Euphorbia falcata (sickle spurge), is a species of Euphorbia, native to most of Europe, northern Africa, and Asia, and naturalised in other parts of the world.
Two subspecies are recognised:
Euphorbia falcata subsp. falcata: throughout the range of the species
Euphorbia falcata subsp. macrostegia (Bornm.) O.Schwartz: restricted to Cyprus and western Turkey