Notes For Reference:-

Species, Varieties, or Forms in the Genus Nymphoides:

Nymphoides coreana / Himeshiroasaza
Nymphoides indica / Gagabuta
Nymphoides peltata / Asaza
　

Nymphoides indica / Gagabuta ガガブタ

Nymphoides indica is a perennial that grows in a pond or marsh, with a long and narrow stem rooting in the mud on the bottom of the water, and the leaf, orbicular-ovate, 7-20cm in diameter, floating on the water surface. The flower bud emerges from an axil beneath the leaf and opens on the water's surface. The white flower (corolla), measuring approximately 1.5cm across, has a yellow center portion, and the other part features long white hairs. Bloom time: July-September.