Name: Michele Roth N.E. Indiana - Zone 5b, and F (Zone 9b) I'm always on my way out the door..
I think those yellow blooms might be Canada Lettuce, but I'm not sure. I usually try to get them before they bloom, but not this year. Heaven forbid they ever set seed; I can't get rid of the ones I have now! I have stopped obsessing over them though, which is a very good thing. One of these days I'll end up getting enough of the other plants moved out of there that I can mow that area like lawn, but in the meantime I've learned acceptance. I did get most of them pulled (temporarily) yesterday, so that should get me through another year's bloom cycle.
A definite departure from what's usually shown...but here's a few pictures of those bigger, taller areas that somehow seem to look okay; even when they're past due for cleanup.