Achillea millefolium subsp. millefolium

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 : 163

(a) Subsp. millefolium :

Leaves more or less pubescent; ultimate segments of upper leaves ovate to lanceolate. Involucre 3-4 x 2-3 mm; bracts with a pale to dark brown margin. Ligules usually white. 2л=54. Throughout the lowland range of the species.