FLORA OF VIETNAM Orchidaceae Porpax lanii Seidenf.
N. Vietnam, prov. Cao Bang, distr. Bao Lac, municipality Dinh Phung, Nam Linh mt. (N 22°47′ E 105°49′). Old secondary broadleaved wet mossy cloud forest along tops of remnant karst limestone Nam Linh ridge at 1550-1600 m alt. Epiphyte in open vertical cliffs. Rare.
CBL 1428a 15 April 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)