https://www.rhs.org.uk/plants/128989/viola-cucullata-striata-alba-(vt)/details
Viola cucullata 'Striata Alba' (Vt) | /RHS
viola cucullatastriataalbavtrhs
https://www.rhs.org.uk/plants/141232/viola-cucullata-blue-flowered/details
Viola cucullata blue-flowered | /RHS
viola cucullatabluefloweredrhs