New and Noteworthy Sedge Records in Illinois

Hill, Steven R.
September 2010
Transactions of the Illinois State Academy of Science;2010, Vol. 103 Issue 3/4, p85
Academic Journal
Sedges (Cyperaceae) are a very diverse and significant group of plants in Illinois, as elsewhere, with approximately 250 species reported, approximately 150 of which are in the genus Carex (the most species-rich genus in Illinois). This study discusses 15 taxa in particular, three of which (Carex cherokeensis, C. triangularis, and Lipocarpha aristulata) are reported for the state of Illinois for the first time. Two additional taxa, Carex aureolensis and C. oklahomensis, were reported in 2002 for the first time in Illinois in the Flora North America based upon specimens cited here. The remaining sedges discussed here are examples of taxa whose nomenclature and ranges have been clarified recently (C. corrugata, C. echinodes, C. opaca, C. stipata var. maxima, C. tonsa var. rugosperma, and C. tribuloides var. sangamonensis) or that have new range extensions in the state (Carex arkansana, C. socialis, C. texensis, Cyperus iria). Each sedge is discussed in conjunction with significant collections. A summary of Carex species added to the Illinois flora since Mohlenbrock's 1986 Guide to the vascular flora of Illinois is presented.


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