Notoleptopus is a monotypic genus of flowering plants in the family Phyllanthaceae.

Notoleptopus decaisnei had long been treated as a species of Leptopus, but in 2007, a molecular phylogenetic study of DNA sequences found it to be sister to a clade consisting of Pseudophyllanthus and Poranthera.

Bentham describes the species Andrachne Decaisnei as follows:Apparently annual, but the stems hard and woody-looking at the base, much branched, decumbent, attaining 1 to 2 or even 3 ft., the whole plant softly villous.

Female flowers solitary in the same axils as the males, on pedicels attaining 1 line when in fruit.

Calyx-segments under the fruit broadly ovate, fully 1 line long, the base of the calyx contracted into a distinct stipes.