118306 BLACK BOG-RUSH Schoenus nigricans Height to 50cm. Tufted perennial with rigid, smooth, round stems. Grows in bogs, dune slacks and marshes, usually on base-rich soils. Flowers are dark brown spikelets, in a terminal head, with a leaf-like bract (May-July). Fruits are whitish. Leaves are long, green, arising at base of plant. Commonest in N and W Britain, and Ireland