N. Vietnam, prov. Lai Chau, distr. Sin Ho, municipality Ta Ngau about 30 km of Lai Chau town to the N (N 22°18′ E 103°15′). Secondary open wet mossy evergreen broadleaved forest with remnants of primary elements on rocky steep slope of remnant karst limestone ridge at elev. about 1650 m. Forb up to 1.5 m hg in wet open mossy place. Not rare.
NTH 2778 25 May 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)