Here in the new house, I've been bemoaning the lack of mallow weeds in the yard. I have bitter greens (dandelion and sow thistle), sour greens (wood sorrel), and delicate greens (chickweed, and lots of it!), but I didn't have anything I recognized that was a good sturdy, bland green to use as a salad base.
Meanwhile, this other weed was springing up back there and I watched it grow larger and larger, always wishing that I knew what it was. Well, it has finally flowered, and the flowers gave me a clue! They looked like Chenopodium. A little research confirmed that I've got Chenopodium album, aka Lamb's quarters!
I'm eating a salad with them this very moment. Cool.