Teucrium spinosum, L.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1972, Flora Europaea. Volume 3. Diapensiacea to Myoporaceae, Cambridge: Cambridge University Press : 132

16. T. spinosum L. , Sp. Pl. 566 (1753).

Pubescent or villous, glandular annual. Stems 30-50 cm, much branched, the branches spinose and more or less leafless at flowering time. Lower leaves oblong, narrowed at base, incise-serrate above; upper leaves small, entire. Flowers solitary or 4-6 together in the axils of the distant upper leaves. Calyx 6-7 mm, weakly veined; upper tooth broadly ovate, the others 2-2-5 mm, narrowly triangular to subulate, all spinescent. Corolla 6-8 mm, white, resupinate; tube included in the calyx. Cultivated fields and sandy or gravelly ground. W. Mediterranean region, S. Portugal. Hs It Lu Sa Si.