Abstract
Eleocharis palustris (Linnaeus 1753: 70) Roemer & Schultes (1817: 151) belongs to the Eleocharis Brown (1810: 224) subser. Eleocharis (Bureš et al. 2004). In Europe (see Walters 1980, Jiménez-Mejías & Luceño 2011, Pignatti 2017), two subspecies are widely accepted and reported: E. palustris subsp. palustris and E. palustris subsp waltersii Bureš & Danihelka (2008: 227) [≡ E. palustris subsp. vulgaris Walters (1949: 194), nom. illeg.].