Texas is the 'Lone Star State' of America. The nickname refers to the Texan state flag that bears one single star – symbolizing the fact that Texas was a sovereign state from 1836 to 1845. The Texans fought hard for their independence from Mexico, to whom they belonged until then. In the beginning of 1845, however, the Republic of Texas was annexed by America and integrated as the 29th state into the American federation.
The Texan state quarter bears the outline of Texas, the mentioned nickname, and the lone star. The design is circled by a lasso, the typical work tool of a Texan cowboy.