odd little plant in my moss gdn
This little creeper showed up in my Japanese garden this spring. It grew among my polytrichum which I had sown from the woods, but has spread across the other mosses, too. It has leaves like a tiny nasturtium, but split like a waterlily's. It has flowers like a watercress, white and the size of a pinhead. The leaves are about 1/2" avg.
Any ideas what it might be?
Here is a link that might be useful: odd weed