Trees , 7-35 m, not suckering. Bark gray-brown to black, scaly. Branchlets drooping; segments 5-8[-13] × 0.5-0.7[-1] mm, usually densely pubescent at least in furrows, not waxy; longitudinal ridges angular with median rib; teeth not marcescent, (6-)7-8, erect, 0.3-0.8 mm. Young permanent shoots with erect to spreading teeth. Flowers unisexual, staminate and pistillate on same plant. Staminate spikes 0.7-4 cm, 7-11.5 whorls per cm; anthers 0.6-0.8 mm. Infructescences sparsely pubescent [tomentose]; peduncles 3-10 mm; infructescence body 12-24 × 9-11 mm; bracteoles acute. Samaras 6-8 mm.