Katie Ruellia would be my pick if I had pavers with a sunny location.
I do all my own landscaping. Here's what part of our front yard looked like in 2008. As you can see, the St. Augustine grass in this part of the yard is weak due to constant shade and foot traffic. I got all these sandstone slabs for $50 (that's cheap) since my neighbor never used them and was moving to another town. The landscaping was nice, but a bit austere for my tastes. I wanted some green in between the stones.
It's 2011 and I still have lots of shade in this part of the yard. So I've waited for the rare, shady natives to show up. After 3 years, I'm finally seeing a lot more green.
These are all native grasses that can stand foot traffic. They're tough little plants!
You would think from these close ups that the wait is over and that all is green between the stones.
Look! Even some moss has taken hold. It's starting to look like a miniature Japanese garden.
But the wait is not over.
As I back up the camera, you can see that native plants have take over about 40%.
And even less in the larger areas. But gardeners have a lot of patience when it comes to these things.
All of these plants are self-seeding and there's one thing I'm certain about Mother Nature - she abhors a vacuum!
While I continue to wait, the flat stones look just fine with gravel. The most unusual aspect in all this is the fact that so many insects are found in this 'barren' landscape. Even some tiny, native ants have moved in.
In fact, it's a very busy place when you look closely!
Any native ant is a good guy since they fill all the niches and leave nothing for the imported fire ants.
Most are harmless like sugar ants and don't even sting.
Thanks for stopping by and I hope this gives you some ideas.