biology

Ulmus laevis var. celtidea

Ulmus laevis var. celtidea 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 laevis var. celtidea rather than just read about it. In short: Ulmus laevis var. celtidea Rogow. [: like Celtis, the leaves] is a putative variety of European White Elm first described by Rogowicz, who found the tree in 1856 along the river Dnjepr near Chernihiv in what is now northern Ukraine. The type specimen is held at the National Herbarium of Ukraine.

Key takeaways

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

Reference excerpt

Ulmus laevis var. celtidea Rogow. [: like Celtis, the leaves] is a putative variety of European White Elm first described by Rogowicz, who found the tree in 1856 along the river Dnjepr near Chernihiv in what is now northern Ukraine. The type specimen is held at the National Herbarium of Ukraine. The variety was first named as Ulmus pedunculata var. celtidea. Litvinov (1908) considered it a species, calling it Ulmus celtidea Litv., a view not upheld by other authorities. Similar trees were later found near Briansk in Oryol Oblast, but featured larger leaves.

Description The leaves are oblong-lanceolate, but only about 25 millimetres (1 in) in length, long-acuminate at the apex, and coarsely, sharply serrate, cuneate and sub-equal at the base. The samarae were also notably smaller than the species. A 1906 herbarium specimen (leaves and fruit) in the Berlin Botanical Museum labelled U. celtidea Litv., from Orel province, Russia, has, however, leaves to 2 or 3 inches.

Cultivation One specimen which grew at the Strona Arboretum, University of Life Sciences, Warsaw, Poland, (as Ulmus celtidea Litv.) died circa 2006. The tree was grown from seed collected from a tree at the Arboretum of the Forest-Technical Academy in St. Petersburg in 1961; it is not known whether this source is still alive. No cultivars or hybrid cultivars are known.

Accessions

North America Morton Arboretum Archived 2011-07-23 at the Wayback Machine, US. Acc. no. 1302-27 Grafts (6) from Arnold Arboretum of Harvard University (received as Ulmus laevis var. celtidea).

Europe Royal Botanic Gardens Wakehurst Place, UK. Acc. no. 1973-21047, as Ulmus laevis var. glabra obtained from a grafted tree grown at Kew now lost; provenance notes of the latter have not survived either.

Synonyms Ulmus celtidea: Litvinov, Schedae. Herb. Fl. Ross., vi. 167, 1908. Ulmus pedunculata var. celtidea. Rogow. 1856. Ulmus effusa Will. f. celtidea Rogow. (?) Ulmus pedunculata (: laevis) var. glabra: Trautvetter, Bulletin de la Classe physico-mathématique de l'Académie impériale des sciences de Saint-Pétersbourg, xv. 349 1857

References

External links Ecology of the European White Elm Photo of type specimen of Ulmus celtidea (Rogov.) Litw. at National Herbarium of Ukraine

Worked examples

Example 1 — a first encounter with Ulmus laevis var. celtidea

Start with the simplest possible case. Write down what Ulmus laevis var. celtidea 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 laevis var. celtidea 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 laevis var. celtidea 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 laevis var. celtidea

In research: Ulmus laevis var. celtidea 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 laevis var. celtidea 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 laevis var. celtidea is common in secondary-school and first-year university syllabi. It links to neighbouring topics Elm species and varieties, Ulmus, so understanding it makes those chapters shorter.
In everyday life: Look for Ulmus laevis var. celtidea 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 laevis var. celtidea in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Ulmus laevis var. celtidea 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.
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Frequently asked questions

What is Ulmus laevis var. celtidea in simple terms?

Why does Ulmus laevis var. celtidea 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 laevis var. celtidea?

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 laevis var. celtidea.