Carex nudata

California black flowering sedge
California black flowering sedge

Native to below the high water mark along perennial water courses. Forms a bright green, dense, arching mound with interesting black flowers in spring. Best in moist soils, full sun to light shade. 1 - 2 1/2 ft. tall and wide. Lovely yellow fall color in colder locations. Winter deciduous. Beautiful in containers too. Deer resistant.