Vientiane Prov., Vang Vieng Distr., Nathong village, about 5 km to the W of Vang Vieng town around point 18°55′34.2”N 102°22′58.4”E.
Dry broad-leaved secondary evergreen forest on very steep rocky slopes and on vertical cliffs of remnant highly eroded rocky limestone mountains composed by solid crystalline limestone at elevation about 300 m.
Scandent shrub of semi-woody vine to 6 m long. Flowers white. Occasional.