- Phylogenetic tree: A representation of genetic similarity between taxonomic units.
- Tree (plant): A large, perennial, woody plant.
- Tree (data structure): In design of computer software
- Tree of life: Add brief definition or description
Types of trees (plant):
- Acer palmatum: Deciduous tree commonly known as the "Japanese Maple".
- Apple (tree): Pomaceous fruit of an apple tree, species Malus domestica, family Rosaceae.
- Dacrydium_cupressinum: A large evergreen coniferous tree endemic to the forests of New Zealand. (aka Rimu)
- Ginkgo: Dioecious tree, commonly known as the maidenhair tree (Ginkgo biloba), that is native to China and is cultivated as a shade tree, and is regarded as a living fossil.
- Maple: Deciduous tree or shrub of the genus Acer of the North Temperate Zone, having opposite, usually palmate leaves and long-winged fruits borne in pairs.
- Medlar: A fruit tree of minor importance, Mespilus germanica, mostly cultivated as an ornamental tree.
- Peach: The popular fruit produced by the tree Prunus persica.
- Pear: The fruit of various trees in the genus Pyrus, cultivated around the world for food.
- Pine (tree): A conifer belonging to the genus Pinus and the family Pinaceae.
- Sorb: Several Old World trees of the genus Sorbus in the rose family, cultivated for its flowers, and whose berries are edible. (aka mountain ash or service tree)
- Espalier: A tree or shrub whose branches are trained to grow in only two dimensions, usually supported on a lattice or frame (also called an espalier).
- Specimen_tree: Ornamental tree planted as a feature in a house park or garden.
- : The clipping of shrubs or trees into ornamental shapes.
- Tree Shaping: In horticulture, the practice of training a tree or shrub to grow into a specific shape.
- Treehouse: A shelter built in, or supported in part by, a tree or multiple trees.