Additions to the Pteridophyte Flora of Iowa-IV
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[1] J. Peck. Equisetum X litorale in Illinois, Iowa, Minnesota, and Wisconsin , 1980 .
[2] John Kartesz,et al. A Synonymized Checklist of the Vascular Flora of the United States, Canada and Greenland , 1980 .
[3] J. Peck,et al. A checklist of the vascular flora of Allamakee County, Iowa. , 1980 .
[4] J. Sarvela. A synopsis of the fern genus Gymnocarpium , 1978 .
[5] Jh Peck,et al. THE SELAGINELLA APODA COMPLEX IN IOWA. , 1978 .
[6] Masahiro Kato,et al. Classification of Athyrium and Allied Genera of Japan , 1977 .
[7] W. Buck. A new species of Selaginella in the S. apoda complex , 1977 .
[8] J. Beck. The Pteridophyte Flora of Iowa , 1976 .
[9] J. Peck. An Annotated Bibliography to the Literature on Bryophytes in Iowa , 1975 .
[10] W. H. Wagner,et al. New Data on North American Oak Ferns, Gymnocarpium , 1967 .
[11] M. Moore. Osmunda claytoniana L. , 1966 .
[12] C. Morton,et al. The Ferns and Other Pteridophytes of Iowa , 1961 .
[13] Elizabeth Eichstedt Root. Hybrids in North American Gymnocarpiums , 1961 .