秀丽角盘兰 xiu li jiao pan lan

Monorchis quinqueloba (King & Pantling) O. Schwarz.

Plants 25-29 cm tall. Tubers oblong to subglobose, 15-20 × 5-15 mm. Stem with 2 tubular sheaths at base, 2-leaved. Leaves basal, subopposite, arising from within basal sheaths, linear-lanceolate to linear-oblong, 13-18 × 1.5-2 cm, apex acute or acuminate. Inflorescence 13-20 cm; peduncle narrowly winged, with 1 linear-lanceolate sterile bract to 7 cm; rachis ca. 13 cm, subdensely many flowered; floral bracts lanceolate, 3-8 mm, exceeding ovary, apex acuminate. Flowers erect or horizontal, green; ovary straight, 2-4 mm including pedicel. Dorsal sepal erect, oblong to oblong-elliptic, 1.8-2 × 0.5-0.8 mm, 1-veined, apex obtuse; lateral sepals spreading, oblong, 1.8-2 × 0.8-1 mm, 1-veined, apex subacute. Petals spreading, linear, 1.6-1.8 × ca. 0.3 mm, 1-veined, apex acute or acuminate; lip pendulous, oblong, 5-lobed, ca. 2.2 × 0.6 mm, usually slightly longer than sepals, base shallowly concave; basal lobes triangular, small; lateral lobes triangular, small, apex obtuse; mid-lobe triangular-lanceolate, ca. 0.6 mm, apex acuminate. Column ca. 0.5 mm; anther ca. 0.3 mm; pollinia obovoid; viscidia small, disklike; auricles oblong. Fl. Aug-Sep. 2n = 38.

Evergreen broad-leaved forests; ca. 2200 m. NW Yunnan [Bhutan, India, Nepal].