White sweetclover, Melilotus alba
This is not a native, but because it is extremely common, I am including it here. I heard at a field day that “supers go on when you see yellow sweetclover and you stop adding supers when you see white sweetclover.” This alludes to the bloom time of white sweetclover coming after yellow sweetclover. The idea behind “stop adding supers” is that the bees will have less choices about where to work, therefore they will finish working what is left (and hopefully filling and capping all the available cells).
The blue-green lobed leaves are good identifiers.