The genus Fenestraria is comprised of one specie and one subspecie. The genus name is derived from the Latin word fenestra (window), fenestraria is the plural. The plants are also known as vensterplant (window plant) and baby toes. The plants are matt forming or they form single clumps. The succulents leaves are borne on short succulent stems, the plant is mainly subterranean with just the tips of the leaves appearing above the soil. Leaves are flat on top and windows are present, leaves are smooth and have a waxy layer. Plants are found from Luderitz in Namibia to Namaqualand in the Northern Cape, plants prefer areas with sandy or calciferous soils. The plants occur in a winter-rainfall area of 100mm or less.