Tree to 25 m high, widespreading; bark strongly fissured. Branchlets and shoots long, slender, pendulous, shining dark green, rather brittle, hairy at first. Lvs becoming glabrous. Buds densely whitish hairy. Petiole mostly 0.5-1.5 cm long. Lamina 7-17 × 1.5-3.5 cm, lanceolate, shining above, glaucescent below, serrulate, entire on reproductive shoots; apex long-acuminate. Stipules very small or 0, curved at apex. Lvs subtending catkins 1-1.5 cm wide. Catkins ♀, produced after lvs on short leafy shoots, 2.3-4 cm long, narrow-cylindric; rachis villous. Bracts 2-3 mm long, lanceolate or lanceolate-oblong, green, somewhat incurved, pilose towards base; apex ± obtuse. Glands 1-(2), 0.5-0.9 mm long, ovate-oblong or rectangular, sometimes broader than long. Ovary glabrous; pedicel very short.