Polygonum, (Miller) DC. Perennial

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1964, Flora Europaea - Volume 1. Lycopodiaceae to Platanaceae, Cambridge University Press : 80

Sect. Bistorta (Miller) DC. Perennial herbs with short, stout rhizomes. Ochreae brown, not lacerate. Flowers in fairly dense terminal spikes. Perianth petaloid; stamens 6-8; styles 3, long and slender; nut trigonous.