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Tagetes erecta

Tagetes erecta 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 Tagetes erecta rather than just read about it. In short: Tagetes erecta, the Aztec marigold, Mexican marigold, big marigold, cempaxochitl or cempasúchil, is a species of flowering plant in the genus Tagetes native to Mexico and Central America. Despite being native to the Americas, it is often called the African marigold.

Tagetes erecta — main illustration
Tagetes erecta — illustration

Key takeaways

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

Reference excerpt

Tagetes erecta, the Aztec marigold, Mexican marigold, big marigold, cempaxochitl or cempasúchil, is a species of flowering plant in the genus Tagetes native to Mexico and Central America. Despite being native to the Americas, it is often called the African marigold. In Mexico, this plant is found in the wild in the states of México, Michoacán, Puebla, Veracruz and Guerrero. This plant reaches heights of between 20 and 90 cm (7.9 and 35.4 in). The Aztecs gathered the wild plant as well as cultivating it for medicinal, ceremonial and decorative purposes; it was introduced to Europe after the Spanish conquest of the Aztec Empire and colonization and became widely cultivated commercially with many cultivars in use as ornamental plants, and for the cut-flower trade. Some authorities regard Tagetes patula (the French marigold) as a synonym of Tagetes erecta.

Names The Spanish name cempazúchitl (or cempasúchil) comes from the Nahuatl cempohualxochitl ("twenty flower") – 20 (cempohualli) is the base of the Aztec vigesimal counting system, consequently a symbol of completion including in life reflected in measurements like their calendrical daycount. The English name marigold comes from their petals' arrangement resembling Calendula officinalis, also called "Mary's gold" or "marigold". In Thai, it is called ดาวเรือง daao reuaang meaning "glittering star".

Description It is a herbaceous annual or perennial plant whose height ranges from 30 to 110 cm. The root is cylindrical, pivoting, with a fibrous and shallow branching system. The stem is striated, sometimes ridged, smooth or slightly with villi, cylindrical, oval and herbaceous to slightly woody, with resin channels in the bark, which are aromatic when squeezed. Opposite leaves at the bottom alternate at the top, up to 20 cm long, pinnate, composed of 11 to 17 leaflets, lanceolate to linear-lanceolate, up to 5 cm long and 1.5 cm wide, acute to acuminate, serrated to sub-holders, the lower ones of each leaf frequently setiform (in the form of threads), the superiors are sometimes completely setiform; with abundant round glands. The main characteristic of the flowers is that they are grouped in small heads or in solitary inflorescences, on peduncles up to 15 cm long, they are liguladas of yellow colors to red. In the flowers of the disc: 150 to 250 in the simple heads, in the doubles it shows different degrees of transformation in ligules, yellow to orange corollas, of 8 to 10 mm in length. The fruits and seeds are: linear achenes 7 to 10 mm long, smooth or slightly covered with stiff hairs at the corners. It has a long flowering period extending throughout the summer and fall. It reproduces easily by seeds.

Distribution and habitat Although native to Mexico, they are also found in the countries of Central America and the Caribbean: Belize, Bolivia, Colombia, Costa Rica, Cuba, Ecuador, El Salvador, Guatemala, Guyana, Honduras, Jamaica, Nicaragua, Panama, Puerto Rico, the Dominican Republic and Venezuela. In their wild form they are found in the Balsas basin and western Mexico and live in diverse types of ecosystems, such as tropical deciduous forests, thorny forests, cloud forests and pine-oak forests. In the wild, it is found as a getaway in heavily disturbed places at altitudes of 800–2300 m. As an introduced species (cultivated) it can be found in China, India, Zambia, Zimbabwe, South Africa and Australia.

History

The archaeological record of the use of Tagetes erecta among pre-Hispanic civilizations is not as abundant as in the case of other species of the same family. For example, it has been possible to establish the ceremonial use among the Mexica of T. lucida as an aromatic plant, which they called yauhtli, through the chemical analysis of the incense burners found in the remains of the Templo Mayor in Mexico City. The Nahuatl term cempoalxóchitl, was used to refer to several species of flowers, which includes T. erecta, T. lucida, T. patula, T. lunulata, T. tenuifolia, T. peduncularis and T. elongata. This complicates the differentiation of one species and another when such a term is used, however, it appears that T. erecta was primarily named by this term. The identification of T. erecta as some flowers represented in Aztec art, such as those seen in the Coyolxauhqui monolith, as part of the goddess's headdress, has been proposed as a symbol of her sovereignty or her death. They are part of the necklace that a plant deity wears in a vase found in the Templo Mayor, although it could also be T. patula. With the arrival of the Spaniards in Mexico, the documentary record of the ceremonial and medicinal use of T. erecta increased in which the flower is described by Bernardino de Sahagún as:

These flowers are called Cempoalxóchitl; they are yellow and of good smell, and wide and beautiful, that they are born, and others that sow them in the orchards; They are in two ways, some they call females Cempoalxóchitl and they are big and beautiful, and others that are called Cempoalxóchitl males are not so beautiful or so big. Sahagún also describes, in the same work, that the plant had a role in the rituals of the religious Mexica festival in the month of Teculhuitontli, where the goddess of salt Huixtocíhuatl, whose color was yellow, was celebrated and who offered herself as sacrifice a woman. In the work of the physician Francisco Hernández, it is described that the name cempoalxóchitl received at least seven types of flowers, noting that the term properly described the largest of them and that the Spaniards called it carnation of Indian, also lists its medical properties.

Cultivation It is widely cultivated and there are many cultivars used in gardening as an ornamental plant. The cultivar 'Inca Orange' has gained the Royal Horticultural Society's Award of Garden Merit. In Mexico, it is used in the festivities of the Day of the Dead, to decorate altars and tombs; hence the name "flower of the dead". However, since antiquity it is also used for food and medicinal purposes.

Uses

Rituals The meaning of the flower's name to the Aztecs makes the cempasúchil symbolic and used in the Día de Muertos celebration every 2 November in Mexico, it is also called the flor de muertos ("flower of the dead"). Water infused with its fragrant essential oil is used to wash corpses in Honduras, and the flower is still commonly planted in cemeteries.

… excerpt ends here. Continue reading the full article.

Illustrations

Tagetes erecta illustration
Tagetes erecta: Botanical illustration.
Botanical illustration.
Tagetes erecta illustration
Tagetes erecta illustration
Tagetes erecta illustration

Worked examples

Example 1 — a first encounter with Tagetes erecta

Start with the simplest possible case. Write down what Tagetes erecta 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 Tagetes erecta 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 Tagetes erecta 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 Tagetes erecta

In research
Tagetes erecta 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 Tagetes erecta 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
Tagetes erecta is common in secondary-school and first-year university syllabi. It links to neighbouring topics Botanical taxa named by Carl Linnaeus, Crops originating from Mexico, Day of the Dead, so understanding it makes those chapters shorter.
In everyday life
Look for Tagetes erecta 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 Tagetes erecta in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Tagetes erecta means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Tagetes erecta out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Tagetes erecta in simple terms?

Tagetes erecta, the Aztec marigold, Mexican marigold, big marigold, cempaxochitl or cempasúchil, is a species of flowering plant in the genus Tagetes native to Mexico and Central America. Despite being native to the Americas, it is often called the African marigold.

Why does Tagetes erecta 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 Tagetes erecta?

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 Tagetes erecta.

Tags

  • Botanical taxa named by Carl Linnaeus
  • Crops originating from Mexico
  • Day of the Dead
  • Edible plants
  • Flora of Mexico
  • Garden plants
  • Medicinal plants
  • Plant dyes
  • Plants described in 1753
  • Tagetes

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