First, some more plants in lawns: tansy, yarrow, prickly lettuce and a green flowered knotweed. Also, in Peterson’s Field Guide to Wildflowers, pigweed and lamb’s quarters are interchangeable common names. That’s the joy of common names. The scientific name is Chenopodium album.
We’re still having a slow year. Usually the leaves are well on their way to coloring up, but only a few have any color, and I think that may be due to them being stressed in some way. Perhaps the extra amount of rain has kept the trees green longer.