Iowa vascular flora, Iowa Loess Hills prairie, Great Plains flora, phytogeography
Based upon personal observations over a four year period, a preliminary overview of the phytogeographical significance of the prairies of the Loess Hills of western Iowa is discussed, concentrating upon a few representative taxa. A number of Great Plains vascular plant species reach the easternmost edge of their ranges in the Loess Hills. Climatic changes during the Holocene Period, especially during the Hypsithermal Interval, have had great effects upon the vegetation of the Great Plains and upon the xerophytic components of the Loess Hills. In addition, recent extended drought episodes have affected the flora. It is postulated that the Missouri River system has served, and may still serve, as a major migratory route for many of the Great Plains species found in the Loess Hills.
Proceedings of the Iowa Academy of Science
© Copyright 1985 by the Iowa Academy of Science
Novacek, Jean M.
"The Loess Hills of Western Iowa: a Problem in Phytogeography,"
Proceedings of the Iowa Academy of Science, 92(5), 213-219.
Available at: https://scholarworks.uni.edu/pias/vol92/iss5/13