biology

Nephrolepis

Nephrolepis 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 Nephrolepis rather than just read about it. In short: Nephrolepis is a genus of about 30 species of ferns. It is the only genus in the family Nephrolepidaceae, placed in the suborder Aspleniineae (eupolypods I) of the order Polypodiales in the Pteridophyte Phylogeny Group classification of 2016 (PPG I).

Key takeaways

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

Reference excerpt

Nephrolepis is a genus of about 30 species of ferns. It is the only genus in the family Nephrolepidaceae, placed in the suborder Aspleniineae (eupolypods I) of the order Polypodiales in the Pteridophyte Phylogeny Group classification of 2016 (PPG I). (It is placed in the Dryopteridaceae in some other classifications.) Species in this genus include plants commonly referred to as Boston ferns. The fronds are long and narrow, and once-pinnate, in the case of one Bornean species reaching thirty feet (nine meters) in length.

Phylogeny The following cladogram for the suborder Polypodiineae (eupolypods I), based on the consensus cladogram in the Pteridophyte Phylogeny Group classification of 2016 (PPG I), shows a likely phylogenetic relationship between Nephrolepidaceae and the other families of the clade.

Selected species Nephrolepis biserrata (Sw.) Schott. (syn. Aspidium bisseratum Sw., Aspidium acutum Schkuhr, Nephrolepis acuta (Schkuhr) C. Presl, Polypodium puctulatum Poir) Nephrolepis cordifolia (L.) C. Presl (syn. Polypodium cordifolium L., Nephrolepis tuberosa (Bory ex Willd.) C. Presl, Aspidium tuberosum Bory ex Willd.) Nephrolepis exaltata (L.) Schott (syn. Polypodium exaltatum L.) Nephrolepis falcata Nephrolepis multiflora (Roxb.) F.M. Jarret ex C.V. Morton (syn. Davallia multiflora Roxb.) Nephrolepis obliterata Nephrolepis pectinata (Willd.) Schott (syn. Aspidium pectinatum Willd.) Nephrolepis tuberosa Some species of Nephrolepis are grown as ornamental plants. Nephrolepis exaltata and Nephrolepis obliterata are reported to be good plants for cleaning indoor air. Some Nephrolepis species may prove to be a good source of new antimicrobial chemicals.

References

Further reading Hennequin, S., Hovenkamp, P., Christenhusz, M.J.M. & Schneider, H. (2010) Phylogenetics and biogeography of Nephrolepis – a tale of old settlers and young tramps. Bot. J. Linn. Soc. 164(2): 113–127. doi:10.1111/j.1095-8339.2010.01076.x Lorenzi, H. & Souza, M. S. (2001). Plantas Ornamentais no Brasil: arbustivas, herbáceas e trepadeiras. Plantarum ISBN 85-86714-12-7

External links

USDA Plants Profile for Nephrolepis (swordfern) Nephrolepis biserrata At: Nephrolepis At: Biodiversity Database At: Cook Islands Biodiversity Website

Illustrations

Worked examples

Example 1 — a first encounter with Nephrolepis

Start with the simplest possible case. Write down what Nephrolepis 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 Nephrolepis 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 Nephrolepis 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 Nephrolepis

In research: Nephrolepis 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 Nephrolepis 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: Nephrolepis is common in secondary-school and first-year university syllabi. It links to neighbouring topics Fern genera, Nephrolepis, Polypodiales, so understanding it makes those chapters shorter.
In everyday life: Look for Nephrolepis 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 Nephrolepis in 20 minutes

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

Frequently asked questions

What is Nephrolepis in simple terms?

Why does Nephrolepis 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 Nephrolepis?

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 Nephrolepis.