Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E. Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Epiphyte on mossy trees on rocky mountain top. Not rare. LA-VN 2032 4 April 2017 Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
Flowered in cult. 23 Aug. 2017. Sepals and petals dull green, sometime with purple tint; lip dull green with dark purple marks and dark purple side-lobes to entirely dark purple. Photos. L.Averyanov