FLORA OF VIETNAM
Orchidaceae
Calanthe sylvatica (Thouars) Lindl. Ha Giang Prov., Bac Me Distr., Phieng Luong municipality, around Phieng Luong village. Primary broad-leaved humid evergreen forest on very steep slopes and along rocky ridge composed with solid crystalline highly eroded limestone at elevation 1100-1150 m a.s.l. around point 22°38′07.1″N 105°19′22.1″E. Creeping canopy epiphyte on shady steep rocky slope. Occasional.
13 November 2014 CPC 7398b / TM 1133b
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, T.Maisak, L.Osinovetz
Flowered at 31 July 2017. Flowers purple, photos