CONVOLVULACEAE

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 : 74

CXLVI. CONVOLVULACEAE 2

Herbs or shrubs. Stems often climbing. Leaves alternate, exstipulate. Flowers actinomorphic, in terminal or axillary inflorescences, sometimes solitary. Sepals 5, usually free. Corolla infundibuliform, tubular or campanulate, usually 5-lobed or -angled. Stamens 5, alternating with corolla-lobes. Ovary 1- to 4-locular, superior; ovules 1 or 2 in each loculus; style terminal. Fruit a capsule. 1 Plant a twining parasite with haustoria, not green, more or less glabrous 1. Cuscuta 1 Plant free-living, green or covered with hairs 2 Corollaupto5 mm, dividedtoabout halfway 3 Leaves sessile, lanceolate to ovate 2. Cressa 3 Leaves with long petioles, reniform to orbicular 3. Dichondra 2 Corollamorethan5 mm, scarcelylobed 4 Bracteoles broad, leaf-like, partly obscuring the sepals

4. Calystegia 4 Bracteoles lanceolate to filiform, not or scarcely obscuring the sepals 5 Stigma with 1 -3 globose lobes; pollen grains pantoporate,

spinous 6. Ipomoea 5 Stigma with 2 filiform to cylindric-clavate lobes; pollen grains tricolpate, ± smooth 5. Convolvulus