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 herb up to 1 m hg among shady rocks. Tepals purple with whitish base. Not common.
CBL 1387 15 April 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)