Saravan Prov., Sa Mouay Distr., to the SEE of Sa Mouay town, elevation from Ta Oy village (700 m elev.) to mountain ridge with highest point at 1350 m around 16°08′47.0”N 106°52′35.4”E.
Primary evergreen humid mixed and coniferous forest on slopes composed with silicate rocks.
Terrestrial herb to 1 m tall in shady places along slopes near tops of ridge. Flowers white. Common.