构属(Broussonetia)是桑科的其中一属，原产于东亚。
种.构树─ "Broussonetia papyrifera"<br>小构树 ─ "Broussonetia monoica"<br>藤蟠 ─ "Broussonetia kaempferi"<br>落叶花桑 ─ "Broussonetia kurzii"<br>楮 ─ "Broussonetia kazinoki × B. papyrifera"