Major flora, unfortunately now defunct.
The Useful Wild Plants (UWP) Project sets a standard for studying plant uses throughout the world. The multi-volume work titled The Useful Wild Plants of Texas, the Southeastern and Southwestern United States, the Southern Plains, and Northern Mexico is the definitive economic botany study for the southern half of the United States and northern Mexico. More than two decades of intensive interdisciplinary research have gone into the project. Nothing comparable has been done elsewhere. Researchers say similar work should be done in other regions throughout the world.