Oxalis is a large genus of flowering plants in the wood-sorrel family Oxalidaceae, comprising over 550 species. The genus occurs throughout most of the world, except for the polar areas; species diversity is particularly rich in tropical Brazil, Mexico, and South Africa.
Oxalis corniculata, the creeping woodsorrel, procumbent yellow sorrel or sleeping beauty, is a somewhat delicate-appearing, low-growing herbaceous plant in the family Oxalidaceae.
Sourgrass is a common name given to several plant species which have a sour taste. Most are in fact not grasses:
Trifolium aureum, known by the various common names large hop trefoil, large trefoil, large hop clover, golden clover or hop clover, is a species of flowering plant native to much of Eurasia.
Oxalis pes-caprae is a species of tristylous yellow-flowering plant in the wood sorrel family Oxalidaceae. Oxalis cernua is a less common synonym for this species. Some of the most common names for the plant reference its sour taste owing to oxalic acid present in its tissues. Indigenous to South Africa, the plant has become a pest plant in different parts of the world that is difficult to eradicate because of how it propagates through underground bulbs.
Oxalis violacea, the violet wood-sorrel, is a perennial plant and herb in the family Oxalidaceae. It is native to the eastern and central United States.
Oxalis stricta, called the common yellow woodsorrel, common yellow oxalis, upright yellow-sorrel, lemon clover, or more ambiguously and informally "sourgrass", "sheep weed", or "pickle plant", is a herbaceous plant native to North America, parts of Eurasia, and a rare introduction in Britain. It tends to grow in woodlands, meadows, and in disturbed areas as both a perennial and annual. Erect when young, this plant later becomes decumbent as it lies down, and branches regularly. It is not to be confused with similar plants in the same genus which are also often referred to as "yellow woodsorrel".
Oxalis bowiei, Bowie's wood-sorrel, red-flower woodsorrel, or Cape shamrock, is a plant from the genus Oxalis, which is native to what was Cape Province and KwaZulu-Natal in South Africa. It has also been naturalized in Australia.
Oxalis barrelieri, the Barrelier's woodsorrel, or lavender sorrel, also commonly called in French trèfle, oseille-marron, or oseille-savane, is a plant from the genus Oxalis. It also bears the Latin synonym, Oxalis bahiensis. It is native to the West Indies and to Central America and South America. It was introduced into parts of Africa, Ceylon, and Malesia. It is considered a weed in the Caroline and Mariana Islands and in Samoa.
Oxalis spiralis, the spiral sorrel, is a species of plant of the genus Oxalis, a member of the wood sorrel family Oxalidaceae.
Oxalis triangularis, commonly called false shamrock, is a species of perennial plant in the family Oxalidaceae. It is native to several countries in southern South America. This woodsorrel is typically grown as a houseplant but can be grown outside in USDA climate zones 8a–11, preferably in light shade.
Oxalis albicans, commonly known as radishroot woodsorrel, is North American species of perennial herbs in the woodsorrel family. It is widespread in Mexico and the southwestern United States.
Sorrel, Rumex acetosa, is a perennial herb cultivated as a leaf vegetable.
Helianthus occidentalis, the fewleaf sunflower or western sunflower, is a species of sunflower native to the Eastern and Central United States. It grows mostly in the Great Lakes Region and in the Ozarks, with additional populations scattered as far as Massachusetts, Texas, and the Florida Panhandle.
Oxalis latifolia is a species of flowering plant in the woodsorrel family known by the common names garden pink-sorrel and broadleaf woodsorrel. It is native to Mexico and parts of Central and South America.
Oxalis montana is a species of flowering plant in the family Oxalidaceae known by the common names mountain woodsorrel, wood shamrock, sours and white woodsorrel. It may also be called common woodsorrel, though this name also applies to its close relative, Oxalis acetosella.
Oxalis debilis, the large-flowered pink-sorrel or pink woodsorrel, is a perennial plant and herb in the family Oxalidaceae. Its original distribution is South America but has become a very cosmopolitan species, occurring in all continents except Antarctica. It can be found in both temperate and tropical areas.
Oxalis priceae, the tufted yellow woodsorrel, is a species of flowering plant in the woodsorrel family. It is native primarily to southeastern North America, with a disjunct population being known from montane areas of Nuevo León, Mexico. This species is found in dry, rocky, calcareous areas such as cedar glades and cliff faces, but it is occasionally found in oak-pine woodlands and longleaf pine savanna as well.
Oxalis dillenii, the southern wood-sorrel, slender yellow woodsorrel, or Dillen's oxalis, is a species in the woodsorrel family. Like other Oxalis species, the leaves of this plant resemble clover leaves, with three leaflets. The flowers have five yellow petals that are 4 to 10 mm in length. The leaflets are 1 to 2 cm wide with pointed hairs. The fruits are rather brown and are 1.5 to 2.5 cm. It is often considered a weed, and can be found worldwide, but likely originated in North America.
Oxalis alpina is a herbaceous perennial plant also known by its common name alpine woodsorrel. It is a species belonging to the genus Oxalis.O. alpina is found in North America and Central America from Guatemala to the southwestern United States.
