N. Vietnam, prov. Cao Bang, distr. Bao Lac, municipality Yen Lac, vicinities of Yen Lac village (N 22°44′ E 105°50′). Secondary wet broadleaved evergreen forest in deep shady limestone ridge canyon along stream at about 1000 m elev. Terrestrial and lithophyte herb on wet shady rocks. Spathe light green with white central spot, stem white with grey marks or pure white. Occasionally common.
CBL 1452 16 April 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)