Callitriche truncata, Guss.

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 : 124

2. C. truncata Guss. , Pl. Par. 4 (1826).

Leaves widest at base and tapering towards apex, or more or less elliptical, shallowly emarginate or truncate. Styles patent or deflexed, deciduous. Fruit 1-1-2 x 1-3-1-6 mm, wider than long, subsessile or stalked; mericarps not or only narrowly winged. • S. & W. Europe, northwards to England; S.E. Russia. Be Br?Co Ga G r Hs It Ju Lu Rs (E) Sa Si. 1 Mericarps semicircular, unwinged; fruit subsessile; leaves often slightly elliptical (c) subsp. occidentalis 1 Mericarps reniform, narrowly winged; fruit stalked; leaves tapering from base to apex

2 Wing of mericarp composed of 1-3 rows of polygonal cells

(a) subsp. truncata 2 Wing of mericarp consisting of a whitish, ciliate border, formed by the radial walls of the cells (b) subsp. fimbriata