About Viola riviniana Rchb.
Viola riviniana Rchb., commonly known as common dog-violet, is a species of flowering plant in the Violaceae family that is native to Eurasia and Africa. It is also referred to by the common names wood violet and dog violet. This plant grows in woodland edges, grassland, and shady hedge banks, and grows in all types of soil except acidic or very wet soils. A prostrate perennial, it reaches 10 cm (3.9 in) tall and spreads up to 50 cm (20 in) wide, and has dark green, heart-shaped leaves. It produces multiple violet-colored flowers during May and June. In 2002, Viola riviniana was voted the county flower of Lincolnshire through a poll conducted by the wild plant conservation charity Plantlife. In terms of distribution, it is common across Ireland and all of the British Isles.