Viola palustris L. Engl.: marsh violet. Deu.: Sumpf-Veilchen. Sven.: kärrviol. Suom.: suo-orvokki.
Classic texts: Elizabeth Blackwell, 1737 (Vol. 1), 1739 (Vol. 2).
Flowering plants. Liljendal, Finland. Wild. 1996-05-01.
Flowers. Liljendal, Finland. Wild. 1996-05-01.
Flowering plant. Lammassaari, Helsinki, Finland. Wild. 2000-05-01.
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