FLORA OF VIETNAM Orchidaceae Didymoplexiopsis khiriwongensis Seidenf.
N.Vietnam, Ha Tinh Prov., Huong Son Distr., Son Kim Municipality, Rao Bun stream around Rao An FPD station at 18°25′18′'N, 105°13′15′'E. Primary and secondary broad-leaved evergreen closed wet forest on very steep shale slopes of river canyon at elevation about 200-300 m a.s.l. Small achlorophyllous gray-yellowish saprophyte. Flowers white, lip with white, finely gray spotted callus above and with yellow-brown spot below. Rare.