Rumex thyrsiflorus, Fingerli.

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 : 85

15. R. thyrsiflorus Fingerli. , Linnaea 4: 380 (1829)

(inch R. nemorivagus Timb.-Lagr. ).

Basal leaves 3-4 times as long as wide; cauline leaves becoming progressively narrower upwards, up to 14 times as long as wide; basal lobes divergent, sometimes divided. Panicle dense, with branches repeatedly branched. Valves 2-5-3(-5) mm, cordate-reniform, sometimes wider than long, with a small deflexed tubercle near the base. Nut 1 - 8-2- 2 mm, dark brown. 2« = 14. Dry, open habitats. E. & C. Europe, extending to Denmark and the Netherlands; recently spreading as an alien into W. Europe. Al Au Cz Da Fe Ge Gr Ho Hu Ju Po Rm Rs (N, B, C, W, K, E) Su [Ga He?It No].

Flowers 2-6 weeks later than 14 in places where both grow together.