biology

Tacca

Tacca 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 Tacca rather than just read about it. In short: The genus Tacca, which includes the batflowers and arrowroot, consists of flowering plants in the order Dioscoreales, native to tropical regions of South America, Africa, Australia, Southeast Asia, and various Oceanic islands. In older texts, the genus was treated in its own family Taccaceae, but the 2003 APG II system incorporates it into the family Dioscoreaceae.

Key takeaways

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

Reference excerpt

The genus Tacca, which includes the batflowers and arrowroot, consists of flowering plants in the order Dioscoreales, native to tropical regions of South America, Africa, Australia, Southeast Asia, and various Oceanic islands. In older texts, the genus was treated in its own family Taccaceae, but the 2003 APG II system incorporates it into the family Dioscoreaceae. The APG III and APG IV systems continue to include Tacca in Dioscoreaceae.

Description Many Tacca species have nearly black flowers, with conspicuous involucral bracts and bracteoles like whiskers. Engbert Drenth hypothesized that species of this genus attracted "carrion and dung flies" for pollination and that the fleshy seam of the seed might be attractive to ants and hence that ants might aid in seed dispersal.

Taxonomy Earlier classifications placed the genus within the monogeneric family Taccaceae, which in turn was the sole family in the order Taccales. Dahlgren recognised the similarities to the genera within the Dioscoreales, and incorporated the family into that order.

Subdivision There are at least 16 species,

Tacca ampliplacenta L.Zhang & Q.J.Li - Yunnan Tacca ankaranensis Bard.-Vauc., 1997 - Madagascar Tacca bibracteata Drenth - Sarawak Tacca borneensis Ridl. - Borneo Tacca celebica Koord. - Sulawesi Tacca chantrieri André, 1901 - Indochina, Assam, Bangladesh, Tibet, Guangdong, Guangxi, Guizhou, Hainan, Hunan, Yunnan Tacca ebeltajae Drenth - Papua New Guinea, Solomon Islands Tacca integrifolia Ker Gawl., 1812 - Tibet, Bhutan, Assam, Bangladesh, Indochina, India, Pakistan, Java, Malaysia, Sumatra, Borneo Tacca leontopetaloides (L.) Kuntze, 1891 - widespread across tropical Africa, Madagascar, Indian Subcontinent, Southeast Asia, New Guinea, Australia, and various islands of the Indian and Pacific Oceans Tacca maculata Seem., 1866 - Western Australia, Northern Territory, Fiji, Samoa Tacca palmata Blume - Indonesia, Indochina, Malaysia, Philippines, New Guinea Tacca palmatifida Baker - Sulawesi Tacca parkeri Seem. - South America Tacca plantaginea (Hance) Drenth, 1972 - Indochina, southern China Tacca reducta P.C.Boyce & S.Julia - Sarawak, Borneo, Malesia Tacca subflabellata P.P. Ling & C.T. Ting, 1982 - Yunnan Synonyms: Tacca lanceolata Spruce - Brazil, Venezuela = Tacca parkeri Seem.

Cultivation Several species are cultivated as ornamental plants for their bold foliage and large flowers. The well-known T. chantrieri goes by the names of black batflower, bat-head lily, devil flower or cat's whiskers. Tacca integrifolia is known as the purple or white batflower. Other cultivated varieties include the arrowroot, T. leontopetaloides, and T. cristata aspera.

Gallery

References

Bibliography

Illustrations

Worked examples

Example 1 — a first encounter with Tacca

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

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

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

Frequently asked questions

What is Tacca in simple terms?

Why does Tacca 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 Tacca?

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 Tacca.