FLORA OF VIETNAM
Orchidaceae
Polystachya concreta (Jack.) Garay & Sweet.

Vietnam, Quang Binh Prov., Minh Hoa Distr., Dan Hoa municipality, Vietnam-Laotian border, around Cha Lo military station, point 17°42′50″N 105°45′54″E.

Broad-leaved primary forest on very steep slopes and along ridge of remnant mountain composed with highly eroded solid marble-like gray limestone at elevation 500-750 m a.s.l.

Epiphyte on mossy trees along ridge edge. Not common.

HAL 11748 20 April 2008
Coll.: L.Averyanov, P.K.Loc, N.T.Vinh, N.S.Khang