Delineation of Schoenoplectus Sect. Malacogeton (Cyperaceae), New Combination, and Distinctions of Species

Abstract

The new section, Schoenoplectus sect. Malacogeton (Ohwi) S. G. Smith & Hayasaka, is recognized and a description of the section is provided. Schoenoplectus nipponicus, Sch. etuberculatus, Sch. torreyi and Sch. subterminalis are included in sect. Malacogeton, and a key to these is given. We recognize the sections Schoenoplectus, Actaeogeton, Malacogeton and Supini in the genus Schoenoplectus, and a key to the sections and a list of North American and East Asian species included in each section are provided.