: 86. 1933; Neottia macrantha (Fukuyama) Szlachetko, Fragm (1995), not Neottia macrantha Sweet, Hort. Brit., ed. 2, 485. 1830.

Plants autotrophic, 10-20 cm tall. Rhizome with a few elongate, filiform roots. Stem ridged, with 1 or 2 sheaths toward base, 7-14 cm to height of leaves. Leaves 2, opposite, sessile, broadly ovate or ovate-suborbicular, 1-2 × 1.2-2.5 cm, base subcordate, apex truncate-rounded and sometimes mucronate. Peduncle 3-5 cm, pubescent; rachis 2-5 cm, pubescent, laxly 2-6-flowered; floral bracts ovate-cuspidate, 2-5 × 2-4 mm, 1-veined, apex acuminate. Flowers resupinate, yellowish green; pedicel and ovary 8-9.5 mm; sepals and petals spreading. Dorsal sepal narrowly ovate-lanceolate, 4-5.5 × 1-2 mm, 1-veined, base slightly contracted, apex acute; lateral sepals ovate-lanceolate, falcate, 4-5.5 × 1.8-2.8 mm, 1-veined. Petals linear, 3-4.5 × 0.7-1 mm, 1-veined, apex acute; lip spreading forward, cuneate, 11-20 × 5.5-8.5 mm, apex truncate and deeply 2-lobed; lobes slightly divergent, ovate-oblong, ca. 6 × 2.5-4 mm, apices rounded; disk with a longitudinal groove and a nectary near base. Column green, distinctly arcuate above middle, 4-5 mm; anther erect, ovoid-lanceolate, ca. 0.9 mm. Fl. Jun-Aug.

● Forests; 2200-3300 m. Taiwan.