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Document Type

Research

Keywords

Roggman Boreal Slopes; Clayton County, Iowa; Iowa flora; The Nature Conservancy; endangered species; boreal species; relict species; Aconitum noveboracense Gray

Abstract

Charles and Anna Roggman Boreal Slopes is a 20 acre (8.1 ha) Nature Conservancy preserve situated on the floodplain and adjacent northfacing slope of a tributary of Buck Creek in Clayton County, northeastern Iowa. My study of the preserve in 1981 revealed a vascular flora of 160 species representing 59 families. Three plant communities were recognized: ash-elm on the floodplain, maple-basswood on the slope, and an unusual "boreal slope" community in areas of the slope with cold air drainage. The last contains several species with boreal American or circumboreal distributions which have probably persisted since the Pleistocene. Eleven species protected by state and federal laws inhabit the preserve. The most significant is Aconitum noveboracense Gray, known from only 17 localities worldwide, listed as endangered in Iowa and as threatened in the United States.

Publication Date

September 1983

Journal Title

Proceedings of the Iowa Academy of Science

Volume

90

Issue

3

First Page

107

Last Page

111

Copyright

© Copyright 1983 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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