This paper is preliminary to a more complete study of this group of lichens. Up to the present time, I have examined, aside from my own field collections in the vicinity of Oskaloosa two herbaria.
Proceedings of the Iowa Academy of Science
©1930 Iowa Academy of Science, Inc.
Stanley, Alfred R.
"Notes on Some Iowa Cladonias,"
Proceedings of the Iowa Academy of Science, 37(1), 95-100.
Available at: https://scholarworks.uni.edu/pias/vol37/iss1/16