N. Vietnam, Prov. Hoa Binh, Distr. Mai Chau, subdistr. Pa Co, near 3 km to NE of Pa Co village. Primary evergreen mountain forest on the top of limestone ridge at 1200 m alt.
Epilitic herb with tesselated leaves. Flowers light green with brown irregular strips, slightly pleasant smelled, tip of staminode deep brown or nearly black. Rare, but occasionally abundant.
VH 2413 27.12.1995
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5094-93)
Participants: L. Averyanov, N.T. Ban, A. Budantzev, L. Budantzev, N.T. Hiep, D.D. Huyen, P.K. Loc, G. Yakovlev