This little legume is Slender Bush Clover, Lespedeza virginica. Normally it has more leaves and is a good healthy green. We can always use more legumes to improve the soil.
Yesterday evening, out walking on the land, I spotted a tall, sturdy forb with white flowers just opening on its top. This one I was able to figure out for myself. In my old Peterson field guide to wildflowers, its common name is given as Late-flowering Thoroughwort. Its botanical name is Eupatorium serotinum.
You can just see the little "threads" from the few florets completely open, which will make this a "mistflower" when it's in full bloom. I'm hoping for butterflies, and I'd like more of this one, too.
The land looks a lot greener, a week after the rain.