Quang Binh Prov., Minh Hoa Distr., Thuong Hoa Comm., Ban On Vill., Pa Nun Valley, 17°40′22″N, 105°58′22″E, 250m In heavily logged primary evergreen broad-leaved forests on foot of limestone mts. Medium-sized tree, 15-20 x 0.3-0.5 m. Flowers opened, fallen down already