Frithia
 Frithia is a genus of plant in family Aizoaceae. Like several of its close relatives (e.g. Fenestraria) and other plants in its ecotype (e.g. some species of Haworthia and Bulbine) it has leaf-windows as an adaptation to the difficulties of photosynthesis in its arid environment. The genus contains the following species: Frithia pulchra N.E.Br. Frithia humilis Burgoyne.