About Viola canina L.
Viola canina L., commonly called heath dog-violet and heath violet, is a flowering plant species belonging to the violet family Violaceae. It is native to Europe, where it grows in heaths, fens, and moist woodlands, most commonly on acidic soils. This is a herbaceous perennial plant that reaches a height of 5–15 cm (2.0–5.9 in). Its pale blue flowers bloom from April to July. This species can form large, extensive colonies. Viola canina acts as a host for two pathogenic fungi: Puccinia violae and Ramularia lactea.
