Oze Nuphar

Oze Nuphar or Oze kohone (scientific name: Nuphar pumilum var. ozeense) is a subalpine variant of Nuphar pumilum that is endemic to Japan and grows in lowlands. It grows naturally in shallow ponds and marshes in Sorachi, Soya, and Cape Ashizuri in Hokkaido, and Gassan and Oze in Honshu. In summer, it produces five sepals that look like yellow flowers. The real flower is the smaller one inside. The flower stalk emerges above the water, the leaf stalk does not emerge above the water, and the leaves float above the water. It is a close relative of the corymb and the flowers are smaller than the corymb. The columnar head of the pistil is reddish.

Common name: Ose kouhonne, Scientific name: Nuphar pumilum var. ozeense, Origin: Hokkaido and Honshu, endemic to Japan; habitat: shallow marshes and ponds; plant height: 10 to 40 cm; leaf blade length: 8 to 15 cm; rhizome color: white; flowering season: July to August; flower color: yellow; flower diameter: 2 to 3 cm; uses: flowering leaves for viewing in ponds and aquaria, rhizome for herbal medicine.