Northern Vietnam, Lao Cai Prov., Van Ban Distr., Khanh Yen Ha municipality, to the SW of Na Nheo village (in the vicinity of point 21ø57'15''N, 104ø12'39''E). Primary broad-leaved evergreen montane forest along tops of granite/quartzite ridge at elev. 2300 m a.s.l. Lithophytic herb on high vertical shady mossy rocky cliff of SE exposition. Rare, but occasionally in very large colonies. Flowers pink-violet, lip with yellow center and brownish-purple spots.