4. Eleocharis palustris (L.) Roem. & Schult., Syst. Veg. 2: 151. 1817; R.R.Stewart, l.c. 94; Kukkonen in Rech.f., l.c. 59.
Scirpus palustris L., Sp. Pl. 1: 47. 1753; E. crassa Fisch. & Mey. ex Zinserl. in Fl. URSS, 3: 582. 1935; E. crassa Fisch. & C.A.Mey. ex Becker in Bull. Soc. Moscou 31(1): 75. 1858. nom. nudum. E. kitamurana T. Koyama in Acta Phytotax. Geobot. 17: 48. 1957; Strandhede & Dahlgren in Bot. Not. 121: fig. 2. 1968.
Tufted perennial, to 100 cm. Rhizome horizontal, c. 2 mm diam., aerial stem arise just at or near the nodes. Stem 1.5-2.5 mm diam., green or greyish green, with 12-28 vascular bundles in cross section. Open sheaths c. 10 mm; lower closed sheaths soon disintegrating, mouth oblique; upper to 200 mm, mouth straight, margins scarious. Spike elongate ellipsoid or ovoid, acutish, with more than 50 glumes; 2 basal glumes sterile, mostly equal, 1.4-2.5 mm, central part green, margins widely scarious, apex rounded; glumes cymbiform, narrow, mid-nerve not reaching rounded or acutish apex, margins scarious. Perianth bristles of equal legth, equalling nut (incl. stylopodium), light brown; stamens 3; stigmas 2. Nut globose, ovoid or obovoid, glossy, finely or obscurely reticulate; stylopodium c. as high as wide, mitriform, sides convex, whitish or brownish, reticulate or trabeculate, distinctly constricted from nut.
Lectotype: “Hispania. 36. Loefling (=Iberian. Penins., Loefling 36) selected by Strandhede (in Bot. Notiser 13: 168. 1960).
