Viola persicifolia, the fen violet, is a violet (family Violaceae), native to central and northern Europe and northern Asia. It grows to a height of 10–30 cm from a creeping rhizome, with narrow, triangular leaves 7–15 mm across. The flowers are produced in late spring to early summer, 10–15 mm diameter, pale bluish or yellowish-white with a short, greenish or yellowish spur. The petals are rounded and broad in relation to their width. Its habitat is confined to very local damp, lime-rich places, in long herbage (fens and limy marshes).