biology

Hippeastrum subg. Tocantinia

Hippeastrum subg. Tocantinia 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 Hippeastrum subg. Tocantinia rather than just read about it. In short: Hippeastrum subg. Tocantinia is a subgenus of the genus Hippeastrum endemic to Brazil.

Key takeaways

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

Reference excerpt

Hippeastrum subg. Tocantinia is a subgenus of the genus Hippeastrum endemic to Brazil.

Description

Vegetative characteristics Hippeastrum subg. Tocantinia are bulbous, 30–70 cm tall perennial herbs with globose bulbs bearing 3–8 annual leaves.

Generative characteristics The single-flowered inflorescence with a hollow or solid, 15–70 cm long, and 2–7 mm wide scape bears a fragrant, zygomorphic flower.

Cytology The chromosome count is 2n = 22.

Taxonomy It was first published as Tocantinia Ravenna by Ravenna in 2000 with Tocantinia mira Ravenna as the type species. It was merged into the genus Hippeastrum Herb. as Hippeastrum subg. Tocantinia (Ravenna) Nic.García by Nicolás García Berguecio in 2019.

Species It has three species:

Hippeastrum dutilhianum (Büneker, R.E.Bastian & C.M.Costa) Christenh. & Byng Hippeastrum mirum (Ravenna) Christenh. & Byng Hippeastrum stigmovittatum (Büneker, R.E.Bastian & C.M.Costa) Christenh. & Byng

Etymology The subgeneric name Tocantinia refers to Tocantins, Brazil.

Distribution and habitat It is endemic to Brazil, where it occurs in the states of Bahia, Minas Gerais, and Tocantins.

References

Illustrations

Worked examples

Example 1 — a first encounter with Hippeastrum subg. Tocantinia

Start with the simplest possible case. Write down what Hippeastrum subg. Tocantinia 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 Hippeastrum subg. Tocantinia 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 Hippeastrum subg. Tocantinia 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 Hippeastrum subg. Tocantinia

In research: Hippeastrum subg. Tocantinia 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 Hippeastrum subg. Tocantinia 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: Hippeastrum subg. Tocantinia is common in secondary-school and first-year university syllabi. It links to neighbouring topics Amaryllidaceae stubs, Endemic flora of Brazil, Flora of Brazil, so understanding it makes those chapters shorter.
In everyday life: Look for Hippeastrum subg. Tocantinia 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 Hippeastrum subg. Tocantinia in 20 minutes

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

Frequently asked questions

What is Hippeastrum subg. Tocantinia in simple terms?

Hippeastrum subg. Tocantinia is a subgenus of the genus Hippeastrum endemic to Brazil.

Why does Hippeastrum subg. Tocantinia 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 Hippeastrum subg. Tocantinia?

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 Hippeastrum subg. Tocantinia.