Lycopodium obscurum, commonly called rare clubmoss, ground pine, prince’s pine or princess pine, is a North American species of clubmoss in the family Lycopodiaceae. It is a close relative of other treelike Lycopodium such as L. dendroideum and L. hickeyi. It is native to the eastern United States and southeastern Canada from Georgia to Minnesota to Nova Scotia. It grows in the understory of temperate coniferous and deciduous forests,