Miner's lettuce, Chickweed, Dandelions, Oyeye Daisies, Purple Deadnettle and Sheep Sorrel.
I like to chop the Dandelions up and marinate them a bit in a fresh vinaigrette before tossing them in with the other greens for a salad, sandwich filler or omelet. It cuts down on the bitterness.  And matinating the Purple Deadnettle as well will make them less fuzzy and more pleasant to eat.  The other greens mentioned are fine as is.
And always pick them well away from any roadways or high traffic areas where people or dogs may be peeing on them, or lawns that are not known to be organic, and give them a good rinsing, like anything else that is fresh and unprocessed.