Vietnam., Lam Dong prov., Lac Duong distr., Lat municipality, Pang Tien village, around point 11°38?35??N 108?18?44??E. Remnants of primary evergreen, humid montane forest along rocky mountain stream at elev. about 1250 m a.s.l. Creeping epiphytic vine to 15 m long in shady places of rocky river slopes. Not common. Flowers odorless; sepals, petals and lip light, pale yellowish-green; lip inside with bright red nerves, epichile green, papillae, appendages, column and anther white. 1 May 2015 AL 50 Coll.: L.Averyanov, T.Maisak, Nguyen Phi Tam, Nong Van Duy. Fl. in August 2015. Flowers white. L.Averyanov