biology

Larix griffithii

Larix griffithii 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 Larix griffithii rather than just read about it. In short: Larix griffithii, the Sikkim larch, is a species of larch, native to the eastern Himalaya in easternmost Nepal, India (Sikkim, Arunachal Pradesh), western Bhutan, and (in some interpretations) southwestern China (Xizang, Yunnan). It grows at 1,800–4,100 metres (5,900–13,500 ft) in altitude.

Key takeaways

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

Reference excerpt

Larix griffithii, the Sikkim larch, is a species of larch, native to the eastern Himalaya in easternmost Nepal, India (Sikkim, Arunachal Pradesh), western Bhutan, and (in some interpretations) southwestern China (Xizang, Yunnan). It grows at 1,800–4,100 metres (5,900–13,500 ft) in altitude. It is sometimes called the Himalayan larch, not to be confused with Larix potaninii var. himalaica, which is generally known as the 'Langtang larch'.

Description

It is a medium-sized deciduous coniferous tree reaching 20–25 m (66–82 ft) tall, with a trunk up to 0.8 m (2 ft 7 in) in diameter. The crown is slender conic; the main branches are level to upswept, the side branchlets pendulous from them. The shoots are dimorphic, with growth divided into long shoots (typically 10–50 cm (4–20 in) long) and bearing several buds, and short shoots only 1–2 mm (0.039–0.079 in) long with only a single bud. The leaves are needle-like, light glaucous green, 2–4 cm (1–2 in) long; they turn bright yellow to orange before they fall in the autumn, leaving the pale yellow-brown shoots bare until the next spring. The cones are erect, ovoid-conic, 4–7.5 cm (2–3 in) long, with 50-100 seed scales, each seed scale with a long exserted and reflexed basal bract; they are dark purple when immature, turning dark brown and opening to release the seeds when mature, 5–7 months after pollination. The old cones commonly remain on the tree for many years, turning dull grey-black.

Taxonomy Two varieties are accepted by Kew's Plants of the World Online; these are regarded as separate species by many other authors, including the Flora of China:

Larix griffithii var. griffithii. Himalaya in the far east of Nepal, India, and Bhutan. Larix griffithii var. speciosa (W.C.Cheng & Y.W.Law) Farjon. Disjunct, in Yunnan. Treated as Larix speciosa W.C.Cheng & Y.W.Law by the Flora of China. Synonyms of L. griffithii include Abies griffithiana J. D. Hooker ex Lindley & Gordon and Larix griffithiana hort. ex Carrière. Trees to the northeast of the range in eastern Bhutan and Xizang have been separated as Larix kongboensis (Mill 1999); they differ in smaller cones 3–5 cm (1–2 in) long. This species has been accepted by the Flora of China but not by POWO.

References and external links

Illustrations

Worked examples

Example 1 — a first encounter with Larix griffithii

Start with the simplest possible case. Write down what Larix griffithii 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 Larix griffithii 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 Larix griffithii 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 Larix griffithii

In research: Larix griffithii 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 Larix griffithii 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: Larix griffithii is common in secondary-school and first-year university syllabi. It links to neighbouring topics Deciduous conifers, Flora of Tibet, Flora of Yunnan, so understanding it makes those chapters shorter.
In everyday life: Look for Larix griffithii 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 Larix griffithii in 20 minutes

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

Frequently asked questions

What is Larix griffithii in simple terms?

Why does Larix griffithii 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 Larix griffithii?

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 Larix griffithii.