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. Shrub 1.5 m tall on mountain top at elevation 1400 m. Flowers pink-purple. Very common.