A herb or sedge. It keeps growing from year to year. It has runners. It grows 45 cm high. The stalks are 10-30 cm long and 5-12 mm wide and triangle shaped. The leaf blades are 5-20 cm long by 2-6 mm wide. They are flat and rather thick. The bulbs are 6-10 mm across. They have a few thin scaled. The flowers are in crowded spikes.
Cormous, deciduous, erect perennial, up to 250 mm tall. Leaf blades flat, keeled, 1-2(-3) mm wide. Stem 3-angled. Inflorescence a dense, terminal cluster of spikelets, occasionally with stalked clusters added, basal bracts several, spreading or suberect, leaf-like. Spikelets 2-2.5(-3) mm wide, dark red.
Tuberous perennial to 25 cm. Spikelets dark red.