Achillea ageratum, L.

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 : 164

42. A. agératum L. , Sp. Pl. 897 (1753).

Stems 10-80 cm, erect, simple or branched, woody at base, hirsute. Leaves up to 5 x 1-2 cm, glabrous or hirsute, glandular-punctate; middle and upper cauline plane, simple, serrate, obtuse, sessile; basal more or less pinnatifid, petiolate. Corymbs with 15 to many capitula; peduncles 1-5 mm. Involucre c. 3 mm in diameter; bracts c. 2 mm, ovate, subobtuse, with a more or less scarious margin. Ligules c. 1 mm, yellow. 2л =18. Dampplaces. W. Mediterranean region, Portugal. BI Co Ga?Gr Hs It?Ju Lu Sa [Rm].