biology

Penstemon fendleri

Penstemon fendleri 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 Penstemon fendleri rather than just read about it. In short: Penstemon fendleri, also known as plains penstemon or Fendler's penstemon, is a moderate sized flowering plant from the southwestern US and small part of northern Mexico. Description Plains penstemon grows one or more flowering stems, which can grow 15 to 60 centimeters (6–24 in) tall, but are most often 20 to 55 cm (8–22 in).

Key takeaways

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

Reference excerpt

Penstemon fendleri, also known as plains penstemon or Fendler's penstemon, is a moderate sized flowering plant from the southwestern US and small part of northern Mexico.

Description Plains penstemon grows one or more flowering stems, which can grow 15 to 60 centimeters (6–24 in) tall, but are most often 20 to 55 cm (8–22 in). The stems are thick and hairless. The species has both basal leaves and cauline, those attached to the stems, all of them hairless. The lower leaves on the stems and the basal ones measure 2–10 cm (1–4 in) long and 0.4–2.4 cm wide. They are spatulate to oblanceolate, shaped like a spoon or a reversed spear head, with tapered bases. Plains penstemon has narrow, tubular flowers that are blue-violet and curve slightly. The flowers are hairless on the outside and violet to reddish-purple floral guides pointing into the flower and sometimes have sparse white hairs on the lower surface. The lower three lobes spread quite widely. The flowers are in three to twelve groups, each quite distinctly separated. Each group has two branching points of attachment, usually with two or three flowers, but occasionally as many as five. Flowering is usually in March or June, but occasionally as late as July.

Taxonomy Penstemon fendleri was scientifically described and named in 1857 by John Torrey and Asa Gray. It is classified in the genus Penstemon within the Plantaginaceae family. It has no subspecies or botanical synonyms.

Names The species name, fendleri, references the German botanist Augustus Fendler as does the common name Fendler's penstemon. The species is also called Fendler's beardtongue and plains penstemon.

Range and habitat Plains penstemon is native to the southernmost Great Plains, parts of the southern Southwestern United States and northern Mexico. According to the Natural Resources Conservation Service it has been found in Archuleta County, Colorado, but neither the Flora of North America nor Plants of the World Online list it as part of the flora of Colorado. It has also been collected in Kearny and Seward counties in Kansas, but has possibly become locally extinct. It has been found in western Oklahoma and Texas, but in most parts of New Mexico. It is only grows in the southwest of Arizona in Greenlee and Cochise counties. In Mexico is grows in just northern Chihuahua and in Coahuila.

Illustrations

Worked examples

Example 1 — a first encounter with Penstemon fendleri

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

In research: Penstemon fendleri 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 Penstemon fendleri 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 fendleri is common in secondary-school and first-year university syllabi. It links to neighbouring topics Flora of Arizona, Flora of Chihuahua (state), Flora of Coahuila, so understanding it makes those chapters shorter.
In everyday life: Look for Penstemon fendleri 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Penstemon fendleri” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Penstemon fendleri in 20 minutes

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

Frequently asked questions

What is Penstemon fendleri in simple terms?

Penstemon fendleri, also known as plains penstemon or Fendler's penstemon, is a moderate sized flowering plant from the southwestern US and small part of northern Mexico. Description Plains penstemon grows one or more flowering stems, which can grow 15 to 60 centimeters (6–24 in) tall, but are most…

Why does Penstemon fendleri 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 Penstemon fendleri?

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 fendleri.