Orchidaceae.

Appendicula torta Blume.

Vientiane Prov., Vang Vieng Distr., Phol Xai village, about 8 km to the W of Vang Vieng town, Phar Poon Mt., around point 18°56'11.5"N 102°20'05.0"E. Dry broad-leaved primary and 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 300-900 m. Epiphyte on tall trees near mountain tops at elevation 800-900 m. Not common. LA-VN 474 15 March 2013. Coll.: N.T.Hiep, L.Averyanov, N.S.Khang, P.V.The, S.Lorphengsy