When you come across the word tree, a certain image of a plant likely comes to mind. But how is it different from a bush, and what is a shrub?
Botanically, a tree is a perennial woody plant that typically has one main trunk supporting branches and leaves above the ground. Perennials are the plants that lives for more than two years, returning to grow and bloom over multiple seasons.
However, there is an interesting scientific distinction: A tree is a actually a growth form, not a single botanical classification. Trees occur in many unrelated plant families.
Botanical characteristics of a tree
Perennial: Lives for more than two years, often for decades or centuries.
Woody structure: Usually produces lignified tissues that provide strength and support.
Trunk: Typically has one main upright stem, although some trees have multiple trunks.
Height: Generally grows taller than shrubs, although there is no universally accepted minimum height.
Branches and crown: Usually develops an elevated crown of branches and leaves.
Vascular system: Contains xylem and phloem to transport water, minerals, and sugars.
