FLORA OF VIETNAM (NEW) Orchidaceae Trias nummularia Aver. et Averyanova (Type)
S.Vietnam, Quang Tri Prov., Huong Hoa Distr., Huong Phung Municipality, Sa Mu pass on Ho Chi Minh trail at elev. 1130 m a.s.l. around point 16°48′17′'N, 106°34′28′'E. Wet evergreen broadleaved forest on very steep mountain slopes composed with granite and sandstones. Creeping epiphyte. Flowers odorless, tepals pure dull light yellow outside, dull light yellow with brown spots inside, lip dull green with brown spots, column and anther dull light yellow. Rare?