Source: Raab-Straube, E. von & Henning, T. (2018+): Violaceae. – In: Euro+Med Plantbase - the information resource for Euro-Mediterranean plant diversity.
Euro+Medendemic: France, with Channel is. and Monaco (Channel islandsnativeA,B, FrancenativeA); Great BritainnativeA,B
Bibliography
A.Magrini, S. & Scoppola, A. 2015: Further studies in Viola Sect. Melanium (Violaceae). Identity and typification of Viola nana and V. henriquesii, two neglected European Atlantic taxa. – Phytotaxa 230: 259-266
B.Raab-Straube, E. von & Raus, Th. (ed.) 2015: Euro+Med-Checklist Notulae, 5. – Willdenowia 45: 449-464