FLORA OF VIETNAM
Rubiaceae
Argostemma sp.

Thua Thien – Hue Prov., Nam Dong Distr., Thuong Lo Municipality, Cha Mang river basin, around point 16°07′53″N 107°43′27″E.

Primary evergreen broad-leaved lowland forest on very steep hill slopes composed with stratified shale at elev. 400-500 m a.s.l.

Terrestrial and lithophytic herb on very steep rocky shady river slope. Flowers white, anthers yellow. Not common.

HAL 11083 11 Apr. 2007.
Coll.: L.Averyanov, N.S.Khang, A.Averyanova, N.D.Phuong, L.V.Hung.