酢浆草科（Oxalidaceae，广东人俗称“酸微草”或“酸味草”）多汁草本、灌木或小乔木。单叶、三出复叶或羽状复叶，具托叶；小叶呈倒心形、长椭圆或扁三角形。两性花，单生或成繖形状聚繖花序；萼片5；花瓣5，白、黄、淡黄或粉紫红色；雄蕊10-15；子房5室。蒴果。

感应草属（羞礼花属，en:Biophytum，非含羞草属）特征是羽状复叶，簇生茎顶。

酢浆草属（Oxalis）单叶，3深裂，基生或生于茎节上。**产酢浆草属（Oxalis）植物有3种及一亚种的变种。

其他还有园艺观赏用的外来品种，如三角紫叶酢浆草（Oxalis regnellii atropurpurea）。

The Oxalidaceae, or wood sorrel family, are a small family of eight genera of herbaceous plants, shrubs and small trees, with the great majority of the 900 species in the genus Oxalis (wood sorrels). Members of this family typically have divided leaves, the leaflets showing "sleep movements", spreading open in light and closing in darkness.