Common Name : Variable flatsedge Family : Cyperaceae Habit: An annual sedge, sometimes behaving as a perennial, varies in height from 6-80 cm. Stem: Smooth, triangular, slightly winged and 0.7-3.0 mm thick. The roots are numerous, fibrous and reddish. Leaves: Smooth, (or slightly scabrid on the midrib and margin), flat, linear, 5-25 cm long or often twothirds of the plant height, 2-6 mm wide, sometimes reduced to sheaths. Sheaths are tubular, united, green to reddish-brown and without leaf blades at the base. Flowers: Inflorescence consists of dense, globose, umbellate heads, simple or compound, 5-15 mm in diameter, with 10-60 stellately spreading spikelets. Fruits: Nutlets, 0.6-0.8 mm long and 0.3-0.4 mm wide, triangular, obovate-elliptic, yellowish-brown or pale-brown, minutely papillose.