biology

Ulmus wallichiana subsp. xanthoderma

Ulmus wallichiana subsp. xanthoderma 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 wallichiana subsp. xanthoderma rather than just read about it. In short: The elm Ulmus wallichiana subsp. xanthoderma was identified by Melville and Heybroek after the latter's expedition to the Himalaya in 1960. The tree is of more western distribution than subsp. wallichiana, ranging from Afghanistan to Kashmir.

Key takeaways

Ulmus wallichiana subsp. xanthoderma 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 wallichiana subsp. xanthoderma to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Ulmus wallichiana subsp. xanthoderma from memory before moving on to harder problems.

Reference excerpt

The elm Ulmus wallichiana subsp. xanthoderma was identified by Melville and Heybroek after the latter's expedition to the Himalaya in 1960. The tree is of more western distribution than subsp. wallichiana, ranging from Afghanistan to Kashmir.

Description A deciduous tree growing to 30 m with a crown comprising several ascending branches. The bark of the trunk is pale grey, coarsely furrowed longitudinally. The branchlets become orange- or yellow-brown, glandular at first, not hairy. The leaves range from 5.6–14 cm long by 3–7.5 cm broad, elliptic-acuminate in shape, and with a glabrous upper surface, on petioles 7–10 mm long. The inflorescence is slightly glandular, almost glabrous. The samarae are orbicular to obovate, with a few glandular hairs; the seed central.

Pests and diseases The tree has a high resistance to the fungus Ophiostoma himal-ulmi endemic to the Himalaya and the cause of Dutch elm disease there.

Cultivation There are a few trees planted in England and The Netherlands. It is not known in North America or Australasia.

Accessions

Europe Grange Farm Arboretum, Lincolnshire, UK. Acc. no. 643 (Heybroek's clone P296). Wijdemeren City Council Elm Arboretum, 1 tree planted Brilhoek, Nederhorst den Berg 2019, tree number: 112793

References

Illustrations

Worked examples

Example 1 — a first encounter with Ulmus wallichiana subsp. xanthoderma

Start with the simplest possible case. Write down what Ulmus wallichiana subsp. xanthoderma 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 wallichiana subsp. xanthoderma 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 wallichiana subsp. xanthoderma 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 wallichiana subsp. xanthoderma

In research: Ulmus wallichiana subsp. xanthoderma 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 wallichiana subsp. xanthoderma 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 wallichiana subsp. xanthoderma is common in secondary-school and first-year university syllabi. It links to neighbouring topics Elm species and varieties, Plant subspecies, Trees of Afghanistan, so understanding it makes those chapters shorter.
In everyday life: Look for Ulmus wallichiana subsp. xanthoderma 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 wallichiana subsp. xanthoderma in 20 minutes

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

Frequently asked questions

What is Ulmus wallichiana subsp. xanthoderma in simple terms?

Why does Ulmus wallichiana subsp. xanthoderma 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 wallichiana subsp. xanthoderma?

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 wallichiana subsp. xanthoderma.