I have a couple of tiny bits of lawn and this spring a mystery grass has popped up which I don't care for. Anybody recognize it? Any suggestions?

Is there a white center line? Not clear to me, but Looks like Ornithogalum, a weedy bulb. Just a possibility.
The thread "Weedy bulbs!" in Plant ID forum

SallyG, thanks. I'll look more closely, AND your question prompted my brain to remind me that I have a plant-id app on my phone! Let's see what I find out. I'll get back to you.

In my yard

Oh, yeah. Now I recall that they had little flowers last year! I suppose I can opt to transplant them out of my lawn to the edges of a garden or something.

Some find these too weedy, as in appearing in new places too readily. The ones I show here are near trees and tend to dry up too fast to get very pretty. Others in more shade and better moisture bloomed prettier. Still others are being crowded out by creeping rudbeckia like perennial.