Galium album subsp. album

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 : 24

(a) Subsp. album ( G. erectum Hudson 1778 , non 1762, G. mollugo subsp. erectum Syme ): Stems up to 150 cm, often slender, predominantly glabrous, procumbent to erect, the non-flowering branches long or short. Leaves 10-30 x 1-5-5 mm, oblanceolate, gradually narrowed towards apex. Inflorescence broadly ovoid or oblong. Corolla whitish. 2л = 44. Throughout the range of the species.