Callitriche hamulata, Kutz. ex Koch

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

10. C. hamulata Kütz. ex Koch , Syn. FI. Germ. 246 (1835).

Usually robust. Submerged leaves linear, with expanded, deeply emarginate apex; floating rosettes with elliptical or slightly obovate leaves; in terrestrial form, leaves elliptical, dark green. Disc of cauline hairs orbicular, of 10-15 cells. Pollen-grains globose. Styles deflexed, appressed to sides of fruit. Fruit 1 -2-1-5 x 1 -4 mm, suborbicular, subsessile or sometimes (in terrestrial form) very shortly stalked; mericarps narrowly winged. 2/2 = 38,?40. Base-poor, cool, flowing water and lakes.? • N. W. & C. Europe, extending eastwards to Finland and Latvia and southwards to Italy. Au Be Br Bu Cz Da Fa Fe Ga Ge Hb He Ho Is It No Po Rm Rs (B) Su.