FLORA OF VIETNAM Orchidaceae Calanthe lyroglossa Rchb.f.
Ha Giang Prov., Bac Me Distr., Thuong Tan municipality.
Primary broad-leaved humid evergreen forest on very steep slopes and along rocky ridge composed with solid crystalline highly eroded limestone at elevation 1200-1285 m a.s.l. around point 22°38′19.0″N 105°17′06.5″E.
Terrestrial herb to 1 m tall along shady stream canyon. Flowers yellow. Locally very common.