Japanese name: カヤツリグサ（蚊帳吊草） Scientific name:Cyperus microiria
[Overview]
An annual 30–50 cm tall, found in fields and vacant lots.
The stems grow in tufts and are triangular in cross section.
A few leaves grow at the base; they are linear, 0.2–0.3 cm wide.
At the stem tip it produces branches bearing spikelets, and the base has long leaf-like bracts.
The spikelets are yellow to yellowish brown, flat and linear, about 0.7–1.2 cm long and 0.2 cm wide.
The axis bearing the spikelets and the central axis of the spike-like florets have narrow wings.
The midrib of the scales is green and projects at the tip into a small point.
The fruit is about 0.1 cm long and has 3 ridges.
[Notes]
The Japanese name comes from the children's game of splitting the stem to make a square and hanging it up like a mosquito net.
