Large-growing plant to 30 cm or more tall. Leaves to 8 cm long. Flowers relatively large, soft lavender blue on medium-length stems; spring to summer.
W Asia, C & E Europe
Grows naturally in marshy areas.
Source: (1997). Violaceae. In: . Horticultural Flora of South-eastern Australia. Volume 2. Flowering plants. Dicotyledons. Part 1. The identification of garden and cultivated plants. University of New South Wales Press.