FLORA OF VIETNAM
Orchidaceae
Biermannia calcarata Aver.

Hoa Binh Prov., Lac Son Distr., Tu Do Municipality, Mon village, around point 20°25′29”N 105°19′36”E.

Primary broad-leaved forest on steep rocky slopes of remnant mountain composed with solid crystalline highly eroded limestone at elevation about 500-700 m a.s.l.

Canopy epiphyte on tall tree on rocky slope. Occasional.

CPC 1592c 25 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. et coll. under cultivation at August 2013 and September 2014. Flowers odorless, white. L.Averyanov. Photos.