The walnut family comprises six genera and about 35 species. Only two genera occur in Iowa, namely, Juglans (Walnut) and Hicoria (Hickory), and these two genera are represented by two and five species respectively. From an economic point of view the species are valuable and consequently have been largely utilized until but few specimens of the older forest remain. The younger growth is hardy and will, if spared, eventually yield fair returns.
Proceedings of the Iowa Academy of Sciences
©1900 Iowa Academy of Science, Inc.
Fitzpatrick, T. J. and Fitzpatrick, M. F. L.
"The Juglandaceae of Iowa,"
Proceedings of the Iowa Academy of Science, 8(1), 160-169.
Available at: https://scholarworks.uni.edu/pias/vol8/iss1/25