Try telling that to my 65 acres of the Northeast Texas Piney Woods...
Yeah, I always find it amusing when I talk to people that get their image of Texas from spaghetti westerns (movies).
A large part of Texas is desert, but the part that isn't desert is bigger than most other states. Even if you remove the plains of north Texas and the coastal scrub of south Texas, the hill country and east Texas have a huge amount of heavily forested areas.