Moss is one of the lowliest members of the plant kingdom. It is more than twice removed from its cousins, the more complex, vascular plants like the geranium or impatient.
Because it has no true root systems, moss just clings to the dirt hoping not to be stepped on, too much.
While many gardeners fertilize and coo over their annuals, they shun the moss, asking many an online forum how to kill it.
However, many are rediscovering the beauty of moss. Turning it not away, but into a supporting role on flower pots. Martha Stewart has been covering her terra cotta with moss patches, and so have the people at HGTV.