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. Epiphyte. Not common. 27 September 2016 CPC 8056c. Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.V.Maisak, N.T.Son. Herbarium prepared in 13.05.2019. Flowers entirely white. L. Averyanov. Photos. Bulbophyllum sp.: CPC 8056a, d-e Sunipia sp. CPC 8056f