N. Vietnam, Bac Can prov., Na Ri distr., Kim Hy municipality, vicinities of Lung Hin Con village (N 22°17′ E 106°03′), 27 km to 55° of Bac Can city. Primary evergreen mixed mossy forest with Pseudotsuga, Keleleeria and bamboo on top of karst remnant limestone ridge at elev. 750-800 m a.s.l. Lithophytic forb on open rocks. Not common.