Dear Pete, Hope that address disapears soon. In the mean time,
here's a link to the City of Austin Grow Green program. It's a
database of the best plants for this area with excellent photos. Just
remember that Austin straddles two or three different ecosystems so
you need to pick the right tree for the soil and moisture in your
area.

http://www.ci.austin.tx.us/greengarden/plantlist.htm