Unfamiliar violet/ Roanoke,Va.
During one of my birding forays I ran across a violet that I can't find in my wildflower books so I turned to the internet and found this site. The leaves are oval and remind me more of common plantain than typical violet leaves. They did not appear to be hairy. The leaves form a rosette and lay close to the ground. The largest plants are only 2-3 inches in diameter. The flowers are purple and there are 1-2 flowers per plant.The flowers are on separate stems and are held an inch or less above the plant. They are blooming now (4/19). They are growing in shade under tall pines in rocky soil. I'm hoping someone can make an I.D. from this description. Also is there a book that covers most native American violets? One further question, how common/rare are white Bird foot violets?