FLORA OF VIETNAM
Orchidaceae
Calanthe sylvatica (Thouars) Lindl.

Cao Bang Prov., Thong Nong Distr., Yen Son Municipality, Ngan Vai village, around point 22°46′53″N, 105°52′58.7″E.

Primary fractionaly logged coniferous forest with Pseudotsuga sinensis along highly eroded rocky limestone ridge at elevation about 1300 m a.s.l.

Terrestrial rosulate herb in shady rocky places. Flowers purple. Common, but very rare in flowers.

7 October 2013 CPC 5453
L.Averyanov, N.T.Hiep, L.M.Tuan, N.S.Khang, T.Maisak, L.Osinovets