N. Vietnam, prov. Cao Bang, distr. Ha Lang, municipality Thang Loi, vicinities of Lung Sam village (N 22°45′ E 106°42′). Secondary wet evergreen broadleaved forest with remnants of primary elements on steep slopes and bluffs of karst remnant limestone ridge at 500-550 m elev. Lithophyte herb up to 0.6 m hg in shady wet place in deep canyon along stream. Flowers white, tepals with yellow-brownish stripes. Leaves deep velvety green, with central white stripe. Common.
CBL 1657 23 April 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)