N. Vietnam, prov. Lao Cai, distr. Than Uyen, municipality Ho Mit (N 22°06′ E 103°52′). Elevation to Mang Han San quartzite peak by SW slope from Ban Thao village (SSW macroslope of Hoang Lien Son ridge). Primary wet evergreen broadleaved forest on very steep rocky slope at 1400-1500 m elev. Tree up to 20 m hg. Common at 1500-1700 m elev.
NTH 2801 21-22 May 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)