Hi, I got two native violets V. adunca and V. palustris from a mail order nursery last year. The first photo is taken of the planted V. adunca. The second photo is of where I planted the V. palustris, but it looks like a seedling of V. adunca has volunteered itself, but I am not sure! They are so similiar...Am I correct in guessing that the leaves of V. palustris are slightly more lime green, while V. adunca has darker green leaves? The last 3 photos (20150414..) show the mystery seedling growing with the V. palustris. The long root is actually quite woody. And I can't be certain whether the hook on the back of the flower indicates the species or not? I have done research and most sources say they don't hybridize, but if they don't, which species is it? Has a volunteer spread there, or did I mix up the plantings of the two in the beginning? I can take more photos if there is something that will help identification. Help!