Laos, Vientiane prov., Vang Vieng district, close vicinities of Vang Vien town, Phu Ngeum Mt., secondary degraded evergreen forest on steep rocky slopes and cliffs composed with karstic highly eroded marble-like limestone at elevation at 350-500 m a.s.l. Clustering epiphyte on mossy gnarled trees on mountain top. Very common. AL 200 (1 living plant). 13 December 2015, L.Averyanov, T.Maisak, M.Nuraliev, N.Vislobokov. Flowered in 2 Nov. 2018. Flowers light pale pink. Vandopsis gigantea (Lindl.) Pfitzer Clustering epiphyte with stem and leaves to 1 m long on mossy gnarled tree on mountain top. Rare. AL 201 (1 plant) Luisia zollingeri? Pendulous epiphyte with stem to 0.4 m long on mossy gnarled tree on mountain top. Occasional. AL 202 (3 plants)