Teucrium canadense var. virginicum (L.) Eaton  
Family: Lamiaceae
American germander, Virginia germander, wood sage
Teucrium canadense var. virginicum image
Etymology: Teucrium: from Teucer, "a Trojan king"
Plants: perennial forb; stems square
Leaves: opposite
Flowers: 5-parted
Fruits: 1-seeded nutlet
Conservation Status: Native
Teucrium canadense var. virginicum image
Teucrium canadense var. virginicum image
from USDA Plants website  
Teucrium canadense var. virginicum image
Teucrium canadense var. virginicum image