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. Terrestrial and lithophyte herb up to on open wet mossy vertical cliffs. Flowers lilac. Very common.
CBL 1396 15 April 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)