science

Nuphar japonica

Nuphar japonica is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Nuphar japonica rather than just read about it. In short: Nuphar japonica, known as East Asian yellow water-lily, is a perennial, aquatic, rhizomatous, herb in the family Nymphaeaceae native to Japan, Korea, and Russia. Nuphar japonica is one of three species in the genus Nuphar that is dispersed in the same geographical location of the Saijo Basin, an area in the Hiroshima Prefecture of Japan.

Key takeaways

Nuphar japonica belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Nuphar japonica to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Nuphar japonica from memory before moving on to harder problems.

Reference excerpt

Nuphar japonica, known as East Asian yellow water-lily, is a perennial, aquatic, rhizomatous, herb in the family Nymphaeaceae native to Japan, Korea, and Russia. Nuphar japonica is one of three species in the genus Nuphar that is dispersed in the same geographical location of the Saijo Basin, an area in the Hiroshima Prefecture of Japan.

Description

Vegetative characteristics Nuphar japonica is a perennial, aquatic, rhizomatous, herb with 1–3 cm thick rhizomes. The leaves are submerged, floating, or emerged. The leaf blade is 12–35 cm long, and 6–18 cm wide. The terete petiole is 3–10(–14) mm wide.

Generative characteristics The yellow to red, solitary, 4–5 cm wide flowers have a long, cylindrical peduncle. The flowers have five sepals and 10–18 petals. The gynoecium consists of 15–16 carpels. The 2–3.5 cm long, and 1.6–2.3 cm wide, urceolate, green, long-necked fruit bears ovoid seeds.

Cytology The chromosome count is 2n = 34.

Taxonomy It was published by Augustin Pyramus de Candolle in 1821. It is placed in the section Nuphar sect. Nuphar.

Natural hybrids Nuphar × saijoensis (Shimoda) Padgett is a natural hybrid between Nuphar japonica and Nuphar pumila.

Etymology The specific epithet japonica means of Japan.

Phytochemistry N. japonica contains the alkaloids nupharidin, 1-desoxynupharidin, nupharamine, methyl and ethyl esters of nupharamine. The fruits also contains the alkaloids (0.06%) nupharine, beta-nupharidin, desoxynupharidin. In the rhizomes are found the steroid sitosterol, alkaloids acids, higher fatty acids (palmitic, oleic acid) and the ellagitanins nupharin A, B, C, D, E and F.

Ecology

Habitat It occurs in lakes, ponds, and streams.

Use It is grown as an ornamental plant in aquaria, as well as in ponds.

See also List of freshwater aquarium plant species List of the vascular plants in the Red Data Book of Russia

References

Illustrations

Worked examples

Example 1 — a first encounter with Nuphar japonica

Start with the simplest possible case. Write down what Nuphar japonica claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Nuphar japonica before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Nuphar japonica ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Nuphar japonica

In research: Nuphar japonica appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Nuphar japonica in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Nuphar japonica is common in secondary-school and first-year university syllabi. It links to neighbouring topics Angiosperm stubs, Aquatic plants, Flora of Japan, so understanding it makes those chapters shorter.
In everyday life: Look for Nuphar japonica outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Nuphar japonica” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Nuphar japonica in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Nuphar japonica means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Nuphar japonica out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Nuphar japonica in simple terms?

Why does Nuphar japonica matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Nuphar japonica?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Nuphar japonica.