Japanese name: コゴメガヤツリ（小米蚊帳吊） Scientific name:Cyperus iria
[Overview]
An annual 20–60 cm tall, found in rice paddies and vacant lots.
The stems grow in tufts and are triangular in cross section.
The leaves are linear, 0.2–0.6 cm wide.
At the stem tip it produces 3–5 branches bearing spikelets, and the base has 2–3 long leaf-like bracts.
The spikelets are yellowish, flat and linear, about 0.5–1 cm long and 0.2 cm wide, and resemble grains of rice.
The axis bearing the spikelets and the central axis of the spike-like florets have almost no wings.
The midrib of the scales is green and projects slightly at the tip.
The fruit is about 0.1 cm long and has 3 ridges.
