Trifolium dubium (lesser trefoil, "Kometsubutsumekusa")

Japanese name: コメツブツメクサ （米粒詰草）
Scientific name: Trifolium dubium

[Overview]
An annual.
The stems branch well at the base and creep along the ground, extending to about 50 cm, with the upper part of the stem standing upright.
The leaves are alternate and consist of 3 leaflets; the leaflets are obovate, 0.5–1 cm long, with fine serrations along the margins.
From the leaf axils, globose racemes are produced, bearing 5–20 yellow papilionaceous flowers 3–4 mm long.
The fruit is a legume.

[History]
It is said to have already been present in Japan in the Taisho era and is now seen in various places.

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