biology

Vicia dennesiana

Vicia dennesiana 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 Vicia dennesiana rather than just read about it. In short: †Vicia dennesiana is a species in the Fabaceae family, named after the solicitor and plant collector George Edgar Dennes. It is protected by the Bern Convention on the Conservation of European Wildlife and Natural Habitats.

Key takeaways

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

Reference excerpt

†Vicia dennesiana is a species in the Fabaceae family, named after the solicitor and plant collector George Edgar Dennes. It is protected by the Bern Convention on the Conservation of European Wildlife and Natural Habitats. This species has not been found in the wild since 1848, and is considered extinct in its natural habitat. It has not been observed in cultivation since 1922. The habitat of the species is poorly known. The available data indicate that the species developed on the sheltered slopes of Serra da Tronqueira, São Miguel Island, Azores, but the population was subsequently destroyed in a landslide. A cultivated population was maintained in the Thames Ditton garden of Hewett Cottrell Watson, the author who described the species. Several seeds were germinated and produced annually flowering and fruiting plants. In the winter, the plants were sheltered in a greenhouse to protect them from frost, and in the summer they were planted in the garden. However, at the end of May 1867, almost all of Watson's plants had died due to a late frost. One of the three surviving plants bloomed again in the summer of the next year, which made it possible to continue to cultivate the species. After Watson's death a specimen was transferred to the Royal Botanical Gardens of Kew. Due to unsuccessful propagation, today only herbarium specimens remain.

Herbarium specimens The Fielding-Druce Herbarium of Oxford University and the Kew Gardens Herbarium include specimens collected on Ilha de São Miguel. Preserved specimens of Vicia dennesiana cultivated by Watson are held by herbaria including the National Herbarium of Victoria Royal Botanic Gardens Victoria, and the Copenhagen University Botanical Museum.

References

Illustrations

Worked examples

Example 1 — a first encounter with Vicia dennesiana

Start with the simplest possible case. Write down what Vicia dennesiana 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 Vicia dennesiana 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 Vicia dennesiana 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 Vicia dennesiana

In research: Vicia dennesiana 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 Vicia dennesiana 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: Vicia dennesiana is common in secondary-school and first-year university syllabi. It links to neighbouring topics Endemic flora of the Azores, Species extinct in the wild, Vicia, so understanding it makes those chapters shorter.
In everyday life: Look for Vicia dennesiana 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 Vicia dennesiana in 20 minutes

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

Frequently asked questions

What is Vicia dennesiana in simple terms?

Why does Vicia dennesiana 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 Vicia dennesiana?

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 Vicia dennesiana.