FLORA OF VIETNAM Orchidaceae Juss. Calanthe aleizettii Gagnep.
N. Vietnam, Son La prov., Moc Chau distr., Long Luong municipality, near Sang Cai village (20°45′51′'N, 104°51′26′'E). Primary wet broad-leaved evergreen and semideciduous mossy forest along tops of remnant limestone highly eroded ridge at elev. 1500 m a.s.l. Terrestrial herb on steep shady rocky slope. Flowers odorless, tepals light violet, lip white with violet tint, white keels, column white. Rare.