science

Thorne system

Thorne system 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 Thorne system rather than just read about it. In short: A system of plant taxonomy, the Thorne system of plant classification was devised by the American botanist Robert F. Thorne (1920–2015) in 1968, and he continued to issue revisions over many years (1968–2007).

Key takeaways

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

Reference excerpt

A system of plant taxonomy, the Thorne system of plant classification was devised by the American botanist Robert F. Thorne (1920–2015) in 1968, and he continued to issue revisions over many years (1968–2007). Some versions of the system are available online. The Bioinformatics Working Group Center for the Study of Digital Libraries at Texas A&M University lists the March 1999 version (and other classification systems). James Reveal's course lecture notes (1999) also gives an account of the Thorne system at that time, with an extensive listing of synonyms, both nomenclatural and taxonomic, for each name in the system together with several other classification systems. For a discussion of the various suffixes used for superorders (-florae vs. -anae), see Brummitt 1992, and Thorne 1992. In this latter paper, Thorne sets out his reasons for abandoning -florae for -anae, following contemporary practice.

1968 System

Monocotyledons Superorders

Superorder Alimatiflorae Superorder Triuridiflorae Superorder Liliiflorae Order Liliales Superorder Ariflorae Superorder Commeliniflorae

1992 System The 1992 system lists 69 orders and 440 families

Summary Class Magnoliopsida [= angiosperms ] Subclass Magnoliidae [= dicotyledons ] Superorder Magnolianae Superorder Nymphaeanae Superorder Rafflesianae Superorder Caryophyllanae Superorder Theanae Superorder Celastranae Superorder Malvanae Superorder Violanae Superorder Santalanae Superorder Geranianae Superorder Rutanae Superorder Proteanae Superorder Rosanae Superorder Cornanae Superorder Asteranae Superorder Solananae Superorder Loasanae Superorder Myrtanae Superorder Gentiananae Subclass Liliidae [= monocotyledons ] Superorder Lilianae Superorder Hydatellanae Superorder Triuridanae Superorder Alismatanae Superorder Aranae Superorder Cyclanthanae Superorder Pandananae Superorder Arecanae Superorder Commelinanae

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Thorne system

Start with the simplest possible case. Write down what Thorne system 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 Thorne system 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 Thorne system 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 Thorne system

In research: Thorne system 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 Thorne system 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: Thorne system is common in secondary-school and first-year university syllabi. It links to neighbouring topics Systems of plant taxonomy, so understanding it makes those chapters shorter.
In everyday life: Look for Thorne system 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 Thorne system in 20 minutes

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

Frequently asked questions

What is Thorne system in simple terms?

Why does Thorne system 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 Thorne system?

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 Thorne system.