Upright green sedge resembling an Umbrella Palm, but this one is hardy. Likes regular water if placed in sun. 2-3 feet tall. The nigra in the name refers to the black flowerheads. The green blades of this sedge grow to 2 feet tall.
Flowers are black and showy.
Like the others sedges, this prefers plenty of water, and would be an excellent addition to the edge of the pond, or in the shallow end of the water. This deciduous sedge spreads by underground stems to form non-invasive colonies. Prefers light shade and moist soil. Elymus arenarius Blue Lyme Grass. Steely blue blades that droop to form a graceful mound.