滇越金线兰 dian yue jin xian lan

Plants 12-18 cm tall. Stem ascending or erect, 2.5-3 mm in diam., 4- or 5-leaved. Leaves abaxially pale green, adaxially blackish green with golden-red venation, ovate, oblique, 2-5 × 1.5-3.5 cm, apex acute; petiole-like base and tubular sheath 0.8-1.6 cm. Peduncle 8-11 cm, with 2 or 3 pale red sheathing sterile bracts; rachis 2-5 cm, 2-7-flowered; floral bracts pale red, ovate-lanceolate, 6-10 mm, shorter than ovary, outer surface pubescent, apex acuminate. Flowers erect, not resupinate, white; ovary and pedicel narrowly cylindric, not twisted, 10-13 mm, pubescent. Sepals pubescent on outer surface, 1-veined; dorsal sepal ovate, cymbiform, ca. 6 × 3.5 mm, apex acuminate; lateral sepals ovate-oblong, ca. 6 × 3 mm, apex obtuse. Petals ovate, strongly oblique, falcate, ca. 6 × 3 mm, 1-veined, apex caudate and incurved; lip white, Y-shaped, 10-12 mm; hypochile short; mesochile 5-6 × ca. 3 mm; flanges oblong, pectinate, divided into 3 or 4 narrow teeth; epichile longitudinally dilated, 2-lobed; lobes diverging widely, obovate, 8-9 × 6-7 mm, margin crenulate, apex truncate; spur conic, 4-5 mm, apex obtuse, containing 2 calli. Column short, with 2 broad lamellate wings. Fl. Jul-Aug.

Shaded humid places in dense forests; 1300-1400 m. SE Yunnan [N Vietnam].