Vientiane Prov., Vang Vieng Distr., Nam Pe village, about 12 km to the W of Vang Vieng town, around point 18°58′41.0”N 102°18′54.1”E.
Dry broad-leaved primary and secondary evergreen and semideciduous forest on very steep rocky slopes and on vertical cliffs of remnant highly eroded rocky limestone mountains composed by solid crystalline limestone at elevation 500-1000 m.
Scandent shrub or woody vine 5 m long on steep rocky slope near mountain top. Common.