Endangered plant species, Iowa vascular flora, Lyon County flora, Sioux County flora, Threatened plant species
The combined vascular flora of Lyon and Sioux counties, Iowa, based upon field and herbarium study, is composed of 612 species, of which 454 species (74%) occur in both counties. The Lyon County vascular flora consists of 561 species, including 13 state endangered, 9 state threatened species, and 102 non-native species. The Sioux County vascular flora consists of 506 species, including 2 state threatened species and 106 non-native species. The floras are most notable for the presence of plants with floristic affinities to the Great Plains to the west of Iowa. They also have a very high percentage (18%-20%) of their floras comprised of non-native species, reflecting the intensity of human activities on the landscape.
Proceedings of the Iowa Academy of Science
©1984 Iowa Academy of Science, Inc.
Peck, James H.; Haglan, Burton W.; Eilers, Lawrence J.; Roosa, Dean M.; and Zee, Delmar Vander
"Checklist of the Vascular Flora of Lyon and Sioux Counties, Iowa,"
Proceedings of the Iowa Academy of Science, 91(3), 92-97.
Available at: https://scholarworks.uni.edu/pias/vol91/iss3/5