The national lakeshore provides habitat for 1,130
native vascular plants, including the federally threatened Pitcher’s
thistle. The lakeshore is home to populations of 30% of the state of
Indiana’s listed rare, threatened, endangered, and special concern plant
species. Shaped by glacial events and changing climates, the dunes
landscape contains disjunct flora representative of eastern deciduous
forests, boreal forest remnants, and species with Atlantic coast
affinities. In addition, the national lakeshore is part of the upper- and
eastern-most limits of the tallgrass prairie peninsula and supports high
quality remnants of this ever-diminishing vegetation type.
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