At the twentieth annual session of the Iowa Academy of Science held in Ames on April 20 and 21, 1905, Dr. C. E. Bessey of the University of Nebraska in his address on the Forest trees of Eastern Nebraska, expressed the wish that the Iowa botanists would join with those of Nebraska in making a tree survey of the two sides of the river. During the season of 1914 one of us received a letter from Prof. Sargent asking us to furnish him data on the distribution of Iowa trees. We found, however, that our knowledge of some species was very meager.
Proceedings of the Iowa Academy of Science
©1915 Iowa Academy of Science, Inc.
Pammel, L. H.; MacDonald, G. B.; and Clark, H. B.
"The Native and Cultivated Forest Trees and Shrubs of the Missouri River Basin,"
Proceedings of the Iowa Academy of Science, 22(1), 23-56.
Available at: https://scholarworks.uni.edu/pias/vol22/iss1/10