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Magnolia

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Magnolia is a large genus of flowering plants within the family Magnoliaceae. These plants include various evergreen or deciduous trees and shrubs. The genus is scientifically significant because it represents an ancient lineage of flowering plants. Depending on the taxonomic view, the genus contains between 210 and 340 species. Some researchers use a broad definition, known as *sensu lato*, to include related genera like *Michelia* and *Talauma*. Others prefer a narrow definition, or *sensu stricto*, which includes about 120 species.

Magnolia flowers (Wiesbaden, Germany)
Magnolia flowers (Wiesbaden, Germany)

The anatomy of a magnolia flower reveals much about its evolutionary history. Unlike many modern flowers, the perianth is undifferentiated. This means the outer parts do not have distinct sepals and petals. Instead, they consist of 9 to 15 tepals arranged in three or more whorls. The flowers are hermaphroditic, meaning they contain both male and female reproductive organs. These parts, including the stamens and carpels, are arranged in a spiral fashion on an elongated receptacle.

Magnolia biondii
Magnolia biondii

The carpels are often damaged by pollinating beetles during the process. In the autumn, the plant produces cone-like fruits. These fruits dehisce, or split open, along the dorsal sutures of the carpels to reveal seeds.

Magnolia Fruit (South America)
Magnolia Fruit (South America)

Magnolias are categorized into different groups based on their characteristics. The genus is often divided into two subgenera: *Magnolia* and *Yulania*. The subgenus *Magnolia* includes American evergreen species like *M. grandiflora*. It also contains the type species, *M. virginiana*. The subgenus *Yulania* contains several deciduous Asiatic species. Examples include *M. denudata* and *M. kobus*. This subgenus also includes the American deciduous *M. acuminata*, also known as the cucumber tree.

Magnolia Tree Kenosha
Magnolia Tree Kenosha

The history of magnolia naming involves several famous botanists. French botanist Charles Plumier first used the name Magnolia in 1703. He named the genus to honor the French botanist Pierre Magnol. Later, Carl Linnaeus adopted the name in 1735. Linnaeus described *Magnolia virginiana* as a monotypic genus. He also identified several varieties that were later raised to species status. Over time, botanists explored Asia and described many new species from China and Japan.

Magnolia x soulangeana
Magnolia x soulangeana

Modern science has changed how we classify these plants. In the past, taxonomists like James E. Dandy used fruit differences for classification. In 1927, Dandy accepted 10 different genera within the Magnoliaceae family. However, the end of the 20th century brought DNA sequencing technology. Molecular phylogenetic studies have revealed complex evolutionary relationships. These studies show that the genus *Michelia* and the subgenus *Yulania* are closely allied. This genetic evidence often contradicts older classifications based only on physical appearance.

Magnolia Tree - panoramio
Magnolia Tree - panoramio

Magnolias are incredibly ancient and have survived many geological events. Fossilized specimens of *M. acuminata* date back 20 million years. Even older fossils of plants belonging to the Magnoliaceae family date to 95 million years ago. Because they existed before the evolution of bees, they likely evolved to be pollinated by beetles. This is considered an ancestral state for flowering plants. The flower bud is also unique because it is enclosed in a bract rather than in sepals.

Bloemknop van een Magnolia, 05-03-2024. (actm.) 01
Bloemknop van een Magnolia, 05-03-2024. (actm.) 01

These plants hold great value for humans in many different fields. They are used in horticulture for their showy, fragrant flowers. In medicine, they are used for bioactive compounds like magnolol and honokiol. Some species are also harvested for timber or used in culinary applications. Culturally, magnolias serve as official symbols for many places. They are the official flowers and trees for Shanghai, Mississippi, Louisiana, North Korea, and Seoul. They are also deeply associated with the Southern United States.

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🖼️ Images & Media (12)
File:Magnolia biondii.jpg
Magnolia biondii.jpg
File:Magnolia Fruit (South America).JPG
Magnolia Fruit (South America).JPG
File:Magnolia x soulangeana.jpg
Magnolia x soulangeana.jpg
File:Magnòlia a Verbania.JPG
Magnòlia a Verbania.JPG
File:Magnolia flowers (Wiesbaden, Germany).JPG
Magnolia flowers (Wiesbaden, Germany).JPG
File:Bloemknop van een Magnolia, 05-03-2024. (actm.) 01.jpg
Bloemknop van een Magnolia, 05-03-2024....
File:Michelia figo Purple Queen1.jpg
Michelia figo Purple Queen1.jpg
File:Star Magnolia from Halifax botanical gardens.jpg
Star Magnolia from Halifax botanical gardens.jpg
File:Magnolia wieseneri.jpg
Magnolia wieseneri.jpg
File:MagnoliaTreeInFullGlory.jpg
MagnoliaTreeInFullGlory.jpg
File:Magnolia Tree Kenosha.jpg
Magnolia Tree Kenosha.jpg
File:Magnolia Tree - panoramio.jpg
Magnolia Tree - panoramio.jpg
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