Rebutia  is a genus in the family Cactaceae, native to Bolivia and Argentina.

It was designated in 1895 by Karl Moritz Schumann and named after Pierre Rebut (1828-1898), a French cactus nurseryman. The type species is R.minuscula, which has been in cultivation since 1887. These are generally small, colorful cacti, globular in form, which freely produce flowers that are relatively large in relation to the body. They have no distinctive ribs, but do have regularly arranged small tubercles. They are considered fairly easy to grow and they may produce large quantities of seeds that germinate freely around the parent plant.

Synonymy

There has been considerable debate about the extent of the genus. In the middle of the twentieth century there was a tendency to separate groups of plants within Rebutiaas new genera, e.g. Mediolobivia, whereas towards the end of the century the reverse tendency predominated, with genera previously regarded as separate, such as Weingartia, being subsumed within Rebutia. At the beginning of the twenty-first century there was a broad consensus, as reflected in the list of Vascular Plant Families and Genera maintained at the Royal Botanic Gardens.