FLORA OF VIETNAM
Orchidaceae
Phreatia formosana Rolfe ex Hemsl. var. continentalis (Gagnep.) Aver. Type

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 on vertical cliff. Not common.

HAL 11740 20 April 2008
Coll.: L.Averyanov, P.K.Loc, N.T.Vinh, N.S.Khang

Fl. et coll. In Komarov Institute Garden at 12 May 2009. Flowers pure white, sweet densely fragrant.