Nghe An Prov., Ky Son Distr., Na Ngoi Municipality, eastern slopes of Phu Xai Lai Leng mountain system. Primary broad-leaved and mixed forest (with Cunninghamia) on very steep mountain slopes on granite at elevation about 1900 m a.s.l. around point 19°13’37.5’’N 104°06’11.8’’E. Clustering epiphyte on mossy tree.
20 October 2013 CPC 6025a1
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, L.M.Tuan
Fl. and coll. 16 Apr. 2014. Flowers odorless, uniform yellow. Photos. Averyanov L.