For classification of flowering plants, see APG II system.
About 210 eudicot families include trees.
Adoxaceae (Moschatel family)
Sambucus, Elderberry
Viburnum, Viburnum
Altingiaceae (Sweetgum family)
Liquidambar, Sweetgum
Anacardiaceae (Cashew family)
Anacardium, Cashew etc.
Mangifera, Mango
Pistacia, Pistachio etc.
Rhus, Sumac
Toxicodendron, Lacquer tree etc.
Apocynaceae (Dogbane family)
Pachypodium
Aquifoliaceae (Holly family)
Ilex, Holly
Araliaceae (Ivy family)
Kalopanax septemlobus, Kalopanax
Betulaceae (Birch family)
Alnus, Alder
Betula, Birch
Carpinus, Hornbeam
Corylus, Hazel
Bignoniaceae (Trumpet Creeper family)
Catalpa, Catalpa
Cactaceae (Cactus family)
Carnegiea gigantea, Saguaro
Cannabaceae (Cannabis family)
Celtis, Hackberry
Cornaceae (Dogwood family)
Cornus, Dogwood
Dipterocarpaceae family
Dipterocarpus, Garjan
Shorea, Sal etc.
Ebenaceae (Persimmon family)
Diospyros, Persimmon
Ericaceae (Heath family)
Arbutus, Arbutus
Eucommiaceae (Eucommia family)
Eucommia ulmoides, Eucommia
Fabaceae (Pea family)
Acacia, Acacia
Caesalpinia, Brazilwood etc.
Gleditsia, Honey locust etc.
Laburnum, Laburnum
Robinia, Black locust etc.
Fagaceae (Beech family )
Castanea, Chestnut
Fagus, Beech
Lithocarpus, Tanoak etc.
Quercus, Oak
Fouquieriaceae (Boojum family)
Fouquieria, Boojum etc.
Hamamelidaceae (Witch-hazel family)
Parrotia persica, Persian Ironwood
Juglandaceae (Walnut family)
Carya, Hickory
Juglans, Walnut
Pterocarya, Wingnut
Lauraceae (Laurel family)
Laurus nobilis, Bay Laurel
Cinnamomum verum, C. aromaticum, and Cinnamomum camphora, Cinnamon, Cassia and Camphor Laurel
Persea americana, Avocado
Sassafras albidum, Sassafras
Lecythidaceae (Paradise nut family)
Bertholletia excelsa, Brazil Nut
Lythraceae (Loosestrife family)
Lagerstroemia, Crape-myrtle
Malvaceae (Mallow family; including Tiliaceae, Sterculiaceae and Bombacaceae)
Adansonia, Baobab
Bombax, Silk-cotton tree
Brachychiton, Bottletrees
Ceiba, Kapok etc.
Durio, Durian
Ochroma pyramidale, Balsa
Theobroma, Cacao etc.
Tilia, Linden (Basswood, Lime)
Meliaceae (Mahogany family)
Azadirachta, Neem etc.
Melia, Bead tree etc.
Swietenia, Mahogany
Moraceae (Mulberry family)
Ficus, Fig
Morus, Mulberry
Myrtaceae (Myrtle family)
Eucalyptus, Eucalypt
Myrtus, Myrtle
Psidium, Guava
Nothofagaceae (Southern Beech family)
Nothofagus, Southern beech
Nyssaceae (Tupelo family; sometimes included in Cornaceae)
Davidia involucrata, Dove tree
Nyssa, Tupelo
Oleaceae (Olive family)
Fraxinus, Ash
Olea, Olive etc.
Paulowniaceae (Paulownia family)
Paulownia, Foxglove Tree
Platanaceae (Plane family)
Platanus, Plane
Rhizophoraceae (Mangrove family)
Rhizophora, Red mangrove etc.
Rosaceae (Rose family)
Crataegus, Hawthorn
Malus, Apple
Prunus, Almond, Peach, Apricot, Plums, Cherries etc.
Pyrus, Pear
Sorbus, Rowans, Whitebeams etc.
Rubiaceae (Bedstraw family)
Coffea, Coffee
Rutaceae (Rue family)
Citrus, Citrus
Phellodendron, Cork-tree
Tetradium, Euodia
Salicaceae (Willow family)
Populus, Poplars and Aspens
Salix, Willow
Sapindaceae (including Aceraceae, Hippocastanaceae) (Soapberry family)
Acer, Maple
Aesculus, Buckeye, Horse-chestnut
Koelreuteria, Golden rain tree
Litchi sinensis, Lychee
Ungnadia speciosa, Mexican Buckeye
Sapotaceae (Sapodilla family)
Argania spinosa, Argan
Palaquium, Gutta-percha
Sideroxylon, Tambalacoque ("dodo tree") etc.
Simaroubaceae family
Ailanthus, Tree of heaven
Theaceae (Camellia family)
Gordonia, Gordonia
Stewartia, Stewartia
Thymelaeaceae (Thymelaea family)
Gonystylus, Ramin
Ulmaceae (Elm family)
Ulmus, Elm
Zelkova, Zelkova
Verbenaceae family
Tectona, Teak
About 10 Monocotyledon families include trees.
Agavaceae (Agave family)
Yucca, Joshua tree etc.
Arecaceae (Palmae) (Palm family)
Areca, Areca
Cocos nucifera, Coconut
Phoenix, Date Palm etc.
Trachycarpus, Chusan Palm etc.
Laxmanniaceae family
Cordyline, Cabbage etc.
Poaceae (grass family)
Bamboos Poaceae subfamily Bambusoideae, around 92 genera
Ruscaceae family
Dracaena, Dragon tree
Note that banana 'trees' are not actually trees; they are not woody nor is the stalk perennial.
17 magnoliid families include trees.
Annonaceae (Custard apple family)
Annona, Cherimoya, Custard apple, Soursop etc.
Asimina, American Pawpaw
Lauraceae (Laurel family)
Cinnamomum, Cinnamon etc.
Laurus, Bay Laurel etc.
Persea, Avocado etc.
Magnoliaceae (Magnolia family)
Liriodendron, Tulip tree
Magnolia, Magnolia
Myristicaceae (Nutmeg family)
Myristica, Nutmeg
7 families, all of them include trees.
Araucariaceae (Araucaria family)
Agathis, Kauri
Araucaria, Araucaria
Wollemia nobilis, Wollemia
Cupressaceae (Cypress family)
Chamaecyparis
Cryptomeria japonica, Sugi
Cupressus, Cypress
Fitzroya cupressoides, Alerce or Patagonian cypress
Juniperus, Juniper
Metasequoia glyptostroboides, Dawn Redwood
Sequoia sempervirens, Coast Redwood
Sequoiadendron giganteum, Giant Sequoia
Taxodium, Bald Cypress
Thuja, Western Redcedar etc.
Pinaceae (Pine family)
Abies, Fir
Cedrus, Cedar
Larix, Larch
Picea, Spruce
Pinus, Pine
Pseudotsuga, Douglas-fir
Podocarpaceae (Yellowwood family)
Afrocarpus, African Yellowwood etc.
Dacrycarpus, Kahikatea etc.
Dacrydium, Rimu etc.
Podocarpus, Totara etc.
Prumnopitys, Miro etc.
Sciadopityaceae family
Sciadopitys verticillata, Kusamaki
Taxaceae (Yew family)
Taxus, Yew
Only one species.
Ginkgoaceae (Ginkgo family)
Ginkgo biloba, Ginkgo
2 families include trees.
Cycadaceae (Cycad family)
Cycas, Ngathu cycad etc.
Zamiaceae (Zamia family)
Lepidozamia, Wunu cycad etc.
Cyatheaceae
Cyathea
Dicksoniaceae
Dicksonia
Wattieza, the earliest known tree