Grows only in a wet area on the edge of a hay field/pasture. Very thick and will choke down a bush hog unless you go slow. No visible flower so I assume it's a grass. Gets about 2' tall. It's about a foot tall in the pics. It will stay submerged every Spring for a couple months and seems to stop growing but goes back to growing when the standing water dries.

got it in my pasture it sux for my little ford tractor and bush hog

Looks like Bahia grass?

Looks like a panicum species.

It's not bahia grass. Could be buffalo grass.

Hensbit

Looks like reed canary grass. I have it in a couple of spots. It will head out in the mid summer and look like fescue.

I'll try and get a better picture or two to show size. Also, it burns (when dry after poisoning with gly or bush hogging) slow and hot, with a black smoke like it is full of oil.

Got a few more pics...stuff is thick!

Moccasin grass...

That is a very fitting name if that's what it is but can't find much on a google search. Does it have another common name?

I believe it's Reed Canary Grass as AntlerHunter suggested aka ribbon grass

No that’s entirely colloquial...

I can't remember ever seeing a seed head BUT that may be because I never cared to pay much attention as it only affected a small wet area and was never a problem. Also, we mow it down once or twice a year and maybe it doesn't have a chance to seed.

It's been there my entire life and I just now got curious about it. Funny how life works.

Cogon Grass