Q: What is this invasive grass? I am unable to find a seedhead. 

A: It is tough to identify grassy plants by characteristics other than a seedhead. You have to observe the grass’s awns, ligules, auricles, and collars. Those plant parts are beyond most gardener’s ability to identify. The only way I am reasonably confident that grass identification is when I see the seedhead. If you want to learn the specifics of grass identification, see http://bit.ly/GAgrassid.