Galeopsis bifida is an annual plant native to Europe and Asia but now found in Canada and the northeastern, midwestern parts of the United States. It has many common names such as
bifid hemp-nettle,
split-lip hemp-nettle,
common hemp-nettle, and
large-flowered hemp-nettle. The genus name means weasel-like, referring to the corolla of the flower. It is often confused with other species of Lamiaceae such as
Mentha arvensis,
Dracocephalum parviflor
(Wikipedia)