Kedrostis nana (or Ystervarkpatat) is a species of flowering plant in the family Cucurbitaceae, indigenous to scrub vegetation in the coastal areas of South Africa, from Saldanha in the west, along the coast as far east as KwaZulu-Natal.

It is a dioecious plant with leaves that are often almost entire and barely lobed (unlike its close relatives Kedrostis africana and Kedrostis capensis that are monoecious with deeply lobed leaves).

In its natural habitat, its greenish flowers are produced in February and March.

[1] Three varieties are recognised for this widespread and variable species, although they cannot always be clearly distinguished and many intermediate forms exist:[2]