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. Terrestrial herb with erect stem to 0.3 m tall in shady place. Very common at elevation 700-800 m. LA-VN 431 15 March 2013
Coll.: N.T.Hiep, L.Averyanov, N.S.Khang, P.V.The, S.Lorphengsy. (Fl. 14 Nov. 2016, LA-VN 431 / garden no 13009. Flowers white, tepal apices violet or lilac, anthers pale light yellowish, inflorescence rachis pinkish. Flowers with strange strong smell like chlorophorm). Flowered 6 Dec. 2017 LA-VN 431 / garden no 13009 Photos L. Averyanov.