earth science

Podocarpus nubigenus

Podocarpus nubigenus is a earth science 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 Podocarpus nubigenus rather than just read about it. In short: Podocarpus nubigenus (also known as P. nubigena) is a species of podocarp, endemic to the Valdivian temperate forests of southern Chile and adjacent southwestern Argentina. It is the southernmost podocarp in the world.

Key takeaways

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

Reference excerpt

Podocarpus nubigenus (also known as P. nubigena) is a species of podocarp, endemic to the Valdivian temperate forests of southern Chile and adjacent southwestern Argentina. It is the southernmost podocarp in the world. It grows from 38°S to Ultima Esperanza (53°S), in wet and swampy soils. It can settle clear grounds, with a faster growth than the other Chilean Podocarpaceae. It is a medium to large tree, growing to around 20–25 metres (66–82 feet), exceptionally to 35 m (115 ft). The bark peels off in papery flakes, with a purplish to golden brown hue. The sharp, green, needle-like leaves are stiff and leathery, 2 cm long. The cones are highly modified with two to four fused, fleshy, berry-like, juicy scales, bright red when mature, bearing one (rarely two) rounded seeds at the apex of the scales. In a classic example species-pair of the Antarctic flora, it is very closely related to Podocarpus totara from New Zealand, to the extent that if planted together, they are very difficult to distinguish. The best distinction is the slightly brighter green tone of the leaves, compared to the more greyish-green of P. totara.

Cultivation and uses The wood is hard and straight grained, and very resistant to rot; it is yellow with reddish marks, semiheavy, semihard, and resistant to decay, but due to scarcity, is little used. P. nubigenus is occasionally grown as an ornamental tree in the western British Isles and the Pacific Northwest of North America, where it receives the cool summers and high rainfall it requires for successful growth. This tree is tolerant to about −25 °C (−13 °F). It does not have any common English name; cloud podocarp' (a translation of the scientific name); male maniu (a literal translation from the most common name in Chile), Chilean podocarp, and Chilean totara have been suggested, but are little used. Mapuche Native American and Latin American Spanish names include and mañio macho or mañíu macho and huililahuán (Spanish pronunciation: [wililaˈwan]). In southern Chile, it is also known as mañío de hojas punzantes (which is translated as prickly-leaved maniu).

Etymology Podocarpus is derived from Greek and means 'stalked fruit'. The name is in reference to the distinctive shape of the fruit stalks of some species. The species epithet nubigenus means 'cloud-born' or 'cloud-formed'.

References

Further reading Donoso, C. 2005. Árboles nativos de Chile. Guía de reconocimiento. Edición 4. Marisa Cuneo Ediciones, Valdivia, Chile. 136p. Hechenleitner, P., M. Gardner, P. Thomas, C. Echeverría, B. Escobar, P. Brownless y C. Martínez. 2005. Plantas Amenazadas del Centro-Sur de Chile. Distribución, Conservación y Propagación. Universidad Austral de Chile y Real Jardín Botánico de Edimburgo, Valdivia. 188p. Hoffmann, Adriana 1982. Flora silvestre de Chile, Zona Araucana. Edición 4. Fundación Claudio Gay, Santiago. 258p. Bean. W. Trees and Shrubs Hardy in Great Britain. Vol 1 – 4 and Supplement. Murray 1981 Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press 1992 ISBN 0-333-47494-5 Gardner, M. (2013). "Podocarpus nubigenus". IUCN Red List of Threatened Species. 2013 e.T32029A2808526. doi:10.2305/IUCN.UK.2013-1.RLTS.T32029A2808526.en. Retrieved 11 November 2021.

External links "Podocarpus nubigenus". Encyclopedia of Chilean Flora. Retrieved 2009-06-27. "Podocarpus nubigenus". Chilebosque. Retrieved 2009-06-27. "Growing Podocarpus nubigenus in the British Isles". Plants for a Future. Retrieved 2009-06-27.

Illustrations

Worked examples

Example 1 — a first encounter with Podocarpus nubigenus

Start with the simplest possible case. Write down what Podocarpus nubigenus claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In earth science, 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 Podocarpus nubigenus 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 Podocarpus nubigenus 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 Podocarpus nubigenus

In research: Podocarpus nubigenus appears in earth science 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 Podocarpus nubigenus 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: Podocarpus nubigenus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Flora of the Valdivian temperate forests, IUCN Red List near threatened species, Near threatened flora of South America, so understanding it makes those chapters shorter.
In everyday life: Look for Podocarpus nubigenus 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 Podocarpus nubigenus in 20 minutes

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

Frequently asked questions

What is Podocarpus nubigenus in simple terms?

Why does Podocarpus nubigenus matter?

Because it connects several earth science 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 Podocarpus nubigenus?

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 Podocarpus nubigenus.