S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 29 km to NEE from Dalat city. Old open evergreen broadleaved secondary forest rich in primary elements along mt river on W macroslope of Bi Dup mt system at 1450 m alt (N 12° 08′, E 108° 39′). Epilite on open granite river coastal bluffs. Rare, but occasionally abundant. VH 4017 16.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)