Sounds like Nut Sedge to me. A lovely plant which I have to thank my neighbors for....and my township's free compost. Here is a link that describes it

http://ohioline.osu.edu/hyg-fact/4000/4010.html

This weed which looks just like grass is fine and delicate. It is one of the first grasses to come up in the spring. As soon as temps rise the grass goes yellow. It is easily taken out in clumps as if one would be peeling away a carpet. It is very invasive. If I were to take it out right now, I would have many bare patches in my very small area of lawn. What type of weed is this and how can I get rid of it.
I live in Washington DC

Take a look at Japanese stilt grass and see if it matches. If it does, very little kills it except glysophate(Round Up). You have to pull it up by hand.If it doesn't match, go to Rutger's Website and I believe there is a weed photo gallery there...this response is probably too late.