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 dry broadleaved evergreen forest on very steep rocky slopes of remnant karst limestone ridge at elev. about 250 m a.s.l. Adpressed lithophytic forb on shady wet rocks. Leaves very deep green with irregular palmate light green spot above, pale green with deep purple venation below. Petiole reddish. Very common, especially at elev. 50-100 m.