On the other hand, there is a weed that's popping up all over my garden that I've a feeling might be edible, but I'm not sure what it is. That is, I think I saw a picture of it in a discussion of edible weeds, not just that I had a hunch!
Consulting my general purpose book on wild things, I identified this as hairy bittercress, described as,
An attractive common weed,which sounds about right. The name is somewhat misleading, as the hairs are so tiny they're almost invisible and it's not really very bitter. It is, however (further research revealed) edible, and tastes similar to watercress. Excellent! I have loads of the stuff.
I harvested some for dinner, together with what ground elder I could find, a few young leaves of rose bay willow herb (said by some to taste like asparagus, but I think they're confusing sparrow-grass with ordinary grass; it tastes of nothing much) and sorrel. I cooked these in milk for a few minutes, then added flour and butter to thicken, and cheese to make sauce.