I think I have rock soapwort plants. A friend gave me some plants and they spread like crazy. She cannot remember the name but I have researched it. They are even growing between sidewalk cracks and gravel driveway. Super easy to grow and the deep red ruffled leaves are pretty when all else is green. The tallest is about 12".

If you want any of them, I would like to trade for any of your heirloom seeds (Mike's)
Dark Green zucchini squash '13 MIKES
Melon - Rocky Ford Green Flesh melon '13 Mikes
Pepper anaheim Chili ' 13 Mikes
Bush Beans Golden Wax (Mikes)
Watermelon. Black Diamond - (Mike's) '12
Dianne