A study of some of the troublesome perennial weeds and their methods of extermination has led the authors to look up the botanical descriptions of the underground portions and manner of propagation.
Proceedings of the Iowa Academy of Science
©1909 Iowa Academy of Science, Inc.
Pammel, L. H. and Fogel, Estelle D.
"The Underground Organs of a Few Weeds,"
Proceedings of the Iowa Academy of Science, 16(1), 31-40.
Available at: https://scholarworks.uni.edu/pias/vol16/iss1/10