Ha Giang prov., Quan Ba distr., Tung Vai commune, Thang village, around point 23º03ʹ13.4ʺN 104º51ʹ48.8ʺE, steep rocky slopes of stream valley composed with eroded stratified highly eroded limestone at elevation 1000-1200 m a.s.l. Primary evergreen broad-leaved very humid forest. Terrestrial and lithophyte tuberiferous herb in wet mossy place. Rare. 23 April 2018, L. Averyanov, Nguyen Sinh Khang, Nguyen Tien Hiep, Nguyen Quang Hieu, Chuong Quang Ngan, T. Maisak, VR 712b. Flowered in 23 March 2020, tepals light brown-pinkish, lip white with purple ape[ and white median kallus, column and anther white. Photos, L. Averyanov VR 712b.1 (LE 01073037).