Northern Bog Violet flower.
The flowers are dark violet, with a white center.
Side view of a flower.
Sometimes the flowers of Northern Bog Violet are white!
A clump of Northern Bog Violets.
Hairs inside the flower of Northern Bog Violet.
Sometimes the hairs inside violet flowers are an important indicator as to which species they are. In the case of Northern Bog Violet there are dense hairs on the two lateral petals, and very few on the bottom petal, and the hairs are not club-tipped (clavate).
Photo of an entire plant.
Note that Northern Bog Violet is what is termed a "stemless" violet. That is, the flower does not grow from the same stem as the leaves. Rather they are each on separate stems.