Sure, if you can digest cellulose... AFAIK you'll get no energy value from eating grass stems. I suspect seeds are edible, of course - it's grain. But your question has me wondering if there are any useful trace nutrients that one could ingest from drinking an infusion made from macerated grasses.

"Grass" covers a pretty wide range of things, of course... rye to bluegrass to gamma grass to... corn, I think. And probably some things with a common name that includes the word "grass" even though the plant isn't really a grass. Is lemon grass a grass? (Don't confuse me with sedges - yet.)

Any botano-nutritionists here? I thought this was a silly question at first, but upon reflection, I think it probably has some interesting answers.

Dang! I wouldn't have thought to ask this question...

Tom

Edit: a hint of some answers here: http://www.motherearthnews.com/arc/675/