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Interesting to see a violet that isn't one of the three I'm fairly confident with so far. Thanks.
I am in the same position. Getting my "eye in" for V. riviniana, V. reichenbachiana and V. odorata but had to go back to the books to check this one out. The hard thing is to keep on looking at them closely without assuming it is one of the commoner ones - I mis-identified V. hirta because I assumed it was Early Dog Violet!
I may be getting a bit too cocky - noticed some plants labelled Viola odorata in the garden centre yesterday, and I knew (without sniffing!) that they weren't odorata. They were Viola riviniana - and told the staff that the plants were mislabelled. A bit mean to sell non-scented ones labelled scented!
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