Kham Mouan Prov., Bounlapha Distr., Thong Sam village, Hinnam No Protected Area, Pu Pha Song Mt. composed by sandstone, around point 17°35′13.2”N 105°47′49.8”E.
Primary evergreen broad-leaved and mixed forest on W macroslope at elevation from 500 m to the mountain top elevated to 1425 m.
Treelet 1 m tall and to 5 cm DBH. Very common on tops at elevations 1300-1425 m. Co-dominant of wind formed gnarled forest on mountain summit.