I thought this was one of the numerous crabgrasses, but apparently it is tall fescue (Festuca arundinacea). The crabgrass seed heads, as far as I can tell, all have that distinctive splayed-tines formation, while these stay quite close to the stem. Yes, that's my shovel at the bottom of the photo! it's a weed in our yard.
The seedlings of crabgrass and fescue look remarkably alike.
