Schoenoplectus scirpoides (Schrad.) J.Browning

Perennial herb, 1-2(-3) m high, long-rhizomatous or tufted. Leaf blades absent. Culm scapose, terete, spongy, ± 7 mm in diam. Inflorescence pseudolateral, a compound anthela of many stalked clusters of spikelets each individually stalked. Subtending bract inconspicuous or well-developed, erect continuing line of culm, rigid with a spine-like tip, shorter or longer than inflorescence. Spikelets elliptical, 8-22 x 3-4 mm, lengthening with age. Glumes: fertile ovate to oblong-ovate, 3-4 x 2.5-3.0 mm, keel excurrent into minute recurved awn. Style branches 2. Perianth of 4 or 5 brown bristles, slightly longer than nutlet. Flowering time July. Nutlet broadly obovate, incl. beak 2.3-2.7 x 1.3-1.7 mm, plano-convex, black, surface very finely reticulate.

It is a temperate plant.