I just discovered the coolest volunteer plant growing in my back flowerbed
where I've also let some tall wild grasses naturalize. I looked through my
Texas wildflowers book and checked out some native grasses websites, but
can't find a match. I've posted a picture of it here.

Can anyone tell me what it is or anything about it?

Thanks!
Teri
http://raifordmultimedia.com/garden/mystery_plant05.jpg