On the CTG episode that first aired September 19, 2009, Mae Sanchez from Barton Springs Nursery picks out drought-tough ornamental grasses and sedges.

Grasses and sedges

Blue sedge (Carex glauca)
Cherokee sedge (Carex cherokeensis)
Texas blue grass (Poa arachnifera)
Inland sea oats (Chasmanthium latifolium)
Palm grass (Setaria palmifolia)
Blue dune lyme grass  (Elymus arenarius 'Blue Dune')
Nolina lindheimeri
Nolina texana