Son La Prov., Son La City, Chieng Co Municipality, around point 21°18′24”N 103°52′53”E. Secondary evergreen dry open broad-leaved forest on very steep rocky slopes and on tops of remnant mountain composed with highly eroded marble-like solid crystalline limestone at elevation 800-900 m a.s.l. Epiphyte on old tree canopy branches along rocky tops of ridge. Not common. CPC 1139a/01 20 December 2010 Coll.: L.Averyanov, P.K.Loc, P.V.The, N.T.Vinh.
Fl. under cultivation in 20 September 2016. Flowers rich yellow, lip with brown center.