FLORA OF VIETNAM Orchidaceae Callostylis rigida Blume
Northern Vietnam, Lao Cai Prov., Van Ban Distr., to the west of Nam Xay village (1 km to the W of point 21°59′00′'N, 104°02′00′'E). Primary broad-leaved evergreen montane forest with Fokienia hodginsii (as emergent) on granite and quartzite very steep slopes at elev. 1500-1650 m a.s.l. Creeping epiphyte vine 1-1.5 m lg on high trees. Occasional.