Oak Sedge, Carex pensylvanica
 
Oak Sedge is a soft-flowing sedge that can be grown as a modern, stylish-looking sedge lawn. It is a perfect groundcover, filling in empty spots in a woodland garden. Oak sedge spreads slowly by rhizomes but is not aggressive. It brightens shady areas with its light-green foliage. The white flower spikes that bloom in May create a unique sight.  
 
Ecology:
Oak sedge provides soft landings for caterpillars dropping from their host tree. It also keeps the soil covered, cool, and moist, and birds feed on the seeds.
 
Growing conditions:
Found in mixed forests, often in oak forests, it prefers drier soils and partial shade. It requires well-drained soils and doesn't do well in heavy, compacted clay. In the garden, it is a tough plant that can grow in partial sun to full shade, in average to dry soil.