Sparganium emersum, Rehmann

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1980, Flora Europaea. Volume 5. Alismataceae to Orchidaceae (Monocotyledones), Cambridge: Cambridge University Press : 274-275

3. S. emersum Rehmann , Verb. Naturf. Ver. Brünn 10, Abh.\ 80 (1871)

( S. diversifolium Graebner , S. simplex Hudson ).

Stem 20-60 cm, erect or floating. Leaves both erect and floating, triangular in transverse section, sheathing but not inflated at base. Inflorescence simple. Lower bracts longer than the inflorescence,

erect. Female capitula 3- 6, remote, the lower often pedunculate. Male capitula 3-10, distinct, remote, all borne on main axis. Fruit ellipsoid, often pedicellate; style straight. 2n = 30. Much of Europe, but absent from many of the islands and parts of the Mediterranean region. Al Au Be Br Bu Cz Da Fe Ga Ge Hb He Ho Hs Hu It Ju Lu No Po Rm Rs (N, B, C, W, E) Sa Si Su.