Polycarpon tetraphyllum (four-leaved allseed, "Yotsubahakobe")

Japanese name: ヨツバハコベ
Scientific name: Polycarpon tetraphyllum

[Overview]
An annual 5–15 cm tall, found on sandy ground in harbors and along railway lines.
The stem branches well from the base and spreads along the ground.
The leaves are simple, 4 in a whorl or opposite, obovate, 3–10 mm long.
Dichasial cyme-like inflorescences at the stem tips bear many white flowers about 2 mm long.
The corolla is 5-lobed, and the tips of the lobes are notched.

[History]
First collected in Kobe in 1939.

[Notes]
The Japanese name comes from the leaves growing 4 in a whorl, which distinguishes it from other Hakobe species.

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