Ferns have been objects of interest to botanists and cultivators; they have therefore been studied more than many of the flowering plants. Their simple structure and the apparently well-defined limitation of species has rendered them easier for purposes of study than many of the groups of Phaenogams. The purpose of this paper is to make a small contribution toward our knowledge concerning the spore characters of the different genera and species of North American ferns.
Proceedings of the Iowa Academy of Sciences
©1895 Iowa Academy of Science, Inc.
Weaver, C. B.
"A Comparative Study of the Spores of North American Ferns,"
Proceedings of the Iowa Academy of Science, 3(1), 159-161.
Available at: https://scholarworks.uni.edu/pias/vol3/iss1/33