Vincetoxicum N. M. Wolf

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 : 71

6. Vincetoxicum N. M. Wolf 1

Rhizomatous herbs or small shrubs, often with more or less twining shoot-apices. Leaves opposite, shortly petiolate, the lower suborbicular, the upper lanceolate. Flowers in axillary, few-flowered cymes. Corolla contorted in bud; lobes patent at anthesis. Corona single, the segments not awned, connate at least at base by a more or less folded or toothed membrane; lobes 5, fleshy, flat. Pollinia pendent. Follicles usually fusiform, smooth.

In the descriptions, leaf-characters refer to middle leaves, and peduncle-lengths to upper inflorescences.

Literature: A. Borhidi & S. Priszter, Acta Bot. Acad. Sci. Hung. 12: 241-254 (1966). R. Ross, Acta Bot. Neerl. 15: 161 (1966). H. P. Fuchs, Verh. Naturf. Ges. Basel 72: 343-349 (1961).

1 Leaves grey-tomentose; corona-lobes stipitate 1. canescens 1 Leaves glabrous to velutinous; corona-lobes sessile 2 Corolla-lobes with straight hairs on upper surface 3 Corolla10 -12 mm indiameter,thelobeslanceolate 2. speciosum 3 Corolla5 -8mm indiameter,thelobes± ovate 4 Corolla dark purple 5 Peduncles 5-10 mm; leaves 5-7 x 2-3 cm 3. nigrum 5 Peduncles 10-50 mm; leaves 9-13 x 4-8 cm 4. scandens

4 Corolla greenish-yellow 6 Peduncles 5-10 mm 5. huteri 6 Peduncles 12-30 mm 6. juzepczukii 2 Corolla-lobesglabrousor withcurvedhairsonuppersurface 7 Corolla white or yellow 11. hirundinaria 7 Corolla dark purple or brownish 8 Stems twining; corolla dark purple 7. rossicum 8 Stems not twining; corolla brownish 9 Peduncles 10-20 mm; corolla 5-6 mm in diameter 8. schmalhausenii 9 Peduncles 0-5 mm; corolla 8-10 mm in diameter 10 Corolla-lobes brown on both surfaces 9. fuscatum 10 Corolla-lobes greenish-brown above, yellow with brown margins beneath 10. pannonicum