Albizia julibrissin is a species of legume in the genus Albizia, native to southwestern and eastern Asia, from Persia east to China and Korea. Albizia julibrissin is a small deciduous tree growing to 5–12 m tall, with a broad crown of level or arching branches. The bark is dark greenish grey in colour and striped vertically as it gets older.
The genus is named after the Italian nobleman Filippo degli Albizzi, belonging to the famous Florentine family Albizzi, who introduced it to Europe in the mid-18th century, and it is sometimes incorrectly spelled Albizzia.
The leaves are bipinnate, 20–45 cm long and 12–25 cm broad, divided into 6–12 pairs of pinnae, each with 20–30 pairs of leaflets; the leaflets are oblong, 1–1.5 cm long and 2–4 mm broad. The flowers are produced throughout the summer in dense inflorescences, the individual flowers with no petals but a tight cluster of stamens 2–3 cm long, white or pink with a white base, looking like silky threads.