Hoa Binh Prov., Tan Lac Distr., Ngo Luong Municipality, Tram Hai Village, Dong Xien mountainous range, ca. 1 km to S of coordinate ca. 20°28′15”N 105°17′21”E, locality of FPD no 3 of Ngoc Son-Ngo Luong NR.
In heavily logged evergreen broad-leaved woodland and scrub on top ridges of limestone mts., at elevation about 800 m a.s.l. Small shrub, ca. 2-3 m tall. Flowers greenish-whitish. Rare.