Texas is a large state in the southern U.S. with deserts, pine forest and the Rio Grande, a river that forms its border with Mexico. It is the second largest state in the United States by both area and population. Geographically located in the south central part of the country, Texas is nicknamed the ''Lone Star State'' to signify its former status as an independent republic, and as a reminder of the state's struggle for independence from Mexico. The "Lone Star" can be found on the Texan state flag and on the Texan state seal. The origin of the state name, Texas, is from the word, "Tejas", which means 'friends' in the Caddo language.