N. Vietnam, Thai Nguyen prov., Vo Nhai distr., Than Sa municipality, vicinities of Kim Son village (N 21°48′ E 105°54′), 23.3 km to 18° of Thai Nguyen city. Primary broadleaved evergreen dry forest along tops of karst remnant limestone ridge at elev. 450-550 m a.s.l. Lythophytic adpressed forb in crevices of shady cliffs. Leaves silver with irregular deep green palmate spot (or entirely silver) above, pale green with pinkish venation below; petiole pink. Very common.