Quang Binh Prov., Minh Hoa Distr., Hoa Son municipality, B’Lam Lang limestone mt., around point 17°42’13.7”N 105°47’33.9”E. Primary selectedly logged closed evergreen broad-leaved forest on top ridge of mountain at elevation about 700 m a.s.l. Semi-epiphyte. Flowers greenish-yellowish. Occasional.