A peaceful grove.
Over the years, I realize I often find myself liking this bonsai-forest style of bonsai more than the single-tree style. I overheard one bonsai trainer say bonsai forests, including this one, are usually made quickly by buying a bunch of young trees and planting them--they're not made by buying saplings and then growing them. Thus, forests don't take the decades of investment of many single-tree bonsai.
The bonsai trainer also explained the importance of the moss to hold moisture in the soil.