Chamomilla suaveolens, (Pursh) Rydb.

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 : 167

3. C. suaveolens (Pursh) Rydb. , N. Amer. FI. 34: 232 (1916)

( Matricaria matricarioides (Less.) Porter pro parte).

Stems (2-)8-45 cm, erect or ascending, ratherfleshy, branched above and often also from the base; branches rigid, glabrous below, sometimes sparsely pubescent below the capitulum. Leaves 2-6 x 1-2 cm, rather crowded, glabrous; segments numerous, flattened, acute and aristate. Peduncles 0-2-3 cm; capitula 5-40(-300), 5-9(-12) mm in diameter, enlarging as they mature; involucral bracts with a colourless margin. Florets all tubular, 4-lobed, greenish; corolla 1-1—1 -4 mm. Achenes 1 -2-1-5 mm, pale brown, with 3-4 ribs on the ventral face; pappus a short membranous rim. 2n= 18. Farmyards, roadsides and cultivated ground. Widespread in Europe but absent from much of the south. [Au Be Br Bu Cz Da Fa Fe Ga Ge Hb He Ho Hu Is It Ju Lu No Po Rm Rs (N, B, C, W, E) Su.] (N.E. Asia, 4 W. North America.)