Phyllanthaceae, commonly known as the leaf-flower family, is a family of flowering plants in the eudicot order Malpighiales. It is most closely related to the family Picrodendraceae.

Notoleptopus is a monotypic genus of flowering plants in the family Phyllanthaceae. It is one of eight genera in the tribe Poranthereae. The sole species is Notoleptopus decaisnei. It is a monoecious