Cannabis sativa, L.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1964, Flora Europaea - Volume 1. Lycopodiaceae to Platanaceae, Cambridge University Press : 67

1. C. sativa L. , Sp. Pl. 1027 (1753).

Stems up to 2- 5 m. Leaves usually alternate, except the lower, 3- to 9-palmatisect; lobes lanceolate, acute, serrate. Nut smooth, not articulated at the base. 2« = 20. Native on alluvial sands in S.E. Russia; widely cultivated for its fibre, oil and narcotic resin, and naturalized in a large part of Europe; a frequent casual elsewhere. Rs (E) [Au Be Bu Co Cz Ga Ge Gr He Hs Hu It Ju Po Rm Rs]. (5. <£ W. Asia.)

C. ruderalis Janisch. , Ucenye Zap. Gos. Sar. Univ. 2 (2): 14 (1924), which is found as a weed of cultivated fields in S.E. Russia (and in C. Asia), is said to differ in its smaller size, and its nut with a marbled surface, distinctly articulated at the base and easily detached.