无毛对叶兰 wu mao dui ye lan

Listera suzukii Masamune, Trop. Hort. 3: 42. 1933; L. deltoidea Fukuyama; L. uraiensis S. S. Ying; Neottia deltoidea (Fukuyama) Szlachetko; N. uraiensis (S. S. Ying) Szlachetko.

Plants autotrophic, 8-30 cm tall. Rhizome with very few elongate, filiform roots. Stem ridged, 3.5-12 cm, with a sheath near base. Leaves 2, opposite, borne at or below middle of plant, sessile, ovate to deltoid, 2-4 × 1-3 cm, base truncate-rounded, apex acute. Peduncle green or purple, 2.5-10 cm, pubescent; rachis 2.5-9 cm, glabrous, laxly 10- to more than 20-flowered; floral bracts ovate-triangular, 1-2 × 1-1.5 mm, apex acute. Flowers resupinate, pale greenish brown; pedicel and ovary 5-6 mm, glabrous; sepals and petals not spreading. Dorsal sepal ovate, ca. 2.5 × 1.5 mm, 1-veined, apex acute; lateral sepals rhombic to broadly ovate, oblique, ca. 2.5 × 2 mm, apex acute. Petals oblong-ovate, falcate, ca. 2 × 0.8 mm, 1-veined, apex acute; lip narrowly cuneate or obovate-cuneate, 4-8 × 1.5-2 mm, apex deeply 2-lobed; lobes divergent, narrowly linear, 2.5-4 × ca. 0.5 mm, apices acuminate; sinus with a short tooth between lobes; disk with a thickened midvein. Column ca. 1 mm; rostellum spreading forward, ovate, very large. Fl. Jan-Apr.

● Forests; 800-2200 m. NE and S Taiwan.