In 1954 and the early part of this year, in connection with a general study of the pteridophytes of Iowa (1955), the writer made dot distribution maps of the species. The maps were based upon specimens from the herbaria of Iowa State College, Iowa State Teachers College, Grinnell College and the State University of Iowa. The nomenclature and the treatment of the species followed generally that of the New Britton and Brown Illustrated Flora (Gleason, 1952)

Cooperrider, Tom S.

English

University of Northern Iowa

Proceedings of the Iowa Academy of ScienceVolume 62 | Annual Issue Article 151955Distribution of Pteridophytes in IowaTom S. CooperriderState University of IowaCopyright © Copyright 1955 by the Iowa Academy of Science, Inc.Follow this and additional works at: https://scholarworks.uni.edu/piasThis Research is brought to you for free and open access by UNI ScholarWorks. It has been accepted for inclusion in Proceedings of the Iowa Academyof Science by an authorized editor of UNI ScholarWorks. For more information, please contact scholarworks@uni.edu.Recommended CitationCooperrider, Tom S. (1955) "Distribution of Pteridophytes in Iowa," Proceedings of the Iowa Academy of Science: Vol. 62: No. 1 , Article15.Available at: https://scholarworks.uni.edu/pias/vol62/iss1/15Distribution of Pteridophytes in Iowa By TOM s. COOPERRIDER In 1954 and the early part of this year, in connection with a general study of the pteridophytes of Iowa ( 1955), the writer made dot distribution maps of the species. The maps were based upon specimens from the herbaria of Iowa State College, Iowa State Teachers College, Grinnell College and the State University of Iowa. The nomenclature and the treatment of the species fol-lowed generally that of the New Britton and Brown Illustrated Flora (Gleason, 1952). If the fem families recognized by Copeland (1947) are adopted, there are twelve families of pteridophytes known to occur in Iowa. (The genera of four of these: Pteridaceae, Aspidiaceae, Asplenia-ceae and Polypodiaceae have traditionally been included in the Polypodiaceae.) The families with the number of genera and species in each are listed below. Lycopodiaceae Selaginellaceae Isoetaceae Equisetaceae Ophioglossaceae Osmundaceae Pteridaceae Aspidiaceae Aspleniaceae Polypodiaceae Marsileaceae Salviniaceae Total No. of Genera 1 1 1 1 • 2 1 5 9 2 1 1 1 26 No. of Species 4 1 1 6 5 g 5 20 2 1 2 1 51 These plants occupy a variety of habitats . . Cheilanthes feei Moore is found on dry, dolomitic limestone of the northeastern counties; Cryptogramma stelleri (S. G. Gmel.) Prantl on cool, moist lime-stone ledges; Polypodium vulgare L. on sandstone outcrops; Sela-ginella rupestris (L.) Spring on sandy alluvium and dunes and sandy talus from sandstone and quartzite outcrops; Equisetum laevigatum A. Br. on sandy, prairie soils and railroad ballast; Thelypteris palustris Schott and Dryopteris cristata (L.) Gray in marshy or boggy places; and Botrychium virginianum (L.) Sw., among many others, in rich woodlands. Several noteworthy distribution patterns are shown by the maps. A few species are common throughout the state--Equisetum ar-vense L.,. E. laevigatum, E. hiemale L., Botrychium virginianum,. 139 1Cooperrider: Distribution of Pteridophytes in IowaPublished by UNI ScholarWorks, 1955140 IOWA ACADEMY OF SCIENCE [Vol. 62 Adiantum pedatum L., Athyrium filix-f emina (L.) Roth and Cys-topteris fragilis (L.) Bernh. Onoclea sensibilis L. and Matteuccia struthiopteris (L.) Todaro have been collected from all but the westernmost tiers of Iowa counties. Another group of species occurs with some frequency in the northeastern half of the state, their westernmost stations being, with few exceptions, along the Des Moines River from Keosauqua to Fort Dodge, or near the Iowa River in Hardin County. Among these are Lycopodium lucidulum Michx., Osmunda claytoniana L., Cryptogramma stelleri, Pellaea atropurpurea (L.) Link var. burhii Mackenzie, Pteridium aquilinum (L.) Kuhn, Athyrium thelyp-t~oides (Michx.) Desv., Cystopteris bulb if era (L.) Bernh., Dry-opteris goldiana (Hook.) Gray, D. spinulosa (0. F. Muell.) Watt, Thelypteris hexagonoptera (Michx.) Weatherby, T. palustris and Camptosorus rhizophyllus (L.) Link; this last species, however, is also known from Fremont and Harrison counties on the western border. Two other species, Selaginella rupestris and Polypodium vulgare, have ranges similar to those of the species above, but have also been collected in Lyon County. Two fems growing for the most part in southeastern counties of Iowa are Polystichum, acrostichoides (Michx.) Schott and Asplenium platyneuron (L.) Oakes. Equi-setum fluviatile L. grows mainly in the north-central "lake district", but also occurs in eastern counties. Several species occur quite rarely in the state, some of them not represented by any recent collections. Pfeiffer ( 1922) reports that lsoetes melanopoda Gay & Durieu was collected near Clinton, Iowa, in 1863 by Vasey. It has not been collected in Iowa since. Specimens of Thelypteris phegopteris (L.) Slosson were last col-lected by Macbride and Reppert from Delaware and Muscatine counties, respectively, near the end of the last century. Marsilea mucronata A. Br. was collected only once in the state, in Lyon County by Shimek in 1899. Equisetum pratense Ehrh., however, has been collected since 1952 from several eastern counties: Winneshiek, Clayton, Dubuque and Muscatine. Botrychium dissectum Spreng. has been collected re-cently from Johnson County by Drexler and in Washington County by Wagenknecht. On field trips led by Dr. Robert F. Thome in the summer of 1954, two new species of the Ophioglossaceae were found in Linn County. These were Botrychium simplex E. Hitch-cock and Ophioglossum vulgatum L. This is to be reported, along with the Iowa distribution of all members of this family, in another paper by the writer (in press). Herbarium specimens of Osmunda cinnamomea L. were discover-ed from three counties, Jackson, Muscatine and Jasper, that from the last a somewhat doubtful, sterile specimen. Athyrium Prcnocar-2Proceedings of the Iowa Academy of Science, Vol. 62 [1955], No. 1, Art. 15https://scholarworks.uni.edu/pias/vol62/iss1/151955] PTERIDOPHYTES IN IOWA 141 pon (Spreng.) Tidest., previously known only from northeastern Iowa, was collected recently in Washington County by Wagen-knecht. Marsilea quadrifolia L., an introduced plant, has become well established at Lake Keosauqua and was lately collected there. Recent collections of other rare pteridophytes have been reported by Thorne ( 1954) . Our knowledge of ranges of the smallest Iowa pteridophytes is probably quite incomplete. The conspicuous aspect of most pteri-dophytes, however, calls to them the attention of the collector of vascular plants, and the true limits of their ranges in Iowa are doubtless near those currently known. Bibliography Cooperrider, T. S. 1955. The pteridophytes of Iowa. Unpublished M. S. thesis. State University of Iowa . ..................... In press. The Ophioglossaceae of Iowa. Amer. Fern Jour. Copeland, E. B. 1947. Genera Filicum. Chronica Botanica Co. Waltham, Mass. Gleason, H. A. 1952. New Britton and Brown Illustrated Flora of North-eastern United States and Adjacent Canada. Vol. 1. Lancaster Press. Lancaster, Pa. Pfeiffer, N. E. 1922. Monograph of the Isoetaceae. Ann. Missouri Bot. Gard. 9: 79-232. Thorne, R. F. 1954. Notes on rare Iowa plants. Proc. Iowa Acad. Sci 60 ( 1953): 260-274. DEPARTMENT OF BOTANY STATE UNIVERSITY OF IowA IowA CITY, IowA 3Cooperrider: Distribution of Pteridophytes in IowaPublished by UNI ScholarWorks, 1955

Distribution of Pteridophytes in Iowa

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Distribution of Pteridophytes in Iowa

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