Eleocharis quadrangulata is a species of spikesedge known by the common names square-stem spikerush and four-angled spikerush. It is native to eastern and central North America, with additional popula
North America is a continent in the Northern and Western hemispheres. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Cari
A 2005 NASA satellite image of North America
European colonization of North America and the Territorial evolution of the United States by Gustav Droysen