Sourgrass is a common name given to several plant species which have a sour taste. Most are in fact not

grasses Poaceae () or Gramineae () is a large and nearly ubiquitous family of monocotyledonous flowering plants commonly known as grasses. It includes the cereal grasses, bamboos and the grasses of natural grassland and species cultivated in lawns and ...

True grasses

* '' Digitaria insularis'' (sourgrass) *''

Paspalum conjugatum ''Paspalum conjugatum'', commonly known as carabao grass or hilo grass, is a tropical to subtropical perennial grass. It is originally from the American tropics, but has been naturalized widely in tropical Southeast Asia and Pacific Islands. It h ...

'' (carabao grass)

Other

* ''

Oxalis ''Oxalis'' ( (American English) or (British English)) 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 region, polar are ...

'' species (woodsorrels) of the

Oxalidaceae The Oxalidaceae, or wood sorrel family, are a small family of five genera of herbaceous plants, shrubs and small trees, with the great majority of the 570 species in the genus ''Oxalis'' (wood sorrels). Members of this family typically have divid ...

, namely: ** ''

Oxalis corniculata ''Oxalis corniculata'', the creeping woodsorrel, procumbent yellow sorrel or sleeping beauty, is a somewhat delicate-appearing, low-growing herbaceous plant in the family Oxalidaceae. It resembles the common yellow woodsorrel, ''Oxalis stricta'' ...

'' (creeping woodsorrel) ** ''

Oxalis pes-caprae ''Oxalis pes-caprae'' (African wood-sorrel, Bermuda buttercup, Bermuda sorrel, buttercup oxalis, Cape sorrel, English weed, goat's-foot, sourgrass, soursob or soursop; ) is a species of tristylous yellow-flowering plant in the wood sorrel famil ...

'' (Bermuda-buttercup) ** ''

Oxalis grandis ''Oxalis grandis,'' commonly known as great yellow woodsorrel or large yellow wood sorrel, is an annual plant and herb in the woodsorrel family. It is native to the eastern United States from Georgia north to Pennsylvania and Wisconsin, west as ...

'' (large yellow woodsorrel) ** ''

Oxalis montana ''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 ...

'' (mountain woodsorrel) ** ''

Oxalis stricta ''Oxalis stricta'', called the common yellow woodsorrel (or simply yellow woodsorrel), common yellow oxalis, upright yellow-sorrel, lemon clover, or more ambiguously and informally "sourgrass", "sheep weed", or "pickle plant", is a herbaceous pla ...

'' (yellow woodsorrel) * ''

Rumex acetosella ''Rumex acetosella'', commonly known as red sorrel, sheep's sorrel, field sorrel and sour weed, is a species of flowering plant in the buckwheat family Polygonaceae. Native to Eurasia and the British Isles, the plant and its subspecies are commo ...

'' (sorrel) of the

Polygonaceae The Polygonaceae are a family of flowering plants known informally as the knotweed family or smartweed—buckwheat family in the United States. The name is based on the genus '' Polygonum'', and was first used by Antoine Laurent de Jussieu in 1 ...

{{Plant common name