biology

Juniperus recurva

Juniperus recurva 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 Juniperus recurva rather than just read about it. In short: Juniperus recurva, commonly named the Himalayan juniper or drooping juniper, is a juniper native to the Himalaya, from northern Pakistan, through India, Nepal and Bhutan, to western Yunnan in southwestern China. It grows at altitudes of 3,000–4,000 metres (9,800–13,100 feet).

Key takeaways

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

Reference excerpt

Juniperus recurva, commonly named the Himalayan juniper or drooping juniper, is a juniper native to the Himalaya, from northern Pakistan, through India, Nepal and Bhutan, to western Yunnan in southwestern China. It grows at altitudes of 3,000–4,000 metres (9,800–13,100 feet).

Description Juniperus recurva is a large shrub or tree reaching 6–20 metres (20–66 feet) tall (rarely 25 m), with a trunk up to 2 m (6+1⁄2 ft) in diameter and a broadly conical to rounded or irregular crown. The leaves are needle-like, 5–10 millimetres (3⁄16–3⁄8 inch) long, arranged in six ranks in alternating whorls of three. The cones are berry-like, globose to ovoid, 5–10 mm long and 4–7 mm diameter, glossy blue-black, and contain one seed; they are mature in about 18 months. The male cones are 3–4 mm long, and shed their pollen in early spring. It is largely monoecious with pollen and seed cones produced on the same plants.

Varieties There are two varieties, treated as distinct species by some botanists:

Juniperus recurva var. recurva - leaves mostly 5–8 mm. Throughout the range. Juniperus recurva var. coxii - leaves mostly 7–10 mm. Confined to the eastern Himalaya on high rainfall sites.

Cultivation Juniperus recurva is planted as an ornamental tree in western Europe, valued for its drooping foliage, particularly pendulous in the cultivar 'Castlewellan'.

References

Li, N.; Farjon, A.; Christian, T.; Rushforth, K. (2013). "Juniperus recurva". IUCN Red List of Threatened Species. 2013 e.T42247A2966352. doi:10.2305/IUCN.UK.2013-1.RLTS.T42247A2966352.en. Retrieved 12 November 2021. Adams, R. P. Junipers of the World: The genus Juniperus. Victoria: Trafford, 2004. ISBN 1-4120-4250-X

External links Gymnosperm Database — Juniperus recurva

Illustrations

Worked examples

Example 1 — a first encounter with Juniperus recurva

Start with the simplest possible case. Write down what Juniperus recurva 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 Juniperus recurva 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 Juniperus recurva 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 Juniperus recurva

In research: Juniperus recurva 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 Juniperus recurva 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: Juniperus recurva is common in secondary-school and first-year university syllabi. It links to neighbouring topics Flora of Assam (region), Flora of China, Flora of East Himalaya, so understanding it makes those chapters shorter.
In everyday life: Look for Juniperus recurva 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 Juniperus recurva in 20 minutes

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

Frequently asked questions

What is Juniperus recurva in simple terms?

Why does Juniperus recurva 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 Juniperus recurva?

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 Juniperus recurva.