This is coming up in my moss. The blades are only 3" tall and it is flowering now in May. It looks to be a miniature grass. Can anyone help me out with an ID?

It looks very much like a 'weed' I have, which also grows in poor areas with moss. Luzula campestris ..

http://www.thewildflowersociet...

http://en.wikipedia.org/wiki/L...

Check which species you have for your location, there's photos at the bottom of the page.

http://luirig.altervista.org/f...

I agree, it does look like Luzula campestris which is found in some of the northern U.S. states: https://plants.usda.gov/core/p...

More images for comparison:

http://www.lawnsciencesouthman...

http://www.plant-identificatio...

http://www.naturespot.org.uk/s...

http://www.wildlifetrusts.org/...

Luzula multiflora ssp. multiflora looks good ..

http://science.halleyhosting.c...

I checked other species in PA, this seems to be the only one it could be. There's no entries here:

Common woodrush (Luzula multiflora subsp. multiflora)

You are so right. Thanks for the help ♥