FLORA OF VIETNAM
Orchidaceae
Nervilia mackinnonii (Duthie) Schltr.

Ha Giang prov., Quan Ba distr., Bat Dai Son commune, Bat Dai Son Nature Reserve, San Chu village, around point 23°08ʹ55.1ʺN 104°59ʹ45.7ʺE, 1000-1200 m a.s.l., karstic, highly eroded mountains composed of solid marble-like limestone, primary and partially degraded evergreen broad-leaved humid forest on rocky mountain slopes. Terrestrial herb in shady place (HN, LEafless when flower). Sepals and petals dull olive with nerves darker. Lip white with fine purple-violet punctuation. Occasional. 13 April 2018, L. Averyanov, Nguyen Sinh Khang, Chuong Quang Ngan, T. Maisak, VR 061 (HN, LE01048917).