Galium debile, Desv.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1976, Flora Europaea. Volume 4. Plantaginaceae to Compositae (and Rubiaceae), Cambridge University Press : 21

15. G. debile Desv. , Obs. Pl. Angers 134 (1818)

( G. krymense Pobed. ).

Stems (10-)20-60(-80) cm, more or less erect, smooth or somewhat retrorsely aculeolate on the 4 distinct, often whitish angles. Middle cauline leaves (7-)15-25(-30) x (O-5-)O-8-2(-3) mm, in whorls of 4-6, linear to linear-lanceolate, somewhat acute, erecto-patent or deflexed; margin usually revolute and smooth or slightly rough. Inflorescence many-flowered, more or less divaricately branched; partial inflorescences more or less glomerate; pedicels 2-4 mm, more or less convergent in fruit. Flowers (3-)4-merous. Fruit 2-3-5 mm, distinctly tuberculate. 2л = 24. Marshes. S. & W. Europe, northwards to S. England. Al?B1 Br Bu Co Cr Ga Gr Hs It Ju?Lu Rm Rs (K) Sa Si Tu.