The Oxalidaceae or wood-sorrel family contains only 5 genera but about 800- 900 species. It is in the order Oxalidales and is the largest family in that order. Made up of herbaceous plants, shrubs and small trees, most of the species in the family are in the genus Oxalis, which derives its name from the Greek oxys, "sour, sharp," referring to the taste of the leaves. Oxalis corniculata, the creeping wood-sorrel, is a common and widespread lawn weed, as is another, Oxalis pes-caprae, the so-called Bermuda buttercup, which is also fairly common but has no connection to Bermuda except as perhaps an introduced plant, and is in fact native to South Africa. The family also includes the genus Averrhoa or starfruit. The leaves are typically pinnately or palmately compound, often folding up in cold weather or at night, and the flowers are usually bright and showy, radially symmetrical, with 5 petals usually twisted together in bud. The leaves of Oxalis are sometimes used in salads.