biology

Ulmus lanceifolia

Ulmus lanceifolia is a biology 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 Ulmus lanceifolia rather than just read about it. In short: Ulmus lanceifolia, occasionally known as the Vietnam elm, is a very large tree endemic to a wide area of southern Asia. Its range extends southeast and eastwards from Darjeeling in the Himalaya, through Bangladesh, southern China, Myanmar (formerly Burma), Thailand, Laos, Vietnam and on discontinuously into Indonesia, straddling the Equator in Sumatra and Celebes.

Key takeaways

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

Reference excerpt

Ulmus lanceifolia, occasionally known as the Vietnam elm, is a very large tree endemic to a wide area of southern Asia. Its range extends southeast and eastwards from Darjeeling in the Himalaya, through Bangladesh, southern China, Myanmar (formerly Burma), Thailand, Laos, Vietnam and on discontinuously into Indonesia, straddling the Equator in Sumatra and Celebes.

Description Ulmus lanceifolia can reach a maximum height of 45 m, placing it on a par with the English Elm, but with pendulous branches; the bark of the trunk exfoliates in thin scales. The leaves, borne on wing-less branchlets, are narrow, generally lanceolate, < 10 × 3.5 cm, and thick. Schneider's leaf-drawing (1907) shows some 16 vein-pairs. The tree is deciduous in the north of its range, where it can occur at altitudes of up to 2500 m, but evergreen in the tropics. Given the latitudinal range, there is inevitably a substantial variation in its flowering time, beginning in October in the north, but advancing to February–March in the south. The obovate samarae are 12–30 mm long by 11–24 mm broad. Ploidy: 2n = 28.

Pests and diseases U. lanceifolia was found to be among the least suitable elms for feeding and reproduction by the adult elm leaf beetle Xanthogaleruca luteola and feeding by the Japanese beetle Popillia japonica in the United States.

Cultivation Not cold-hardy, the species is very rare in cultivation; specimens introduced to the Netherlands from the Himalaya by Heybroek in the 1960s all perished.

Accessions

Europe Grange Farm Arboretum, Lincolnshire, UK. Saplings grown from seed sent in 2013 by Xishuangbanna Tropical Botanical Garden, southern Yunnan, China. Acc. no. not known.

References

External links efloras.org: U. lanceifolia leaves and fruit illustration efloras.org: U. lanceifolia description Chinese gallery of tree, leaves and fruit photographs labelled U. lanceifolia, iplant.cn

Illustrations

Worked examples

Example 1 — a first encounter with Ulmus lanceifolia

Start with the simplest possible case. Write down what Ulmus lanceifolia claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, 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 Ulmus lanceifolia 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 Ulmus lanceifolia 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 Ulmus lanceifolia

In research: Ulmus lanceifolia appears in biology 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 Ulmus lanceifolia 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: Ulmus lanceifolia is common in secondary-school and first-year university syllabi. It links to neighbouring topics Elm species and varieties, Flora of the Northern Indochina subtropical forests, Flora of tropical Asia, so understanding it makes those chapters shorter.
In everyday life: Look for Ulmus lanceifolia 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 Ulmus lanceifolia in 20 minutes

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

Frequently asked questions

What is Ulmus lanceifolia in simple terms?

Why does Ulmus lanceifolia matter?

Because it connects several biology 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 Ulmus lanceifolia?

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 Ulmus lanceifolia.