Conium (/koʊˈnaɪ.əm/ or /ˈkoʊniəm/) is a genus of flowering plants in the carrot family Apiaceae which consists of four species accepted by The Plant List. One species, C. maculatum, also called hemlock, which is highly poisonous, is native to temperate regions of Europe, North Africa and Western Asia, while the other three are from southern Africa.