In the course of research on the taxonomy and evolution of various species of violets during the past ten years several techniques have been used which have proven effective in comparison of total species differences among wild violets. Two of these techniques are described below.
Proceedings of the Iowa Academy of Science
©1956 Iowa Academy of Science, Inc.
Russell, Norman H.
"Techniques for Species Comparison in Violets,"
Proceedings of the Iowa Academy of Science, 63(1), 157-160.
Available at: https://scholarworks.uni.edu/pias/vol63/iss1/11