FLORA OF VIETNAM
Orchidaceae
Bulbophyllum hirundinis (Gagnep.) Seidenf.

Hoa Binh Prov., Lac Son Distr., Ngoc Son Municipality, Khu village, around point 20°26′31”N 105°19′32”E.

Primary broadleaved forest on steep rocky slopes of remnant mountain composed with solid crystalline highly eroded limestone at elevation about 550-650 m a.s.l.

Epiphyte on old trees on top of ridge. Not common.

CPC 1629a 27 March 2011
Coll.: N.Q.Hieu, L.Averyanov, N.T.Hiep, P.K.Loc, P.V.The, N.T.Vinh, T.B.Ngan, N.Tap, D.D.Dao, V.T.Ha.

Fl. under cultivation in July 2012. Flowers odorless, median sepal, petals, lip and column red-orange, lateral sepals yellow, operculum white. Photos.