biology

Ulmus castaneifolia

Ulmus castaneifolia 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 castaneifolia rather than just read about it. In short: Ulmus castaneifolia Hemsley, the chestnut-leafed elm or multinerved elm, is a small deciduous tree found across much of China in broadleaved forests at elevations of 500–1,600 metres (1,600–5,200 ft). Description The tree can reach a height of 20 metres (66 ft) with a trunk of about 0.5 m d.b.h.

Key takeaways

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

Reference excerpt

Description The tree can reach a height of 20 metres (66 ft) with a trunk of about 0.5 m d.b.h. The bark is thick with a pronounced corky layer, and is longitudinally fissured. The branchlets are devoid of the corky wings common to many elms. The leaves are generally narrow, ranging from obovate to elliptic, up to 15 cm long, and densely hirsute when young. Schneider's leaf-drawing (1907) shows a longish petiole. The perfect wind-pollinated apetalous flowers are produced on second-year shoots in February; the samarae are mostly obovate < 30 × 16 mm, with seed close to the apex.

Pests and diseases Ulmus castaneifolia is resistant to Dutch elm disease and to elm leaf beetle Xanthogaleruca luteola.

Cultivation The species is very rare in cultivation; it was one of 12 Chinese species under evaluation at the Morton Arboretum, Illinois, in 2009 by the late Dr George Ware. In artificial freezing tests at the arboretum, the LT50 (temperature at which 50% of tissues die) was found to be −26 °C. There are no known cultivars of this taxon, nor is it known to be in commerce.

Notable trees The UK TROBI champion grows at Calderstones Park, Merseyside. Another of similar dimensions grows at the Royal Botanic Gardens Kew, planted in 1973.

Accessions North America Chicago Botanic Garden, US. Planted in West Collections Area. Denver Botanic Gardens, US. Acc. details not available Morton Arboretum, US. Acc. no. 46–95. obtained from Yunnan Province, China. University of British Columbia Botanical Garden, Vancouver, British Columbia, Canada. Acc. no. 027099–0437–1989, (as U. multinervis). United States National Arboretum, Washington, D.C., US. Acc. nos. 76219, 68914. Europe Calderstones Park, Merseyside, UK. TROBI Champion, 13 m high, 45 cm d.b.h. (2011). Grange Farm Arboretum, Lincolnshire, UK. Acc. no. 698. Hortus Botanicus Nationalis, Salaspils, Latvia. Acc. no. 18149 (as U. multinervis W. C. Cheng), from Beijing. Royal Botanic Gardens, Kew, UK. Acc. no. 1973–11726 Sir Harold Hillier Gardens, UK. Acc. no. 1994.0327, area PC 700, origin not disclosed. Strona Arboretum, University of Life Sciences, Warsaw, Poland, (as Ulmus multinervis). Wijdemeren City Council, Netherlands. Elm Arboretum, 2 planted Overmeerseweg, Nederhorst den Berg in 2015.

References

External links U. castaneifolia description, Flora of China, vol.5 p.8, efloras.org U. castaneifolia fruit and leaves illustration, Flora of China, efloras.org Photographs labelled U. castaneifolia on Plant Photo Bank of China, ppbc.iplant U. castaneifolia description, and photographs labelled U. castaneifolia, ulmen-handbuch.de

Illustrations

Worked examples

Example 1 — a first encounter with Ulmus castaneifolia

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

In research: Ulmus castaneifolia 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 castaneifolia 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 castaneifolia 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 castaneifolia 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 castaneifolia in 20 minutes

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

Frequently asked questions

What is Ulmus castaneifolia in simple terms?

Ulmus castaneifolia Hemsley, the chestnut-leafed elm or multinerved elm, is a small deciduous tree found across much of China in broadleaved forests at elevations of 500–1,600 metres (1,600–5,200 ft). Description The tree can reach a height of 20 metres (66 ft) with a trunk of about 0.5 m d.b.h.

Why does Ulmus castaneifolia 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 castaneifolia?

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 castaneifolia.