Matricaria perforata, Merat

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 : 166

5. M. perforata Mérat , Nouv. FI. Env. Paris 332 (1812)

( M. inodora L. , nom. illegit., T. inodorum Schultz Bip. ).

Annual. Stems 30-80 cm, erect or ascending, corymbosely branched above and sometimes also branching from base. Stems and leaves glabrous when mature, sometimes sparsely pubescent when young. Leaf-segments narrow and acutely apiculate, thin, not fleshy. Capitula (l-)10-200, 3-4-5 cm in diameter; ligules 1-1-8 cm; involucral bracts oblong or narrowly triangular with a narrow, colourless to dark brown scarious margin. Achenes 1 -3-2-2 x 0-5-1 - 1 mm; ribs separated by at least 0.5 of their width; resin-glands more or less orbicular or bluntly angled (but not longitudinally elongated); abaxial face blackish-brown and transversely rugose; pappus very short and truncate. 2n = 18 + 0-1 B, 36. Cultivated land, waste places and saline steppes. Most of Europe. All except Az BI Co Cr Fa Is Sa Sb Si.