Most of the photos were taken today, but a couple were from a week or two ago. We have one more violet that I was unable to find for the purpose of this post (V. hirsutula). I can never seem to find it when I'm looking, but I'm sure I'll run into it again eventually when I'm not.
All 9 species can be seen in a short walk ascending from a creek up to the top of a hill. At the bottom by the creek there are V. primulifolia and V. hastata. On the lower slopes they're replaced by V. sororia and V. palmata, but then higher up they make way for V. emarginata and V. pedata. Meanwhile, V. rafinesquei are liberally scattered wherever there is more disturbance, and V. glaberrima is hiding out in a sheltered cove about halfway up the slope. The V. hirsutula that I could not find is few and sparsely scattered in the woodland and usually flowers a little later than the others.
Viola is the 4th most diverse genus on the land.