Japanese name: オオフタバムグラ（大双葉葎） Scientific name:Diodia teres
[Overview]
An annual 10–50 cm tall, found in somewhat dry places such as sandy ground on seashores and riverbeds, and roadsides.
The stem usually stands upright, branches from the plant base, and is densely hairy.
The leaves are simple and opposite, broadly linear to linear-lanceolate, 1–4 cm long and about 0.2–0.4 cm wide, stalkless, rough with short hairs, and have marginal hairs.
The stipules of opposite leaves are fused together and deeply split into several needle-like segments.
The flowers are usually borne singly in the leaf axils, pale pink to white; the corolla is tubular, 3 mm long, with a 4-lobed tip.
The fruit consists of mericarps, borne two at a time.
[History]
It was identified in 1927 in the suburbs of Tokyo, and is now naturalized in the Kanto region and westward.
