FLORA OF VIETNAM Orchidaceae Collabium yunnanense Ormerod
Son La Prov., Moc Chau Distr., Chieng Son comm., Pha Luong village, Pha Luong Mountain (elevation from Pha Luong village at 930 m to Mt. peak at 1860 m a.s.l.). Primary cloud evergreen broad-leaved forest on flat Pha Luong summit composed with eroded red-brown sandstone at elevation 1750-1850 m a.s.l. around point 20°40′23.0N 104°37′52.0E. Creeping lithophytic and terrestrial herb on shady mossy boulders. Not common. 23 September 2016 CPC 8001. Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.V.Maisak, N.T.Son.
Herbarium prepared in 12.06.2019. Flowers odorless, tepals grassy green, lip white with small sparse deep purple marks, column and anther white. L. Averyanov.