N.Vietnam, Bac Kan Prov., Na Ri Distr., Liem Thuy Municipality, village Lung Vai, around point 21°57′18′'N, 106°06′12′'E, at elevation 500-600 m a.s.l.
Remnants of primary broad-leaved evergreen closed forest on steep shale slopes on foothill of rocky ridge composed with white solid marble-like crystalline limestone.
Tree 8-12 m tall on tops of ridge. Syconia green with purple tint at apex. Petioles pink-brown. Occasional.