Leonotis leonurus, also known as wild dagga and lion's ear, is a plant species in the mint family Lamiaceae. It is a broadleaf evergreen shrub, native to South Africa, where it is very common, with a wide altitudinal range from 5 m up to 1980 m. It is known for its medicinal properties. The main psychoactive component of Leonotis leonurus is hypothesized to be related to the presence of leonurine or labdanes; Leonotis leonurus has been confirmed to contain leonurine according to peer reviewed journal published phytochemical analysis. Like other plants in the mint family, it also contains marrubin. The word "dagga" comes from Afrikaans, and derives in turn from the Khoikhoi "dachab". The word "dagga" has been extended to include cannabis in Afrikaans and South African English, so the use of "wild" serves to distinguish Leonotis leonurus from this.

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