Invasive Alien Species

Species Name: Cyperus sanguinolentus

Family Name:
Cyperus erasgrostis (non Lamk.) Vahl
Pycreus eragrostis Palla
P. sanguinolentus (Vahl) Nees
Eastern hemisphere.
More or less tillering, annual or perennial, with short rhizome, up to 60 cm tall. Stems slender, tufted, erect or at the base reclining and rooting at the 1-4 nodes, 3-angular, smooth, up to one-third covered with straw-colored to reddish brown sheaths. Leaf blade flat or channeled in the lower one-third to one-half of the stems, 1-4 mm wide.  Inflorescence terminal, umbel-like with up to 5 cm long rays; spike ovoid, 3-18 spikelets; spikelets patent, 8-33 flowered, 5-22 x 2-3.5 mm; Involucral bracts 2-5 at the base of the inflorescence, unequal; flowers bisexual, naked. Nut smooth, biconvex, blackish brown, broadly obovate to orbicular 0.8-1.5 x 0.6- 1.3 mm .
Invaded Habitat:
Swamps, soggy grasslands, rice fields and tidal rice fields.
Throughout Indonesia.
Wet, open places, up to 3 000 m altitude; locally abundant.
  1. Backer , C. A. & R. C. Bakhuizen Van Den Brink.  1965.  Flora of Java. N.V. P. Noordhoff. Groningen, Netherlands
  2. Soerjani, M.,  A. J. G. H. Kostermans & Gembong Tjitrosoepomo (Eds.).  1987.  Weeds of Rice in Indonesia. Balai Pustaka. Jakarta