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Chrysanthemum

life science Maturity 5-7 Next article →

Chrysanthemums are perennial herbaceous flowering plants that bloom during the autumn months.

Chrysanthemum x morifolium Dompierre 3
Chrysanthemum x morifolium Dompierre 3

Members of the Asteraceae family, these plants are often called "mums" or "chrysanths." Most species are native to East Asia and northeastern Europe. China is considered the center of diversity for the genus. Today, the world contains a massive variety of these plants. Estimates from 2014 suggest there are over 20,000 cultivars globally. About 7,000 of these specific varieties are found in China alone.

Chrysanthemum indicum 11012013
Chrysanthemum indicum 11012013

The physical structure of a chrysanthemum is quite complex. The leaves are arranged alternately along the stem. These leaves are often divided into leaflets and may be lobed or serrate, which means they have tooth-like edges. The flower is actually a compound inflorescence. This means it is an array of many small flower heads. Each head has a base protected by layers of phyllaries. Within the head, you will find ray florets, which are the outer petals. These can be white, yellow, or red. The center contains disc florets, which are typically yellow. The fruit produced by the plant is a ribbed achene.

Pollens of Chrysanthemum
Pollens of Chrysanthemum

Even the pollen is specific, measuring approximately 34 microns.

Taxonomy, or the science of naming and classifying life, has seen much change for this genus. The scientist Linnaeus first formally described the genus in 1753. At that time, he identified 14 different species. Over time, the genus was split into several other groups. These included genera such as Argyranthemum, Glebionis, and Leucanthemum. There was much debate regarding these names. However, a ruling by the International Botanical Congress in 1999 changed things. They designated Chrysanthemum indicum as the defining species. This decision restored the economically important florist's chrysanthemums to the genus Chrysanthemum.

The history of chrysanthemum cultivation is very long. In China, they were grown as flowering herbs as far back as the 15th century BCE. By 1630, historians had recorded over 500 different cultivars. In Japan, cultivation began during the Nara and Heian periods. This was between the early 8th and late 12th centuries. During the Edo period, which lasted from the early 17th to late 19th century, chrysanthemum culture flourished. Japanese growers created many new shapes and colors. They even exported these varieties to China at the end of the Edo period.

Flag of the Japanese Emperor
Flag of the Japanese Emperor

These plants hold deep cultural significance in East Asia. In China, the chrysanthemum is one of the "Four Gentlemen" in art. This group also includes the plum blossom, the orchid, and the bamboo. The flower is also a symbol of nobility. In Japan, the chrysanthemum is the imperial crest. The Japanese monarchy is even known as the Chrysanthemum Throne. Japan also hosts many festivals and shows in the autumn. One such event is the Double Ninth Festival. This festival is celebrated on the 9th day of the 9th month. It began in 910 when the imperial court held its first show.

Nagoya Castle Chrysanthemum Competition 2017 11
Nagoya Castle Chrysanthemum Competition 2017 11

Beyond decoration, chrysanthemums have many practical uses. Some species, like Chrysanthemum × morifolium, are used for food and drink. In parts of East Asia, people boil the flowers to make chrysanthemum tea. In Korea, a rice wine called gukhwaju is flavored with these flowers. The leaves can also be used as greens in Chinese cuisine. Some people even use them as a garnish for sashimi in Japan. In the United States, the plant arrived in 1798. A man named Colonel John Stevens imported a variety called "Dark Purple" from England. He intended to grow them in New Jersey.

Red lacquerware dish, Ming Dynasty
Red lacquerware dish, Ming Dynasty

Chrysanthemums also play a role in science and the environment. Certain species, such as Tanacetum cinerariifolium, are a source of pyrethrum. This is a natural insecticide. The active components are called pyrethrins, which are found in the achenes. These chemicals attack the nervous systems of insects. They can even stop female mosquitoes from biting. Pyrethrins are biodegradable and break down easily in light. This makes them different from many synthetic chemicals. Additionally, a NASA study showed that these plants can help reduce indoor air pollution. They are truly versatile plants that connect many different parts of human life.

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🖼️ Images & Media (12)
File:NIEdot318.jpg
NIEdot318.jpg
File:Pollens of Chrysanthemum.jpg
Pollens of Chrysanthemum.jpg
File:Chrysanthemum Market (菊市場) in Japan, Taisho era (1914 by Elstner Hilton).jpg
Chrysanthemum Market (菊市場) in Japan,...
File:Chrysanthemum indicum 11012013.jpg
Chrysanthemum indicum 11012013.jpg
File:Chrysanthemum x morifolium Dompierre 3.jpg
Chrysanthemum x morifolium Dompierre 3.jpg
File:Nagoya Castle Chrysanthemum Competition 2017 11.jpg
Nagoya Castle Chrysanthemum Competition...
File:Coleostephus myconis in Jardin des Plantes.jpg
Coleostephus myconis in Jardin des Plantes.jpg
File:Red lacquerware dish, Ming Dynasty.jpg
Red lacquerware dish, Ming Dynasty.jpg
File:Flag of the Japanese Emperor.svg
Flag of the Japanese Emperor.svg
File:Blade and Mounting for a Short Sword (Wakizashi).jpg
Blade and Mounting for a Short Sword...
File:Khalili Collection Kimono 03.jpg
Khalili Collection Kimono 03.jpg
File:Brooklyn Museum - Chrysanthemums Rock and Bird.jpg
Brooklyn Museum - Chrysanthemums Rock and Bird.jpg
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