The native peoples were well aware of the toxic effects of cow parsnip. Common names for the genus or its species include hogweed and cow parsnip. Cow parsnip is a tall herbaceous plant reaching heights of over . However, cow parsnip has large, broad leaves and an unpleasant odor. Cow parsnip has the characteristic flower umbels of the carrot family (Apiaceae). Cow parsnip is a valuable pasture plant for cows, sheep, and goats.