science

Nymphaea × marliacea

Nymphaea × marliacea 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 Nymphaea × marliacea rather than just read about it. In short: Nymphaea × marliacea is an invasive artificial waterlily hybrid of Nymphaea mexicana, Nymphaea alba and or Nymphaea odorata. It has been naturalised in Australia, New Zealand, North America, and Europe.

Key takeaways

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

Reference excerpt

Nymphaea × marliacea is an invasive artificial waterlily hybrid of Nymphaea mexicana, Nymphaea alba and or Nymphaea odorata. It has been naturalised in Australia, New Zealand, North America, and Europe.

Description

Vegetative characteristics Nymphaea × marliacea is a perennial, aquatic, rhizomatous, herb with large, branching, stoloniferous, horizontal, 35 mm wide rhizomes. The glabrous, suborbicular floating leaf with a deep basal sinus is up to 20 cm wide. The leaves can extend beyond the water surface under crowded conditions. The upper leaf surface shows a reddish brown marbled pattern, and the lower leaf surface displays purple spotting. The glabrous petiole reaches lengths of over 1 m.

Generative characteristics The large, often fragrant, diurnal, white, or faintly pink or yellow, up to 20 cm wide flowers float on the water surface or extend beyond it. The peduncle may reach lengths over 1 m. The flower has four sepals. The androecium consists of 50 stamens. Flowering occurs from May to October.

Reproduction It is a (generally) sterile hybrid. It can reproduce vegetatively through stolons.

Taxonomy It was described by Joseph Bory Latour-Marliac in 1888. The taxon authority appears to be disputed. Some sources give Joseph Bory Latour-Marliac as the taxon author, while others give William Wildsmith, or William Watson as the taxon author. However, W. Watson credited Joseph Bory Latour-Marliac with the name and its description, and therefore the name should be assigned to Latour-Marliac. Nymphaea × marliacea has not been typified. It is placed in the subgenus Nymphaea subg. Nymphaea.

Etymology The hybrid name marliacea refers to the French horticulturist Joseph Bory Latour-Marliac (1830-1911).

Hybridisation A genetic analysis indicates it is closer to Nymphaea alba than to Nymphaea odorata. A genetic analysis of ISSR data suggests that Nymphaea × marliacea, together with Nymphaea alba, forms a separate group from Nymphaea mexicana, Nymphaea odorata, and Nymphaea tetragona. The Nymphaea × marliacea-group is subdivided into two subgroups: Nymphaea × marliacea 'Chromatella' and Nymphaea × marliacea 'Albida' together with Nymphaea alba.

Distribution It has been introduced to Australia, the United Kingdom, Italy, Spain, Hungary, Malta, Canada, the USA, and New Zealand.

Invasiveness In Victoria, Australia it is regarded as somewhat invasive and it shows a slow dispersal rate. Naturalised Nymphaea × marliacea plants grow vigorously and can cover almost the entire surface of ponds. The naturalised plants appear to be planted deliberately and may not be able to disperse by themselves. Small populations may be eradicated through the removal of the rhizomes, but larger populations may require repeated mowing with specialised boats.

Habitat It has been found growing in ponds, lakes, and canals.

Ecology It is a host plant to the phytopathogenic fungus Rhamphospora nymphaeae.

Cultivation It is one of the most commonly cultivated hybrids. It is a cold-hardy plant with vigorous growth. It grows well in 0.5–1.5 m deep ponds.

References

Illustrations

Worked examples

Example 1 — a first encounter with Nymphaea × marliacea

Start with the simplest possible case. Write down what Nymphaea × marliacea 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 Nymphaea × marliacea 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 Nymphaea × marliacea 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 Nymphaea × marliacea

In research: Nymphaea × marliacea 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 Nymphaea × marliacea 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: Nymphaea × marliacea is common in secondary-school and first-year university syllabi. It links to neighbouring topics Interspecific plant hybrids, Nymphaea, Plants described in 1888, so understanding it makes those chapters shorter.
In everyday life: Look for Nymphaea × marliacea 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.

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How to study Nymphaea × marliacea in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Nymphaea × marliacea 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 Nymphaea × marliacea out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Nymphaea × marliacea in simple terms?

Why does Nymphaea × marliacea 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 Nymphaea × marliacea?

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 Nymphaea × marliacea.