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Nuphar japonicum is a perennial herb inhabiting shallow
ponds or swamps; the underwater leaves are long, narrow, and
membraneous. The ones above the water are in the long-oblong shape,
20-30cm long. Long flower stalks emerged from rhizomes set single,
bowl-like, 4-5cm-in-diameter flowers on their tops; petal-like
sepals are 5 in number, yellow, which turn green after flower. The
petals are in the shape of an oblong, half the height of the sepals,
bending outwards. Bloom time: June-September. |
Wild plants in and around Shimane
島根とその周辺の野生植物
