Notes For Reference:-

Species, Varieties, or Forms in the Genus Diodia:

Diodia teres / Oofutabamugura
Diodia virginiana / Merikenmugura

Diodia virginiana / Merikenmugura メリケンムグラ

Diodia virginiana, a native of North America, inhabits moist/damp sections of riverbanks or ridges between paddies. Stems branch out on all sides at the base, forming mats, and leaves are opposite, broadly linear, with deep green, somewhat leathery surfaces. Flowers are white, emerging from leaf axils, and cylindrical, with four lobes at the tips. Blooming time: June-August.