A search of herbarium data repositories available online revealed a notable collection of Carex scirpoidea (Cyperaceae) made by Joachim Heinrich Schuette in 1884 from Brown Co., Wisconsin, USA. This accession is the first and only known record of this now extirpated species from the state. While this locality represents a modest expansion of the known range of C. scirpoidea, errors in the aforementioned databases resulting from the complex nomenclatural history of this taxon confound our understanding of its distribution, particularly along its southern edge in the Midwest and Eastern North America.
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Bruederle et al. (2024) studied this question.
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