Japanese name: オトメアゼナ（乙女畦菜） Scientific name:Bacopa monnieri
[Overview]
A perennial found in sunny wet places such as waterways, rice paddies and marshes.
The stems creep with sparse branching and grow to about 30 cm long.
The stem tips rise obliquely.
Leaves are simple and opposite, thick, obovate-elliptic, 7–15 mm long and 3–7 mm wide.
A flower stalk 1–1.5 cm long extends from the leaf axil and bears a single flower.
The corolla is bell-shaped, about 8 mm long, 5-lobed, and white to pale purple.
The fruit is an ovoid capsule 5 mm long containing many minute seeds.
[History]
Plants introduced as ornamental aquatic plants have escaped, and their establishment has been confirmed in Okinawa.
It is designated as an alien species requiring caution.
