804 Petrorhagia prolifera (L.) Ball & Heyw.

Syn.: Tunica prolifera (L.) Scop., Kohlrauschia prolifera (L.) Kunth

This partly anthropochorous species was originally restricted to parts of Europe. It occurs as a casual in outlying localities and is widely spread, for instance to N. and S. America, S. Africa, Australia and New Zealand. The closely related P. nanteuilii (Burn.) Ball & Heyw. is also mapped.