Southern Vietnam, Dak Lak province, Ea So district, Ea So national protected area, evergreen broad-leaved forest along stream, about 400 m a.s.l., epiphyte, not common, 15 May 2016, Nguyen Van Canh, AL 446. Fl. and collected in culture, flowers light green, 13 Oct. 2018 in N.V. Canh Garden, Buon Ma Thuot City. Photos.