Also available to read online:
http://books.google.com/books?id=pnnHgcasN-cC&pg=PR23&lpg=PR23&dq=online+library,+Edible+and+Useful+Plants+of+Texas+and+the+Southwest&source=bl&ots=Vm-SpTHgRt&sig=TUKDTwT3Uo6D61kzWA9MPz0ZKvQ&hl=en&ei=NrO6SaS3GIuUMv7G-ZcI&sa=X&oi=book_result&resnum=4&ct=result

---------

Scooter Cheatham's Useful Wild Plants Project
and 12 Volume Set titled,
The Useful Wild Plants of Texas, the Southeastern and Southwestern United States, the Southern Plains, and Northern Mexico.

Here's his website:

http://www.usefulwildplants.org/index.htm

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.

Our first goal is to complete and publish a comprehensive 12-volume encyclopedia that describes over 4,000 Texas plants, discusses in detail their past, present, and future value, and provides color photographs and distribution maps for each species. Due the the tireless efforts of many professionals and lay volunteers Volume 1 and 2 are available now and Volumes 3 through 6 are ready to be printed as soon as funding is obtained. Volumes 7 through 12 are partially finished. Plans for future information output call for an interactive database available by subscription, a CD-ROM version of the multi-volume work, and on-site land use consultation. The project is being done under the auspices of The Useful Wild Plants, Inc., a 501(c)(3) non-profit organization.