Herminium angustilabre King & Pantling J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 65: 131. 1896.

狭唇角盘兰 xia chun jiao pan lan

Monorchis angustilabris (King & Pantling) O. Schwarz.

Plants 7-18 cm tall. Tubers oblong-ellipsoid, 6-15 × 3-7 mm. Stem with 1 or 2 tubular sheaths at base, 1-leaved. Leaf basal or cauline, usually distant from basal sheath, oblong-elliptic, 1.8-2.5 × 0.4-1 cm, apex obtuse. Inflorescence 4-14 cm; peduncle somewhat angled, with 1-5 linear to oblong-lanceolate sterile bracts 0.5-1.5 cm; rachis 3-5 cm, laxly 8-12-flowered; floral bracts lanceolate, 4-6 mm, exceeding flowers, apex acuminate. Flowers horizontal to slightly nodding, green to yellowish green; ovary arcuate, ca. 3.5 mm including pedicel. Dorsal sepal suberect, broadly ovate, concave, 2-2.6 × 1.2-2 mm, 1-veined, apex acute; lateral sepals reflexed, narrowly oblong, slightly oblique, 2.8-3 × ca. 0.7 mm, 1-veined, apex acute. Petals forming a hood to weakly spreading, linear-oblong, slightly oblique, ca. 2.8 × 0.5 mm, 1-veined, apex acute; lip pendulous, linear-oblong, 3-3.5 × ca. 0.7 mm, base slightly dilated and shallowly concave, margin entire, apex acute and reflexed. Column ca. 0.5 mm; pollinia globose; viscidia elliptic; auricles oblong, narrow. Fl. Jul.

Scrub, grassy slopes; ca. 3500 m. NW Yunnan [India (Sikkim)].