It's related to dayflower - a commelina, I believe...

Thanks. I have also the commelina. Dissimilar.

Look for blooms in the AM. If they are really small, compare to C. diffusa. If that is not it, please add a pic of a bloom to this discussion when you find one.

In your area, you might also encounter Tripogandra.

Also compare to Japanese stiltgrass.

Thanks. None of those.

Flowerless. Our key to this is going to be the rippling which is not a broad irregular waviness, rather has the tight regularity of a washboard.

There are several commelinas that are considered weeds here in FL - perhaps benghalensis?

https://edis.ifas.ufl.edu/publication/AG230

P.S. I've also seen that growing here in W Central FL.

Thanks. Nope.

Oplismenus hirtellus ssp. undulatifolius, Commelinids

AKA wavy leaf basketgrass. And it looks a LOT like stiltgrass with wrinkles.

Wow, Jay nailed it with railroad spikes.

Update : More likely ssp. setarius which is native. So, although not nailed, the right track, equally good.

Four, I think I'm wrong about the subspecies. Well, there aren't any reports of undulatifolius occurring in Florida on I naturalist. That ssp. occurs in Mexico and the Caribbean. There are other subspecies occurring in Florida, hirtellus and imbecillus. Oplismenus hitellus. It has cool looking grass flowers. I was thinking it was a dayflower at first also. I was hiking in the woods recently and got all excited, because I thought I stumbled upon some native Commelina erecta. When I returned later I realized it was really some look alike grass species. 😪 My Deer Tongue Grass, Dichanthelium clandestinum looks very Commelinaish.😂

You have the live specimen so you can have fun, and work out which subspecies

Subspecies setarius www.plantasdeaquario.com/site/FotoMax/PC815a%20412.jpg

Oplismenus undulatifolius is an invasive species that has a presence all over the southeast so very skeptical of any reports of it "not occurring".

I'm puzzled why there aren't any I nat observations? I must have read a very old report. Thanks for clarifying gardengal. I see it is invasive in the southeast.

I see Oplismenus undulatifolius recorded in Maryland, Virginia and Georgia, but nothing for Florida, but it's probably there by if it's in Georgia.

Oplismenus setarius as four stated.

Just want to say I have a love/hate relationship with this ground cover. It was the only thing that would grow on my sloping front yard, and came up every year, so I decided to put some into the courtyard. Well, the soil in the courtyard is much more fertile, and it went wild! I realized that the only reason it didn't go wild on the slope was that it was constantly mowed. Couldn't mow in the courtyard, so it just went crazy, climbing into everything. I'm still fighting it in there after four years. I hear it makes a lovely hanging basket, but I wouldn't recommend letting it go to seed anywhere in your yard, unless you have a large wild area that you want to cover quickly.

So, it can root at the nodes, like the Asiatic dayflower? That would be a problem for any plants in the vicinity. Miniature strangling figs.