Trifolium campestre, Schreber

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1981, Flora Europaea. Volume 2. Rosaceae to Umbelliferae, Cambridge University Press : 166

44. T. campestre Schreber in Sturm, Deutschl. Fl. Abt. 1, Band 4, Heft 16 (1804)

( T.procumbens L. , nom. ambig.).

Annual; stems up to 3O(-5O) cm, hairy, erect or ascending. Leaflets 8-10 mm, obovate, the terminal one petiolulate. Stipules semiovate, dilated and rounded at the base. Heads up to 15 mm, dense, 20- to 30-flowered; pedicels i as long as the calyx-tube. Upper calyx-teeth as long as or shorter than the upper limb of the calyx-tube; lower calyx-teeth 1-2 times as long as the lower limb of calyx-tube. Corolla (3-)4-5(-6) mm, yellow; limb of standard broadly cochleate, sulcate. Legume 3-6 times as long as the style. In = 14. Dry, grassy places. Throughout Europe except the extreme north and east. All except Is Rs (N) Sb; introduced in Fa Fe.

Variable in habit and size. T. pumilum Hossain , Notes Roy. Bot. Gard. Edinb. 23: 479 (1961), from the Aegean region (Amorgos), described as being similar to 46, appears to be a small variant of 44.