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 ridges, grassland and shady hedge banks. It is found in all soils except acid or very wet.
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Its leaves are usually hairless.
- sweet violet (Viola odorata) - fragrant; all the leaves are located at the base of the plant; stipules are gland-tipped.
- heath dog violet (Viola canina) - clear blue flowers; narrower leaves; smaller teeth on the stipules.
- marsh violet (Viola palustris) - found in wet places; leaves are kidney-shaped; grows from underground creeping stems; dark-veined flowers; stipules without teeth.
- alpine violet (Viola labradorica) - V. riviniana is sometimes sold by nurseries as V. labradorica.
This species hybridises with early dog-violet (V. reichenbachiana) to produce Viola × bavarica.
- Partridge, James (2007) Viola × bavarica: the punctual Dog-violet BSBI News 106:8-9 (illustrated with colour photographs on inside back cover of this edition)
Media related to Viola riviniana at Wikimedia Commons
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