N. Vietnam, prov. Lao Cai, distr. Sa Pa, S slope of Hoang Lien Son ridge at about 1900 m elev. Secondary middle short tall grasslands along road from Sa Pa to Lai Chau, in wet place. Flowers odorless: tepals pink-violet, sepals with deep purple veins; lip pinkish-violet, with numerous deep purple-violet veins and yellow center; column pink-violet, anther deep violet. Rare.
NTH 2661 18 May 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)