Do you mean perennial peanut?

Yes that's it.

Here's a link to the info Laura1 mentioned:

http://www.freshsod.com/ecoturf-perennial-peanut

I have this in part of my yard. It covers reasonably well and is robust to trampling. I do plan on planting more.

Thanks! I requested a quote to see what my options are.

How does the ground need to be prepared for the peanut sod? I have a good deal of weeds and random grasses in that area on top of a sloping layer of very sandy soil on top and better soil a few inches underneath.

I never knew it was used for yards. I have hundreds of acres of it around me, its baled for hay.

I saw this used as an ornamental ground cover in the Miami Beach botanical garden recently. I'd love to grow it on my swales so they don't need mowing but it seems prohibitively expensive to buy in large quantities since the plants don't give much seed so it's usually grown from cuttings. Plants were $5 each at Home Depot.

I think you'd need to buy it (as I'm looking into) from someone that could sell it as sod or in quantity 1 gallon pots.

I have hundreds of acres of it around me, its baled for hay.

I think there are different cultivars. The one used agriculturally gets quite a bit taller than the most popular ones for lawns.

I like it a lot and wish the HOA here, which wastes thousands and thousands and thousands of gallons of water on the stupid floratam we have now, would plant something like this instead, in the common areas.