Cyperus rotundus L.

Common Name : Purple nutsedge
Family : Cyperaceae

HABIT

A PERENNIAL SEDGE.

STEMS

HARD, FRAGRANT, GLOBOSE-OVOID TUBERS, UP TO 1.2 CM LONG AND 0.3-0.7 CM IN DIAMETER; CULMS SOLITARY OR FEW TOGETHER, SPARSELY TUFTED, ERECT, 10-75 CM TALL, 3-ANGLED AT TOP.

LEAVES

NARROWLY LINEAR, SHORTER OR LONGER THAN STEM, 0.4-0.8 CM WIDE, DARK GREEN ABOVE, PALE BENEATH.

FLOWERS

INFLORESCENCE A SIMPLE OR COMPOUND UMBEL, RAYS 2-8, EACH UP TO 7.5 CM LONG, BEARING SHORT SPIKES OF 3-10 SPREADING, RED-BROWN SPIKELETS.

FRUITS

NUTS OBLONG TO OVATE-OBLONG, 3-SIDED, 1.3-1.5 MM LONG AND 0.5-0.7 MM WIDE, MATURING BROWN.