Clumps densely or loosely tufted; rhizome stout, woody, long or short. Stems 30-100-(120) cm × 1.5-3 mm, rigid, often distant along rhizome. Leaves 1-2, terete like stems but shorter. Inflorescence open, irregularly branched, flowers in small clusters. Stamens usually 3 perfect and 3 aborted. Capsule c. 3 mm long, ± = tepals, dark brown, often almost black. Seeds without tails or very shortly tailed.
A rush. It is a herb.