FLORA OF LAOS
Rubiaceae Borikhamxai Prov., Khamkeut Distr., Phou Pha Mane pass around point 18°10′41”N 104°29′03”E.

Remnants of primary evergreen closed broadleaved forest on rocky limestone at elevation around 638 m a.s.l.

Shrub 2 m tall. Flower buds white. Occasional.

LA-VN 42 19 January 2009
Coll.: S.Bounphanmy, N.T.Hiep, L.Averyanov, V.Lamxay, P.K.Loc, N.Q.Hieu