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Poinsettia

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The poinsettia, scientifically known as Euphorbia pulcherrima, is a commercially vital flowering plant species. It belongs to the Euphorbiaceae family, which is commonly called the spurge family.

Euphorbia pulcherrima (Barlovento) 04
Euphorbia pulcherrima (Barlovento) 04

While many people recognize it for its striking red and green colors, it is actually a shrub or small tree. In the United States, the plant is a massive economic force. Approximately 70 million poinsettias are sold every year during a short six-week period. This seasonal industry is valued at roughly US$250 million. The plant is most famous for its role in Christmas floral displays.

To understand the poinsettia, one must look closely at its structure. Most people mistake the large, colorful parts for flower petals. These are actually modified leaves called bracts. These bracts can appear in many colors, including orange, pink, white, or cream. The true flowers are much smaller and more unassuming. They are grouped into tiny yellow structures called cyathia, which sit in the center of the leaf clusters. All flowers in the Euphorbiaceae family are unisexual, meaning they are either male or female only. In the genus Euphorbia, these flowers are often reduced in size and gathered into an inflorescence, or a cluster of flowers.

The brilliant color of the bracts is caused by a process called photoperiodism. This is a biological response to the length of day and night. For the bracts to change color, the plant requires a specific amount of darkness. It needs at least fourteen hours of darkness at a time for six to eight weeks in a row. During the daylight hours, the plant also requires abundant light to achieve the brightest colors. Because they are semi-evergreen, poinsettias generally lose most of their leaves during the winter months.

The history of the poinsettia involves many different cultures and people. The Aztecs were among the first to cultivate the plant, using it for red dye and as an antipyretic medication. They called the plant cuetlaxōchitl in their Nahuatl language.

Euphorbia pulcherrima Blanco1.167-cropped
Euphorbia pulcherrima Blanco1.167-cropped

European scientists first described the species in 1834. The German scientist Johann Friedrich Klotzsch identified it as a new species. He used the name pulcherrima, a name credited to Carl Ludwig Willdenow. The plant's English name comes from Joel Roberts Poinsett, the first United States minister to Mexico. Poinsett began sending plants from Mexico to his South Carolina greenhouses around 1826.

There is a long-standing misconception regarding the toxicity of the poinsettia.

Poinsettia deadly newspaper
Poinsettia deadly newspaper

For many years, urban legends and incorrect reports suggested the plant was deadly to children and pets. In 1970, a US Food and Drug Administration newsletter erroneously claimed a single leaf could kill a child. However, scientific evidence does not support these claims. While contact with the plant's sap might cause a skin rash, or ingestion might cause nausea, vomiting, or diarrhea, it is not highly toxic. A survey of over 20,000 calls to poison control centers showed no fatalities from poinsettia exposure. In over 92% of those cases, there was no effect at all.

Wild poinsettias have a specific habitat in North and Central America. They grow from Mexico to southern Guatemala, typically in mid-elevation tropical dry forests. Many wild populations live on steep, Pacific-facing slopes in canyons. One unique population exists in the Mexican states of Guerrero and Oaxaca. Genetic analysis suggests these inland plants are the ancestors of most cultivated varieties. Today, these wild populations face risks from unregulated deforestation. This causes habitat loss and leaves the remaining populations highly fragmented. Some small groups may consist of as few as a dozen individuals.

In the modern era, the poinsettia has become a global commercial success. This is due in large part to the Ecke family in the United States. Paul Ecke Jr. helped create the strong association between the plant and the Christmas holiday. The family even used marketing campaigns, such as sending free plants to television stations. Today, the Paul Ecke Ranch serves half of the worldwide market and 70 percent of the US market.

Euphorbia pulcherrima in Viherlandia
Euphorbia pulcherrima in Viherlandia

This massive industry relies on advanced cultivation, including the use of phytoplasma infections to encourage the growth of extra buds. This ensures the plants have the multiple flowers that consumers expect.

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File:Euphorbia_pulcherrima_(Barlovento)_04.jpg
Euphorbia_pulcherrima_(Barlovento)_04.jpg
File:Euphorbia pulcherrima Blanco1.167-cropped.jpg
Euphorbia pulcherrima Blanco1.167-cropped.jpg
File:Poinsettia deadly newspaper.png
Poinsettia deadly newspaper.png
File:Euphorbia_pulcherrima_in_Viherlandia.jpg
Euphorbia_pulcherrima_in_Viherlandia.jpg
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