Viola canina, commonly known as heath dog-violet[2] and heath violet, is a species of the flowering plant in the violet family Violaceae.

It is native to Europe, where it is found in heaths, fens, and moist woodlands, especially on acidic soils.

[3] It is a herbaceous perennial plant growing to 5–15 cm tall.

The flowers are pale blue, produced from April to July.

[3] It is host to the pathogenic fungi Puccinia violae and Ramularia lactea.