Viola riviniana, the common dog-violet, is a species of the genus Viola native to Eurasia and Africa. It is also called wood violet and dog violet. It is a perennial herb of woodland edges, grassland and shady hedge banks. It is found in all soils except acid or very wet.
Viola riviniana was voted the county flower of Lincolnshire in 2002, following a poll by the wild plant conservation charity Plantlife.