How stupid can I get?

So I was cleaning out my flowerbed, and I was musing about all these little shoots of weeds I don't recognize from last year.

Hmmm. Those little shoots look familiar. In fact, they look an awful lot like . . . like . . . like the little shoots I see under my maple trees.

That grow from the little "helicopter" seeds that the maple trees drop.

The helicopter seeds that were abundantly mixed with grass clippings when we mowed the lawn the last time in the fall.

The grass clippings that I spread on the flower bed for mulch.

DUH!!!!!!