science

Salix exigua

Salix exigua is a 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 Salix exigua rather than just read about it. In short: Salix exigua (sandbar willow, narrowleaf willow, or coyote willow; syn. S. argophylla, S. hindsiana, S. interior, S. linearifolia, S. luteosericea, S. malacophylla, S. nevadensis, and S. parishiana) is a species of willow native to most of North America except for the southeast and far north, occurring from Alaska east to New Brunswick, and south to northern Mexico.

Key takeaways

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

Reference excerpt

Salix exigua (sandbar willow, narrowleaf willow, or coyote willow; syn. S. argophylla, S. hindsiana, S. interior, S. linearifolia, S. luteosericea, S. malacophylla, S. nevadensis, and S. parishiana) is a species of willow native to most of North America except for the southeast and far north, occurring from Alaska east to New Brunswick, and south to northern Mexico. It is considered a threatened species in Massachusetts while in Connecticut, Maryland, and New Hampshire it is considered endangered.

Description It is a deciduous shrub reaching 4–7 metres (13–23 ft) in height, exceptionally 7.6 m (25 ft) spreading by basal shoots to form dense clonal colonies. The leaves are narrow lanceolate, 4–12 centimetres (1+1⁄2–4+3⁄4 in) long and 2–10 millimetres (1⁄16–3⁄8 in) broad, green, to grayish with silky white hairs at least when young; the margin is entire or with a few irregular, widely spaced small teeth. The flowers are produced in catkins in late spring, after the leaves appear. It is dioecious, with staminate and pistillate catkins on separate plants, the male catkins up to 10 cm (4 in) long, the female catkins up to 8 cm (3 in) long. The fruit is a cluster of capsules, each containing numerous minute seeds embedded in shiny white silk.

Subspecies and Variants The two subspecies, which meet in the western Great Plains, are:

S. exigua subsp. exigua – western North America, leaves grayish all summer with persistent silky hairs, seed capsules 3–6 millimetres (0.12–0.24 in) long S. exigua subsp. interior (Rowlee) Cronq. (syn. S. interior Rowlee) – eastern and central North America, leaves usually lose hairs and become green by summer, only rarely remaining pubescent, seed capsules 5–8 millimetres (0.20–0.31 in) long In California and Oregon,

S. exigua var. hindsiana – Hinds' willow

Cultivation Salix exigua is cultivated as an ornamental tree. In the UK it has gained the Royal Horticultural Society's Award of Garden Merit.

Uses This willow has many uses for Native Americans; the branches are used as flexible poles and building materials, the smaller twigs are used to make baskets, the bark is made into cord and string, and the bark and leaves have several medicinal uses. The Zuni people take an infusion of the bark for coughs and sore throats. The foliage is browsed by livestock.

Ecology The male flowers provide pollen for bees. It is a larval host to the California hairstreak, Lorquin's admiral, mourning cloak, sylvan hairstreak, tiger swallowtail, and viceroy.

References

External links Media related to Salix exigua at Wikimedia Commons Dominguez M. Collet (2004), Willows of Interior Alaska, US Fish and Wildlife Service Salix exigua in the CalPhotos photo database, University of California, Berkeley "Salix exigua". Calflora. Berkeley, California: The Calflora Database. "Salix exigua". Plants for a Future.

Illustrations

Worked examples

Example 1 — a first encounter with Salix exigua

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

In research: Salix exigua appears in 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 Salix exigua 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 exigua is common in secondary-school and first-year university syllabi. It links to neighbouring topics Endangered flora of the United States, Fiber plants, Flora of Alaska, so understanding it makes those chapters shorter.
In everyday life: Look for Salix exigua 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 exigua in 20 minutes

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

Frequently asked questions

What is Salix exigua in simple terms?

Why does Salix exigua matter?

Because it connects several 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 Salix exigua?

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 exigua.