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Beech

life science Maturity 5-7 Next article →

The beech is a genus of deciduous trees known scientifically as Fagus. These trees belong to the Fagaceae family, which also includes oaks and chestnuts. Beeches are found across Eurasia and North America in various environments. Some live in subtropical regions as part of accessory forest elements. Others serve as the dominant part of temperate mesophytic forests.

Forest in Tanzawa 08
Forest in Tanzawa 08

They are essential to many ecosystems and human industries.

Beech trees follow a specific biological process for reproduction. They are monoecious, meaning a single plant carries both male and female flowers. The male flowers are shaped like catkins and use wind pollination to spread pollen. The female flowers grow in pairs on the plant. Once pollinated, the tree produces a fruit shaped like a three-angled nut. These nuts are held within a spiny, dehiscent cupule, which is a protective husk that opens at maturity.

Fagus engleriana - Morris Arboretum - DSC00475
Fagus engleriana - Morris Arboretum - DSC00475

The leaves are deciduous, so they drop every autumn. Most species feature smooth bark and leaves with parallel side-veins and small teeth on the edges.

Taxonomists divide the 14 accepted species into two distinct subgenera. The first is subgenus Englerianae, which is found only in East Asia. These trees are unique because they have low branches and often possess several major trunks. They also have yellowish bark and a whitish bloom on the underside of their leaves. The second group is subgenus Fagus, which includes the more widely known species. These are typically high-branching trees with tall, stout trunks and silver-grey bark.

Fagus grandifolia JPG1Ms
Fagus grandifolia JPG1Ms

The evolutionary history of the beech is very deep. The lineage is the first to diverge within the Fagaceae family. Scientists have found beech pollen in the fossil record dating back 81 to 82 million years. This specific pollen was found in the Late Cretaceous of Wyoming, United States. Modern genus representatives likely appeared during the Paleocene in Arctic North America. They then spread across high latitudes, reaching a peak of diversity during the Miocene in northeastern Asia.

Different species within these groups have very specific homes. The European beech, Fagus sylvatica, is the most commonly cultivated species. It is a major forest tree in Europe and parts of Western Eurasia. In North America, Fagus grandifolia is a widespread species. Some beeches are very rare or restricted to tiny areas. For example, Fagus multinervis is endemic to the South Korean island of Ulleungdo.

Fagus lucida Buk 2020-07-18 01
Fagus lucida Buk 2020-07-18 01

Other species like Fagus mexicana live only in specific Mexican montane forests.

Humanity uses beech in many surprising ways. The timber is used for furniture, flooring, construction, and plywood. Because it burns well, beechwood is an excellent source of firewood. It even plays a role in food production. In Germany, beech logs are burned to dry malt for smoked beers. Small slats of washed beech wood are placed in fermentation tanks for certain beers.

Fagus crenata in Ogasayama 2010-10-17
Fagus crenata in Ogasayama 2010-10-17

The wood's smoke is also used to flavor Westphalian ham, certain sausages, and cheeses.

Understanding beech also requires looking at its complex genetics. Many species show high levels of heterozygosity and intragenomic variation. This means their genetic makeup is very diverse. The subgenera Englerianae and Fagus diverged from each other during the Early Oligocene, roughly 32.1 to 33.4 million years ago. Even the name "beech" has historical connections. It is related to the word for "book" because old Runic tablets were made from beech wood.

Fagus sylvatica TK 2023-05-06 5
Fagus sylvatica TK 2023-05-06 5
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🖼️ Images & Media (12)
File:Fagus sylvatica pliocenica MHNT.PAL.VEG.2002.31 (cropped).jpg
Fagus sylvatica pliocenica...
File:Fagus crenata in Ogasayama 2010-10-17.jpg
Fagus crenata in Ogasayama 2010-10-17.jpg
File:Fagus engleriana - Morris Arboretum - DSC00475.JPG
Fagus engleriana - Morris Arboretum - DSC00475.JPG
File:Fagus grandifolia JPG1Ms.jpg
Fagus grandifolia JPG1Ms.jpg
File:Fagus hayatae 98412.jpg
Fagus hayatae 98412.jpg
File:Fagus hohenackeriana near Fioletovo village, Armenia S-N 04.jpg
Fagus hohenackeriana near Fioletovo...
File:Forest in Tanzawa 08.jpg
Forest in Tanzawa 08.jpg
File:Fagus lucida Buk 2020-07-18 01.jpg
Fagus lucida Buk 2020-07-18 01.jpg
File:Fagus mexicana, Zacualtipán de Ángeles, Hidalgo, Mexico 5737290.jpg
Fagus mexicana, Zacualtipán de Ángeles,...
File:TR Yedigöller asv2021-10 img13.jpg
TR Yedigöller asv2021-10 img13.jpg
File:Fagus sylvatica TK 2023-05-06 5.jpg
Fagus sylvatica TK 2023-05-06 5.jpg
File:Venus with a Mirror (study) (cropped).jpg
Venus with a Mirror (study) (cropped).jpg
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