Polygonum

R. D. Meikle, Flora of Cyprus 2. 1985T. G. Tutin, N. A. Burges, A. O. Chater, J. R. Edmondson, V. H. Heywood, D. M. Moore, D. H. Valentine, S. M. Walters & D. A. Webb, Flora Europaea 1, ed. 2. 1993
but modified
1Perennial plant with woody rootstock, sometimes even like a subshrub
1'Annual plant
2Inflorescences leafy, the flowers in small axillary clusters; leaves coriaceous
2'Inflorescences spiciform, terminal, slender, not leafy; leaves not coriaceous
3Inflorescences leafy; flowers solitary, axillary, or in small axillary clusters; bracts leaf-like, longer than the flowers
3'Inflorescences not leafy, spiciform; at least the upper bracts inconspicuous and shorter than the flowers
4Perianth pink and white
4'Perianth green, sometimes with pink or white margins