From Mike McKinley (in Austin TX) on Facebook, this plant appreciation:
Texas is justly famous for its wildflowers. Spring here is really gorgeous as it’s the time of year when everything is green, lush and cool. We have a wealth of lovely wildflowers, but this one has been my favorite since I was a kid and it’s called blue-eyed grass. It’s very small and grows in small isolated clumps, so you never see it covering a field. It’s subtle and tasteful.
The species pictured is either S. angustifolium, Narrowleaf blue-eyed grass, or S. montanum, Common blue-eyed grass, both of which are common in Texas. (Someone with better botanical knowledge than I have could surely identify the species.)