This grass was really pretty. My photograph doesn't really do it justice. GL gave me all sorts of options but I would definitely say some sort of Stipa or Needlegrass. Mexican Feather Grass was another option.

This is the best I could come up with: Stipa capillata is a perennial bunchgrass species in the family Poaceae, native to Europe and Asia. Wikipedia
Scientific name: Stipa capillata, Higher classification: Needle grasses