FLORA OF VIETNAM Orchidaceae Dendrobium chrysanthum Wall. ex Lindl.
Son La Prov., Moc Chau Distr., Chieng Son comm., about 1 km to NE from Chieng Son Village, around point 20°46′02.0N 104°37′03.1E.
Remnants of primary broad-leaved evergreen forest on tops of hills composed with karstic highly eroded yellow-white limestone at elevation 1150-1250 m a.s.l.
Lithophyte and epiphyte on mountain top. Flowes yellow, lip with brown spot. Not common.