biology

Physalis mollis

Physalis mollis 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 Physalis mollis rather than just read about it. In short: Physalis mollis, commonly known as field ground-cherry, is a species of flowering plant in the nightshade family, Solanaceae. It is a perennial herb native to the south-central United States and Mexico.

Key takeaways

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

Reference excerpt

Physalis mollis, commonly known as field ground-cherry, is a species of flowering plant in the nightshade family, Solanaceae. It is a perennial herb native to the south-central United States and Mexico. It grows in sandy soils, prairies, roadsides, and disturbed habitats.

Description Physalis mollis is a perennial herb. It flowers from March to October. Like other members of Physalis, it produces flowers followed by berries enclosed within an enlarged, papery calyx. Physalis mollis is distinguished from related stellate-pubescent species by the undersurfaces of the mid-stem and upper leaves being densely white-tomentose, with the pubescence mostly obscuring the blade surface.

Taxonomy Physalis mollis was first described by Thomas Nuttall in 1836 in the Transactions of the American Philosophical Society. The original data cited Texas and northern Mexico. Plants of the World Online accepts the species as Physalis mollis Nutt. Plants of the World Online recognizes two infraspecific taxa: Physalis mollis var. mollis and Physalis mollis var. variovestita. NatureServe follows the broad Flora of North America treatment of P. mollis, including var. variovestita. Other treatments, including Turner and Martínez and Weakley, exclude var. variovestita from P. mollis and treat it as a variety of Physalis cinerascens.

Distribution and habitat Physalis mollis is native from Oklahoma to Alabama and Mexico. Plants of the World Online lists it as native to Alabama, Arkansas, Louisiana, Oklahoma, Texas, and parts of Mexico. NatureServe describes it as occurring in the south-central United States from Arkansas and Oklahoma south to Louisiana and Texas, extending into Mexico. The species grows in sandy soil, prairies, roadsides, and disturbed habitats, at elevations of 0–200 m (0–656 ft).

Infraspecific taxa Plants of the World Online accepts two varieties:

Var. mollis Physalis mollis var. mollis is the typical variety of the species. It is a wide-ranging perennial taxon of sandy soil, prairies, roadsides, and disturbed habitats in the south-central United States and Mexico. It is ranked G5T5 by NatureServe, indicating that the variety is secure.

Var. variovestita Physalis mollis var. variovestita was published by J.R. Sullivan in 1985, based on Physalis variovestita Waterf. NatureServe and Plants of the World Online treat it as a variety of P. mollis, while Turner and Martínez and Weakley place it under Physalis cinerascens as Physalis cinerascens var. variovestita. NatureServe describes it as endemic to eastern Texas, from the extreme southern part of the state north along the coast to Aransas County. It grows in open sands, other dry habitats, and disturbed sandy areas, at elevations of 0–20 m (0–66 ft).

Conservation NatureServe ranks Physalis mollis as , indicating that it is globally secure. The status was last reviewed on 9 October 2025. NatureServe estimates more than 180 occurrences rangewide and notes that, although threats are not well documented, the species may be affected in some places by development, rights-of-way maintenance, agriculture and pasturage, invasive species, and other threats. However, NatureServe considers the overall impact likely negligible because of the species' broad range, large number of occurrences, and tolerance of light disturbance. The species has no status under the United States Endangered Species Act.

Toxicity Unripe fruits and foliage of Physalis species contain solanine and other solanidine alkaloids and are toxic if ingested in large quantities.

References

Illustrations

Worked examples

Example 1 — a first encounter with Physalis mollis

Start with the simplest possible case. Write down what Physalis mollis 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 Physalis mollis 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 Physalis mollis 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 Physalis mollis

In research: Physalis mollis 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 Physalis mollis 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: Physalis mollis is common in secondary-school and first-year university syllabi. It links to neighbouring topics Flora of Mexico, Flora of the United States, NatureServe secure species, so understanding it makes those chapters shorter.
In everyday life: Look for Physalis mollis 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 Physalis mollis in 20 minutes

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

Frequently asked questions

What is Physalis mollis in simple terms?

Why does Physalis mollis 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 Physalis mollis?

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 Physalis mollis.