Echinochloa oryzicola ("Tainubie")

Japanese name: タイヌビエ （田犬稗）
Scientific name: Echinochloa oryzicola

[Overview]
An annual about 0.4–0.9 m tall, found mainly in rice paddies.
The stem is erect.
The leaves are linear, 10–30 cm long and 0.8–1.5 cm wide, with slightly thick margins and no ligule.
A flower spike 10–15 cm long densely bears many pale green spikelets.
The spikelets are ovate, 4–5 mm long, with awns that are absent or short.
The first glume is slightly longer than half the spikelet.

[Notes]
It has become a serious weed of rice paddies.

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