Teucrium canadense
from the link ☼
Perennial 1 - 4 feet tall
Flowers: June - September
Also called wood sage.
Found in moist thickets, ditches, low areas in pastures, and along streams. This member of the Mint family (square stems) forms colonies, so it is often seen in clumps. The flowers are pale-lavender or pinkish,whitish-gray on the undcovered by soft hairs. Prairie chickens will eat the nutlet seeds. It is closely related to wood sage
LucasLand fields are filled with it.