Sect. Triandrae Dumortier.

Trees or shrubs; bark exfoliating. Branchlets weak. Leaves usually stipulate; leaf blade lanceolate, both surfaces glabrous, margin regularly serrate, apex acute or acuminate. Flowering coetaneous. Catkins shortly pedunculate; bracts greenish yellow or yellowish. Flowers with adaxial and abaxial glands. Male flower: stamens 3(or 4), free. Female flower: ovary glabrous, long stipitate; style and stigma very short.