FLORA OF VIETNAM
Orchidaceae
Cleisostoma tricornutum Aver., sp.nov.

Thanh Hoa Prov., Thuong Xuan Distr., Van Xuan Municipality, Hang Cao village, Xuan Lien Natural Reserve.

Remnants of primary and secondary broad-leaved evergreen forest on highly eroded rocky limestone hills at elevation 100-200 m a.s.l. around point 19°50′47.2″N 105°14′42.7″E.

Epiphyte on shady very steep rocky slope. Common.

8 November 2013 CPC 6894
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, N.D.Thang, L.D.Qui
Living plant. Flowered in 10-25 December 2014. Flowers yellowish with light purple tint and indistinct purple nerves. Photos.