science

Penstemon angustifolius

Penstemon angustifolius 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 Penstemon angustifolius rather than just read about it. In short: Penstemon angustifolius is a perennial semi-evergreen forb belonging to the plantain family. This species is 1 out of roughly 273 species of Penstemon.

Key takeaways

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

Reference excerpt

Penstemon angustifolius is a perennial semi-evergreen forb belonging to the plantain family. This species is 1 out of roughly 273 species of Penstemon. This species is also known as broadbeard beardtongue. This forb is native to central United States and can be noticed by its brightly and highly variable colored flowers.

Description Penstemon angustifolius is a herbaceous plant that can grow between 6 and 65 centimeters (2 and 26 in), but more often is 15 to 45 cm (6 to 18 in) tall. The stems are thick, waxy, and gray-green with somewhat woody bases. Their basal leaves, those springing directly from the base of the plant, range from 25–90 millimeters in length and 2–18 mm in width, though they are usually longer than 40 mm. They have a leathery feel with a smooth, hairless surface, though occasionally they may be rough in texture. Leaf shapes vary between spatulate, spoon shaped, oblanceolate, like the head of a spear with a tapered base and end, or linear, narrow like a grass blade. The lowest cauline leaves, those attached to the stems, are similar to the basal leaves. The flowers can be a range of colors, from pink and blue to lavender which bloom from April to June.

Distribution and habitat This species is found in the west-central United States extending from Montana and North Dakota to Arizona, New Mexico, and Kansas. They can be found in the Great Plains and the Rocky Mountains. They are drought tolerant and live in sandy soil with good drainage. These plants grow near each other in groups that can be found at elevations of 1200–2200 m.

Taxonomy Penstemon angustifolius was scientifically described and named by Frederick Traugott Pursh, who credited Thomas Nuttall in his publication. It is classified as a Penstemon in the Plantaginaceae family and has five accepted varieties.

Penstemon angustifolius var. angustifolius – From Colorado, Wyoming, Nebraska, North Dakota, South Dakota, and Montana Penstemon angustifolius var. caudatus – Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Wyoming Penstemon angustifolius var. dulcis – Utah Penstemon angustifolius var. venosus – Arizona, Colorado, New Mexico, and Utah Penstemon angustifolius var. vernalensis – Colorado and Utah

Synonyms Penstemon angustifolius has 7 synonyms of the species or three of its varieties.

Ecology

This plant is useful in preventing wind erosion in its native environment. Deer and insects are known to eat parts of the penstemon plant. Native bees especially enjoy this plant and the seeds are used by birds, rodents, ants and bees. Penstemon weevils are an observed herbivore of this plant.

Culture and use Penstemon angustifolius have been cultivated as early as the 1800s. Native Americans have been recorded to use the plant roots medicinally. Additionally the pigment from the petals has been used to paint moccasins by the Lokota. This plant can be used in landscaping and as a garden plant in xeriscaping situations.

Illustrations

Worked examples

Example 1 — a first encounter with Penstemon angustifolius

Start with the simplest possible case. Write down what Penstemon angustifolius 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 Penstemon angustifolius 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 Penstemon angustifolius 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 Penstemon angustifolius

In research: Penstemon angustifolius 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 Penstemon angustifolius 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: Penstemon angustifolius is common in secondary-school and first-year university syllabi. It links to neighbouring topics Flora of Arizona, Flora of Colorado, Flora of Kansas, so understanding it makes those chapters shorter.
In everyday life: Look for Penstemon angustifolius 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 Penstemon angustifolius in 20 minutes

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

Frequently asked questions

What is Penstemon angustifolius in simple terms?

Penstemon angustifolius is a perennial semi-evergreen forb belonging to the plantain family. This species is 1 out of roughly 273 species of Penstemon.

Why does Penstemon angustifolius 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 Penstemon angustifolius?

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 Penstemon angustifolius.