Cyperus serotinus, Rottb.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1980, Flora Europaea. Volume 5. Alismataceae to Orchidaceae (Monocotyledones), Cambridge: Cambridge University Press : 287

15. C. serotinus Rottb. , Deser. Icon. Rar. Pl. 31 (1773)

( Pycreus serotinus (Rottb.) Hayek ).

Perennial; rhizomes long; stems 30-120 cm, solitary. Leaves 4-10 mm wide, subequalling to exceeding the stems. Bracts 3-5, exceeding the inflorescence. Inflorescence a compound umbel; rays 5-10, up to 15 cm. Spikelets 5-20(-30) x 2-3-5 mm, lanceolate or oblong-lanceolate, with 8-30 flowers, patent. Rhachilla not winged. Glumes 2-2-5 x 1 -5-2 mm, broadly ovate to orbicular, obtuse, reddishbrown, with a greenish centre and a wide hyaline margin. Stamens 3. Nut | as long as to subequalling the glumes, dark brown or black. S. & E. Europe. Al Au Bu Co Ga fHe Hs Hu It Ju Lu Rm Rs (C, W, E) Tu.