Flower spur blunt or notched at the tip always paler than the petals. (Viola riviniana)
by Rogier van Vugt
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Flowers slightly smaller than those of V. tricolor and often with more yellow in the flower. (Viola x contempta)
by Rogier van Vugt
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A plant of Marshes and bogs. Flowers pale lilac with dark veins, (Viola palustris)
by Rogier van Vugt
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Whole plant covered with many hairs. No runners, Flowers (pale) blue. Always on calcareous soils. (Viola hirta)
by Rogier van Vugt
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Flowers slightly bigger than those of V. arvensis and often with some blue on the upper petals. (Viola x contempta)
by Rogier van Vugt
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