Northern Vietnam, Lao Cai Prov., Van Ban Distr., Khanh Yen Ha municipality, in the vicinity of Na Nheo village (around point 21°59′24′'N, 104°16′23′'E). Old secondary open broad-leaved evergreen submontane forest with bamboo on very steep granite and quartzite slopes of mountain river canyon at elev. about 680 m a.s.l. Lithophytic creeping fern on large granite mossy boulders among agricultural areas on steep river slope. Very common. Usual co-dominant of lithophytic plant community on open rocks.