Classification
Class
Magnoliopsida Brongn.
Order
Poales Small
Family
Cyperaceae Juss.
Genus
Cyperus L.
 Nomenclature
Scientific Name:
Cyperus polystachyos Rottb. (1773)
Synonymy:
  • ≡ Pycreus polystachyos (Rottb.) P.Beauv. (1816)
 Description

Densely tufted annual to perennial. Stems to 50 cm tall, 3-angled, leafy at base. Leaves < stems, 2–3 mm wide, smooth; sheaths purple-brown, sometimes with a few transverse septa. Involucral bracts 3–6, leaf-like, > inflorescence. Inflorescence capitate or with rays to 4 cm long. Spikelets ± stiffly erect in rather dense clusters, narrow-linear, acute, ± 15 × 1.5 mm. Glumes ± 2 mm long, densely imbricate, membranous, subobtuse, chestnut or straw-coloured with green keel. Stamens 2. style-branches 2. Nut ± ½ length of glume, oblong, compressed-biconvex, brown.

[From: Healy and Edgar (1980) Flora of New Zealand. Volume 3 as Cyperus polystachyos Rottb.]

 Biostatus
Exotic
 Bibliography
2010: Flora of China (Acoraceae through Cyperaceae). Wu, C.Y.; Raven, P.H.; Hong, D.Y. (ed.) Flora of China. Vol. 23. Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis.
Dai, L.-K.; Tucker, G.C.; Simpson, D.A. 2010: Pycreus. In: Flora of China (Acoraceae through Cyperaceae). Vol. 23. In: Wu, C.Y.; Raven, P.H.; Hong, D.Y. (ed.) Flora of China. Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis.
Govaerts, R.; Simpson, D.A.; Bruhl, J.J.; Egorova, T.; Goetghebeur, P.; Wilson, K. 2007: World checklist of Cyperaceae, sedges. Kew Publishing, Royal Botanic Gardens, Kew. [as Pycreus polystachyos (Rottb.) P.Beauv.]