Ottelia japonicum is an annual herb occurring in paddies,
water ditches, ponds, or the like; laying its leaves in water;
blades are 10-30cm long, 2-15cm wide, broadly lanceolate, with long
petioles, margins curling in waves. Flower stalks arise among the
leaves, and 2-3cm-in-diameter white or light red-tinged flowers are
on the water's surface. Flowers are bisexual; stamens are 3-6 in
number, styles are 6, and both are yellow. Bloom time: August to
October. |