Luang Prabang prov., Ngoy distr., Don Khun village, near waterfall, around point 20°31'36.9''N 102°35'15.8''E.
Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 450-550 m a.s.l. along mountain stream. Terrestrial herb to 0.5 m tall in shady place. Spathe white to greenish. Common. LA-VN 2000 2 April 2017