N. Vietnam, prov. Cao Bang, distr. Nguyen Binh, municipality Ca Thanh, vicinities of Ta Phinh village (N 22°44′ E 105°50′). Primary open semideciduous mixed mossy forest (with Pseudotsuga brevifolia, Tsuga chinensis and Pinus kwangtungensis) along tops of remnant karst limestone ridge at 1350-1400 m elev. Terrestrial and lithophyte herb up to 0.7 m hg. Spathe light green with white longitudinal stripes. Stem brown-whitish tessellated. Not common. CBL 1568 19 April 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)