Anthemis ruthenica, Bieb.

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 : 153

28. A. ruthenica Bieb. , FI. Taur.-Cauc. 2: 330, 465 (1808).

Lanate to pubescent annual. Stem 10-50 cm, frequently branched from the base. Leaves oblong, 1 - to 2-pinnatisect; lobes triangular, acute. Capitula 15—35(—40) mm in diameter; peduncles not davate in fruit. Involucral bracts more or less lanate, the outer lanceolate, acute, the inner oblong, obtuse, with a wide hyaline margin and apex. Ligules 8-17 x 3-7- 5 mm. Receptacle in fruit up to 9 x 3-5 mm, very acute; scales oblanceolate to obovate-cuneate, lacerate or dentate at apex, acuminate. Corollatube strongly swollen and spongy below the middle in fruit. Achenes 1 - 5-2 mm; achenes of outer tubular florets subcylindrical, usually not more than | as wide as long, with rather thick, obtuse ribs and obtuse, but not thickened rim slightly higher or with a short auricle on the adaxial side. 2n = 18. Dry places and cultivated ground. E. C. & S.E. Europe. Au Bu Cz Ge?Gr Hu Ju Po Rm Rs (C, W, K) Tu.