The writer has included shrubs found as far north as La Crosse, Wisconsin, where several tamarack swamps occur with their peculiar shrubs; also shrubs of Allamakee and Winneshiek counties where Doctor Shimek has found a number of most interesting shrubs.
Proceedings of the Iowa Academy of Science
©1921 Iowa Academy of Science, Inc.
Pammel, L. H.
"Shrubs of the McGregor District,"
Proceedings of the Iowa Academy of Science, 28(1), 268-271.
Available at: https://scholarworks.uni.edu/pias/vol28/iss1/45