biology

Salix barrattiana

Salix barrattiana 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 Salix barrattiana rather than just read about it. In short: Salix barrattiana is a species of flowering plant in the willow family known by the common name Barratt's willow. It is native to North America, where it is distributed across Alaska and western Canada, with also a few populations in Montana and Wyoming.

Key takeaways

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

Reference excerpt

Salix barrattiana is a species of flowering plant in the willow family known by the common name Barratt's willow. It is native to North America, where it is distributed across Alaska and western Canada, with also a few populations in Montana and Wyoming. These disjunct populations are probably relics from a time when the climate was colder. The southernmost population is technically in Wyoming, but it is located at the Montana state line and it is limited to one clone of all-staminate plants within an area of 100 square meters (1,100 sq ft) in a high-elevation habitat. This willow is a shrub reaching a maximum height near 1.5 meters (4 ft 11 in). It may form dense thickets. The stems are reddish-brown in color and the smaller branches may be purplish. The twigs are sticky with resin and have a coating of hairs. The leaves are up to 9.5 centimeters (3.7 in) long and have hairy to woolly undersides. The leaves have a strong "balsamic" scent. The stipules and buds are very oily and will stain a pressing sheet yellow. The species is dioecious, with male and female reproductive parts on separate individuals. The inflorescence is a catkin, the male kind up to 5 cm (2.0 in) long and the female up to 9 cm (3.5 in). The catkins are "fuzzy". This plant grows in fir and spruce forests and along rivers and streams. It can be found in boggy habitats and recent alluvial deposits. It is a tundra species. In the southern part of its range, it occurs at elevations up to 3,200 m (10,500 ft) above sea level. This willow may hybridize with S. barclayi, S. commutata, and S. pseudomyrsinites. This species is threatened by global climate change.

References

External links The Nature Conservancy

Illustrations

Worked examples

Example 1 — a first encounter with Salix barrattiana

Start with the simplest possible case. Write down what Salix barrattiana 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 Salix barrattiana 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 Salix barrattiana 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 Salix barrattiana

In research: Salix barrattiana 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 Salix barrattiana 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: Salix barrattiana is common in secondary-school and first-year university syllabi. It links to neighbouring topics NatureServe secure species, Salix, so understanding it makes those chapters shorter.
In everyday life: Look for Salix barrattiana 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 Salix barrattiana in 20 minutes

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

Frequently asked questions

What is Salix barrattiana in simple terms?

Why does Salix barrattiana 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 Salix barrattiana?

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 Salix barrattiana.