https://www.paldat.org/pub/Viola_palustris/301114
PalDat - Viola palustris
PalDat is the world's largest database for Palynological Data
viola palustris
https://www.uksouthwest.net/wildflowers/violaceae/viola-palustris1.html
Photographs of Viola Palustris, UK Wildflowers; Pale purple flower
Photographs of violaceae wildflowers. Pale purple flower of marsh violet (viola palustris), Dart Valley, Devon
viola palustrispurple flowerphotographswildflowerspale
https://biodiversite.rnn-hautechainedujura.fr/espece/129639
Violette des marais - Viola palustris | Biodiv'Haute Chaîne du Jura - Réserve naturelle nationale...
viola palustrisviolettedesmaraishaute