Calystegia sepium, (L.) R. Br.

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 : 78

2. C. sepium (L.) R. Br. , op. cit. 483 (1810)

( Convolvulus sepium L. ).

Glabrous or pubescent. Stems strongly twisting and climbing. Leaves more or less sagittate; sinus with divergent sides. Peduncle without a narrow, répand wing. Bracteoles 10-30 x 5-20 mm, not or scarcely overlapping, the sides not closely investing the calyx, acute or rarely subobtuse at the apex, flat or keeled at the base. Corolla 30-70 mm, white or pink. Stamens 15-30 mm; anthers 4-6-5 mm. 2« = 22. M ost o f Europe except the extreme north. All except Fa Is Rs (N) Sb.

1 Corolla white (a) subsp. sepium 1 Corolla pink

2 Leaf-sinus rounded (d) subsp. spectabilis 2 Leaf-sinus acute

3 Glabrous; leaf usually shortly acute at the apex; corolla usually pale pink (a) subsp. sepium 3 Stem, petiole and peduncle often pubescent; leaf usually tapered to a long-acute apex; corolla bright pink

4 Stamens 17-25 mm (b) subsp. roseata 4 Stamens 25-34 mm (c) subsp. americana