Cyperus rotundus L.  

Cyprus rotundus L., Sp. PI. : 45 (1753). Plate Cyp. 15.
Perennial sedge, up to c. 35 (-60) cm tall. Rhizome short, stoloniferous, stolons thin,
wiry, radiating out from the short rhizome and producing small, dark tubers. Culms
triangular. Leaves shorter than stems; lamina flat, up to 15 cm x3-4 mm, smooth,
keeled. Inflorescence a rather lax anthelidium; primary pedunculate rays 3-9, unequal,
each with several spikelets on a slightly elongated axis. Inflorescence bracts leaf-like, 2-
4. Spikelets narrow, compressed, up to c. 4 cm x 2-3 mm. reddish to deep brown.
Glumes ovate, boat-shaped, keeled, obtuse or acute. Stamens 3. Stigmas 3. Nuts
trigonous, c. 1.5 x 1 mm.
Saudi Arabia: Widespread. A noxious weed
Distribution:
Cosmopolitan