Achillea clavennae, 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 : 161

11. A. clavennae L. , Sp. Pl. 898 (1753).

More or less sericeoustomentose. Stems up to 40 cm, simple, erect or ascending. Leaves pinnatifid, the lobes few, mostly entire, obtuse; basal leaves up to 8cm, long-petiolate; cauline c. 2x1 cm, sessile. Corymbs with 6-25 capitula; peduncles 5-20 mm. Involucre 4-6(-8) mm in diameter; bracts 3-5 mm, ovate, obtuse or acute, with a wide, brown margin. Ligules 4-6 mm, ovate, white. 2л = 18. Mountain rocks. • Alps, eastwards from 9° E.; mountains of W. halfof Balkan peninsula. Al Au Ge Gr He It Ju?Rm.

The considerable variation in density of indumentum and size of inflorescence does not seem to warrant formal recognition at present.