Pictures borrowed from the Internet
This is one of the many flowers I remember most outside my great grandmother's house. She planted it--oddly--in the cracks of a cement walk-way that leads to her front door. Every year this flower bloomed without her having to replant it. It just simply showed up in mid to late spring, creating a bouquet of color we'd have to step around or walk over. It mostly blooms in warm humid, tropical-like weather. It's pretty tenacious and comes in a beautiful variety of colors. My favorite is the coral and deep oranges. My gr. grand tended to favor the reds and purples--the latter was sometimes a rare. The leaves are succulent--probably why rose moss blooms best in a humid climate. My Auntie pinches the dry leaves and puts them back into the soil. This may be why it comes back each year. I'm not sure.
I've had it before and it did well, but I've switched pots and uprooted plants, replanted plants, we've since taken out a huge dead tree stump I planted flowers in, including the rose moss---so I've had to purchase it again (unlike Dear), but I can't plant today. It's raining, yet again against a warm climate.
This is what Wiki had to say
Another Wiki take on Rose Moss