I haven't seen any fruit, so I'm guessing I'm too late in the season. I'm hoping they're strawberry plants though. What do you think? My woods are loaded with these.
You haven't missed the fruit -- it hasn't "been" yet, since the plant is still flowering. (Remember the flowers are what turn into the fruit. Well more or less, let's not critique my botanical summary here <g>)
It could be strawberry I guess. (Wild strawberries usually live more in sunny meadowy situations than in woods, though, unless these are very sunny open woods).
However if those are little prickles or thorns I see on the stems there, then it is, instead, something in the genus Rubus (blackberries, raspberries, etc). There are a variety of low creeping somewhat strawberry-leaved Rubus-es and I honestly don't know which ones live in PA so I can't suggest species. Some have basically edible berries, some have nonpoisonous but nonworthwhile berries.
Easiest thing: wait til they fruit and you will be easily able to tell whether the fruit is strawberrylike or bramble-berry-like.
This may sound silly. Are they low to the ground? There is a wild rose that grows like that. I have seen them when we are riding. Sometimes the flower is pink sometimes white. Not sure what you have.
I'll have to double check tomorrow. I didn't notice any barbs when I was holding the plant still to look at it, so maybe they're just hairs. They're under 6 inches tall and there's tons. Yes, the woods are open and very sunny (in the rare event we GET sun, it's rained here all but 3 days since we moved)