Anthemis sterilis, Steven

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 : 150

7. A. sterilis Steven , Bull. Soc. Nat. Moscou 29(2): 379 (1856).

Perennial, perhaps sometimes biennial, with stout stock and nonflowering shoots forming dense, low cushions. Stems up to 15 cm, simple or with few branches, leafy up to about the middle. Leaves pinnatisect, glandular-punctate, very densely white-lanate at first; segments entire or 2- to 3-fid to subpinnatisect; lobes linear or oblong, obtuse or subobtuse, mucronulate. Capitula 15-20 mm in diameter. Ligules present. Involucre hemispherical- campanulate; bracts triangular to oblong, the inner with broad hyaline margin and apex. Disc 5-7 mm in diameter; florets pale yellow, the tube swollen and spongy in the lower half. Receptacle conical. Achenes 1-75-2 mm, not or very slightly ribbed, not granulate; corona 0-25-0-5 mm, white, opaque, somewhat rigid, erose-denticulate. Dry, stony places. • Krym. Rs (K).

A. tranzcheliana Fedorov in Schischkin & Bobrov, Fl. URSS 26: 866 (1961), also from Krym, is like 7 but has stems 20-40 cm, longer and wider leaves with wider segments, the capitula 30-40 mm and the disc 8-15 mm in diameter, achenes 1-75-2-5 mm, the outer with low, flat, somewhat rugose ribs and a translucent, yellowish, tubular corona 1-1-5 mm enclosing the swollen lower half of the corolla-tube.