Common Blue Violet (Viola papilionacea)
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- Blue-Eyed Mary
Violets have 5 petals, while blue-eyed Mary has 4.
- Long-Spurred Violet
The spur on the flower of the long-spurred violet is very conspicuous.
- Marsh Blue Violet
The Marsh Blue has is darker colored in the center of the flower, while Common Blue is uniform in color or slightly lighter in the center. Obviously, Marsh Blue grows in very wet areas, where the Common Blue doesn't.