Ajuga, a group of herbs used for ground cover; bugle
Any of the aromatic herbs in genus Lycopus, especially Lycopus virginicus, water horehound
Ajuga, a genus of herbaceous flowering plants in the mint family Lamiaceae, with most species native to Europe, Asia, and Africa; also, specifically
Diphasiastrum complanatum (syn. Lycopodium complanatum) (northern running-pine), a species of clubmoss native to dry coniferous forests throughout the holarctic region.
Lycopodium obscurum (princess pine), native to eastern North America
Lycopodium clavatum (stag's-horn clubmoss, running clubmoss)
Ajuga chamaepitys (yellow bugle), native to Europe, the eastern part of the Mediterranean, and North Africa