FLORA OF LAOS
Orchidaceae
Dendrobium gratiosissimum Reichenb.f.

Borikhamxai Prov., Khamkeut Distr., Dan Khum Ngan locality, Watershed Managing Protected Authority (WMPI) region around point 17°57′32”N 105°01′05”E.

Open primary broadleaved forest on thin soils and on flat granite outcrops at elevation around 538 m a.s.l.

Epiphyte on tall trees. Not common.

LA-VN 21b 18 January 2009
Coll.: S.Bounphanmy, N.T.Hiep, L.Averyanov, V.Lamxay, P.K.Loc, N.Q.Hieu

Flowered in Komarov Botanical Institute in March 2009. Flowers odorless, tepals white, light purple to apex, lip white, with yellow center, and dark purple-violet marks at the base, apex light purple. Photos.