This section of my articles goes much deeper than most of the rest of the content. It in no way invalidates the Tree Care articles; it is more of an advanced class, using more technical language, and a deeper look into the internal lives of trees.

A good place to begin is with the articles called A Practical Working Model of Your Tree, and a good conclusion is the two articles called Arborist’s Education and How to Have a Successful Tree.

Too deep? Check out my general Tree Care Articles.

Vascular Cambium

Secondary growth, the increase in volume and width of shrub and tree branches and trunks and roots, is accomplished by a lateral meristem called the vascular cambium.

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Leaves

Leaves are tirelessly active as much as 16 hours a day in the height of the growing season.

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Stems

Stems, tree trunks, branches and shoots are above ground organs that perform a number of essential activities helping to reveal the hidden life of trees.

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Roots

Roots are the unsung heroes of the plant world, serving as anchors, absorbing minerals and water, and even producing hormones.

(Photo credit: “Cardamine hirsuta () Photo: F.D.Richards, SE Michigan, 4/2021 - Hairy Bittercress" by F.D. Richards, licensed under CC BY-SA 2.0.)

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Epidermis

The epidermis, like almost all tree tissue, operates at the microscopic level, giving us another window into the hidden life of trees.

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