A genus of plants, mostly herbs, with acid-tasting trifoliolate or multifoliolate leaves; -- called also wood sorrel.

any plant or flower of the genus Oxalis

Oxalis is the largest genus in the wood sorrel family Oxalidaceae. Of the approximately 900 known species in the Oxalidaceae, 800 belong to Oxalis. Many of the species are known as Wood Sorrel or Woodsorrel.

Oxalis acetosella