905 Sisymbrium officinale (L.) Scop.

This species presumably originates from S. and SE. Europe, N. Africa and SW. Asia. It has then been widely spread to other parts of Europe and, among other places, C. and S. Africa, Japan, N. and S. America, Australia and New Zealand. The present distribution is incompletely circumpolar (Hultén, Circumpol. Il, p. 262 and map 253).