Polygonum cognatum, Meissner

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 : 77

7. P. cognatum Meissner , Monogr. Gen. Polyg. Prodr. 91 (1826)

( P. alpestre C. A. Meyer ).

Perennial, with a branched woody stock. Stems 5-30 cm, procumbent. Leaves 10-20 x 5-9 mm, oblong, subacute or mucronate. Ochreae hyaline, usually longer than internodes. Flowers solitary or in axillary clusters of 2-5; bracts as large as lower leaves. Perianth pinkish; tube at least as long as the segments, becoming hard in fruit. Nut 3 mm, glossy, included in perianth. Locally naturalized as a ruderal. [Br Bu Ga.] (S. W. Asia.)