Callitriche cophocarpa, Sendtner

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1972, Flora Europaea. Volume 3. Diapensiacea to Myoporaceae, Cambridge: Cambridge University Press : 125

7. C. cophocarpa Sendtner , Veg. Südbayerns 773 (1854)

( C. polymorpha Lönnr. ).

Floating rosettes with 10-18 slightly rhombic or elliptical leaves; in terrestrial form, leaves elliptical. Disc of cauline hairs orbicular, of 8—12(—15) cells. Flowers solitary. Pollen-grains shortly ellipsoid or subglobose. Styles erect, often persistent. Fruit 0-8- 1-2 x 0-9-1 - 1 mm, suborbicular or slightly oblong, brown, moderately deeply grooved between the parallel mericarps; mericarps unwinged, sometimes weakly keeled, with distinct but obtuse margin. 2/2= 10. Slow-moving water. Most of Europe, except the south-west and most of the islands. Al Au Be Br Bu Cz Da Fa Fe Ga Ge He Ho Hu It Ju No Po Rm Rs (N, B, C, W, K, E) Su.