biology

Ulmus szechuanica

Ulmus szechuanica 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 szechuanica rather than just read about it. In short: Ulmus szechuanica Fang, known as the Szechuan (Sichuan), or red-fruited, elm, is a small to medium deciduous Chinese tree found along the Yangtze river through the provinces of Sichuan, Jiangxi, Anhui, and Jiangsu. Description The tree can reach a height of 18 m, but is usually less than 10 m, with a spreading umbrella-like crown.

Key takeaways

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

Reference excerpt

Ulmus szechuanica Fang, known as the Szechuan (Sichuan), or red-fruited, elm, is a small to medium deciduous Chinese tree found along the Yangtze river through the provinces of Sichuan, Jiangxi, Anhui, and Jiangsu.

Description

The tree can reach a height of 18 m, but is usually less than 10 m, with a spreading umbrella-like crown. The leaves, dark red on emergence, are generally obovate < 9 cm long by 5 cm broad, borne on branchlets with an irregular corky layer. The wind-pollinated apetalous flowers are produced on second-year shoots in February, followed in March by suborbicular samarae < 16 mm long by 13 mm wide.

Pests and diseases Ulmus szechuanica was evaluated with other Chinese elms at the Morton Arboretum, Illinois, where it exhibited a resistance to Dutch elm disease. The species is eschewed by the elm leaf beetle Xanthogaleruca luteola.

Cultivation Growing best on well-drained soils, U. szechuanica is cold hardy; in artificial freezing tests at the Morton Arboretum the LT50 (temp. at which 50% of tissues die) was found to be −30 °C. However, it was also found to be comparatively weak-wooded, making it susceptible to storm damage in winter. There are no known cultivars of this taxon, nor is it known to be in commerce beyond the United States.

Hybrid cultivars U. szechuanica is believed to have been used in post-2000 hybridization experiments at the Morton Arboretum.

Accessions North America Brenton Arboretum, Iowa, US. No accession details available. Chicago Botanic Garden, Illinois, US. 2 trees, no other details available. Dawes Arboretum, Newark, Ohio, US. 2 trees, accession numbers 2001-1137.002, 2001-1137.001. Denver Botanic Gardens, US. No details available Holden Arboretum, US. Acc. nos. 96-179 (unknown provenance), 97-30 wild collected in China. Morton Arboretum, US. Acc. nos. 429–84, 53–95. United States National Arboretum Washington, D.C., US. Acc. nos. 68987, 68991, 76235, 76236, 76250, 68992. Europe Grange Farm Arboretum, Lincolnshire, UK. Acc. no. 523 Sir Harold Hillier Gardens, Hampshire, UK. Acc. no. 1994.0329, one tree, 4.4 m tall in 2008, from seed from the Shanghai Botanical Garden

Nurseries North America Sun Valley Garden Centre [3] Archived 2016-03-04 at the Wayback Machine, Eden Prairie, Minnesota, US. Europe Pan-Global Plants [4], Frampton-on-Severn, Gloucestershire, UK. Pépinière AOBA [5], Saint Ouen la Rouerie, France.

References

External links efloras.org U. szechuanica description efloras.org U. szechuanica leaves and fruit illustration (figures 7 to 11) Photographs labelled U. szechuanica on Plant Photo Bank of China, ppbc.iplant

Illustrations

Worked examples

Example 1 — a first encounter with Ulmus szechuanica

Start with the simplest possible case. Write down what Ulmus szechuanica 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 szechuanica 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 szechuanica 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 szechuanica

In research: Ulmus szechuanica 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 szechuanica 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 szechuanica is common in secondary-school and first-year university syllabi. It links to neighbouring topics Elm species and varieties, Flora of China, IUCN Red List least concern species, so understanding it makes those chapters shorter.
In everyday life: Look for Ulmus szechuanica 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 szechuanica in 20 minutes

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

Frequently asked questions

What is Ulmus szechuanica in simple terms?

Why does Ulmus szechuanica 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 szechuanica?

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 szechuanica.