Trees to to 7 m tall. Branchlets gray, rarely with a purplish tinge, glabrous or gray downy. Petiole 5-8 mm; leaf blade obovate-elliptic or elliptic-lanceolate, rarely lanceolate, 3.5-6.5 × 1.8-2.8 cm, abaxially slightly white, glabrous or gray downy, adaxially dull green, base cuneate, margin conspicuously glandular serrulate or entire throughout or only basally, apex acuminate or acute. Male catkin ca. 3.5(-6) cm × 7 mm; peduncle long, with 3-5 leaflets; rachis downy; bracts oblong or elliptic, ca. 2 mm, pilose on both surfaces or abaxially glabrous distally, margin glandular dentate, apex obtuse or rounded-truncate. Male flower: glands broadly flattened, often connate at base, abaxial gland 2-or 3-lobed, adaxial gland 2-lobed; stamens 5-7, (1-) 3.5 mm, unequal; filaments downy at base; anthers broadly ellipsoid or subglobose. Female catkin 2-3(-4) cm, to 5 cm in fruit; bracts as in male catkin. Female flower: adaxial glands 1 or 2, sometimes 2-lobed; ovary long ovoid or ovoid-conical, 4-5 mm. Capsule ca. 9 mm, shiny. Fl. Apr-May, fr. Jun-Jul.
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