Genus, all trees

Abies

Abies

A genus of firs consisting of 48–56 species of evergreen coniferous trees.
Acacia

Acacia

 Genus of trees and shrubs also known as Thorntrees, Whistling thorns and Wattles.
Acca

Acca

The genus Acca is in the family Myrtaceae
Acer

Acer

A large and important species consisting of chiefly decidous trees. The hardy species are widely spread over the three northern continents.
Aesculus

Aesculus

All Aesculus thrive well in the southern half of England and most are hardy enough to succeed in any part of the UK.
Ailanthus

Ailanthus

Ailanthus Genus A group of tall trees found in temperate and tropical Asia. Mainly represented in cultivation by A.altissima ‘The Tree of Heaven’.
Alnus

Alnus

Particularly useful in wet conditions or at the edge of water features.
Amelanchier

Amelanchier

A genus of small trees found wild in Europe, Asia and most frequently in North America. Cultivation is easy and Amelanchier will thrive in any soil providing extremes of wet or dry are avoided.
Aralia

Aralia

This genus comprises a selection of 68 species of both deciduous and evergreen trees and shrubs that are native to Asia and the Americas.
Araucaria

Araucaria

Araucaria Genus This is a genus comprising of 19 evergreen coniferous trees. Trees within this genus are mainly tall and erect in stature and can reach from 30-80m in height.
Arbutus

Arbutus

Arbutus Genus A group of evergreen trees and shrubs. Arbutus can be included in the small group of ericaceous plants which will grow successfully in either acid or alkaline conditions.
Betula

Betula

Birches comprise some 60 species of deciduous trees native to northern temperate regions. 
Broussonetia

Broussonetia

Broussonetia Genus Closely related to mulberries, but less woody, there are two species in general cultivation originating from N E Asia.
Buxus

Buxus

This large shrub can occasionally be classified as a small tree and is a clonal selection of common box that won the Award of Garden Merit in 2002.
Callistemon

Callistemon

Callistemon Genus This is a genus of 34 shrubs and small trees that are mainly endemic to Australia. They are commonly referred to as Bottle brush trees.
Calocedrus

Calocedrus

A small genus of three species of evergreens related to Thuja. They are native to S E Asia and North America.
Camellia

Camellia

Camellia Genus This is a genus containing between 100 and 250 species of flowering plants native to Eastern and Southern Asia.
Carpinus

Carpinus

Although there are about 45 species of hornbeam, barely half of them are in cultivation.
Carya

Carya

Hickory. This genus is mainly a North Americaqn one but there are a few Asian species also.
Castanea

Castanea

This genus was probably native to western Asia. It has been cultivated for more than 3000 years and today it occurs in wild or naturised populations throughout Southern Europe, North Africa and South
Catalpa

Catalpa

Catalpa Genus Beautiful, summer flowering trees, this small genus has about 11 species.
Cedrus

Cedrus

Cedar. A great many species in the Cupressaceae are also commonly referred to as cedars, so species of Cedrus are sometimes identified as true cedars.
Celtis

Celtis

Celtis Genus Sometimes known as Nettle Trees, these deciduous trees, of which there are around 60 species, are related to Elms.
Cercidyphyllum

Cercidyphyllum

This genus of two species native to East Asia has uncertain affinities. It is thought to be related either to Euptelea or Liriodendron. The genus is the only member of the family Cercidyphyllaceae.
Cercis

Cercis

This distinct genus has seven leguminous species which are very similar to each other, but markedly different from all other Leguminosae.
Chamaecyparis

Chamaecyparis

False cypresses are made up of five species of evergreen trees, which are natives of North America, Taiwan and Japan. These few species have given rise to an enormous number of cultivars.
Chitalpa

Chitalpa

Chitalpa Genus A hybrid of Catalpa and Chilopsis.
Clerodendrum

Clerodendrum

This is a large genus of more than 400 species of trees, shrubs and climbers, but only three are hardy in Britain.
Cornus

Cornus

A genus of around 50 species ranging from creeping shrubs to trees, they are widely distributed mainly in temperate areas.. Most are ornamental in different ways and are easy to cultivate.
Corylus

Corylus

Corylus Genus Hazels are well-marked, deciduous trees and shrubs. The genus comprises around 10 species, many of which are cultivated for their edible nuts.
Cotinus

Cotinus

Smoke bush or Smoke tree is a genus of two species of flowering plants, closely related to the sumacs, family Anacardiacea  
Crataegus

Crataegus

Crataegus Genus Thorns are some of the hardiest and most adaptable trees, thriving in conditions which would be intolerable to many others.
Cryptomeria

Cryptomeria

This is a monotypic genus of conifer, meaning that it is the only one of its type in the genus. It is a member of the Cypress family.
Cupressocyparis

Cupressocyparis

Cupressocyparis Genus A genus of hybrids between Cupressus and Chamaecyparis, all of which have arisen in cultivation.
Cupressus

Cupressus

Cupressus Genus This small genus of coniferous, evergreen trees does well in a wide range of soil types.
Cydonia

Cydonia

The quince is the only member of the genus Cydonia in the family Rosaceae.
Davidia

Davidia

A single species genus, it is believed to have the same ancestors as Cornaceae and Nyssaceae.
Eucommia

Eucommia

Eucommia is a genus of small trees now native to China
Euodia

Euodia

This is a plant genus of the Rutaceae family.
Euonymus

Euonymus

Euonymus Genus A wide ranging genus of more than 170 species, it includes deciduous and evergreen small trees.
Fagus

Fagus

Beeches are confined to the northern hemisphere and this genus of about ten species includes some of the most stately of all trees.
Ficus

Ficus

Figs - a vast genus of more than 800 species, only a few are hardy in Britain.
Ginkgo

Ginkgo

This single species genus was once regarded as a distinct member of the Yew family, it is now placed in its own order– the Gingkoales – of which it is the sole living member.
Gleditsia

Gleditsia

A genus of 12 spiny, deciduous species, all but one of which originate in North America and Asia.
Hamamelis

Hamamelis

This is a genus of deciduous shrubs or small trees growing between 3 and 8m tall.
Hibiscus

Hibiscus

This is a large genus of approximately 200-220 species that are native to the warm temperate and sub-tropical regions of the world. This genus is characterised by a display of showy flowers.
Ilex

Ilex

A large genus of deciduous and evergreen trees and shrubs, the most valuable are the evergreens.
Juglans

Juglans

  The walnut genus has some 20 species, of which just under half are in cultivation. Beautiful trees which are highly prized for their ornamental value and for their timber.
Juniperus

Juniperus

Juniperus Genus This is a genus of 50-67 plants and trees that are largely found throughout the Northern Hemisphere .
Koelreuteria

Koelreuteria

  A genus of three species native to China and Taiwan.
Laburnum

Laburnum

Very closely related to Cytisus, this genus of just two species provides wonderful colour in early summer, earning its name in German of Goldregen (Golden Rain).
Lagerstroemia

Lagerstroemia

This genus of some 50 species was named by Linnaeus after his friend Magnus von Lagerström of Gothenburg.
Larix

Larix

There are 11 species in the larch genus, and they are unusual in being deciduous conifers.
Laurus

Laurus

This is a genus of evergreen trees. It is a very ancient genus whose fossils have been traced back to before the Pleistocene glaciations.
Ligustrum

Ligustrum

Of the sixteen hardy species of Privet, all but Common Privet, which is found in Europe, originate in China and Japan.
Liquidambar

Liquidambar

This small genus is similar to the Maples (Acer), but Liquidambars have alternate rather than opposite leaves.
Liriodendron

Liriodendron

This two species genus is closely related to Magnolias, but it differs in having truncate rather than pointed leaves.
Magnolia

Magnolia

More than 120 species of deciduous and evergreen trees and shrubs comprise this genus of outstandingly attractive subjects.
Malus

Malus

The genus of flowering crabs is made up of 25 deciduous trees, and was once linked generically with Pyrus.
Mespilus

Mespilus

This single species genus is related to Crataegus, but differs in having solitary flowers.
Metasequoia

Metasequoia

A single species genus and commonly referred to as a living fossil.
Morus

Morus

This small genus of mulberries includes cultivated forms of great elegance and longevity.
Nothofagus

Nothofagus

Southern beeches are a small genus, varying in degrees of hardiness.
Nyssa

Nyssa

Noted for their good autumn colour, eleven species make up this genus which is allied to the Cornaceae, but now has its own group Nyssaceae.
Olea

Olea

Olives are evergreen trees from tropical or warm temperate areas of the Old World. There are more than 40 species in the genus.
Osmanthus

Osmanthus

Is a genus of approximately 30 species of flowering plants in the Olaeceae family
Ostyra

Ostyra

Around ten species comprise this genus, resembling the hornbeam and producing hop-like fruits in autumn.
Parrotia

Parrotia

This genus of just one species is named for F W Parrot, who made the first ascent of Mount Ararat in 1829.
Paulownia

Paulownia

It is likely that Paulownia and Catalpa come from the same ancestry. This small genus of six deciduous trees was named for Anna Paulowna, Hereditary Princess of the Netherlands.
Phellodendron

Phellodendron

This genus is a genus of deciduous trees collectively known as Cork trees. The Common name is derived from the corky like bark that some of the tree species exhibit.
Photinia

Photinia

This genus of large, generally evergreen shrubs is allied to the thorns (Crataegus).
Phyllostachys

Phyllostachys

This genus of bamboos has around 35 species, all originating from the Far East.
Picea

Picea

There are around 35 species in the spruce genus, including Picea abies, widely regarded as our Christmas tree.
Pinus

Pinus

This is a genus of around 110 species of evergreen trees, widely distributed in temperate regions of the northern hemisphere and south to Indonesia and central America.
Platanus

Platanus

Planes are quite different from any other group of trees and constitute in themselves the Platanaceae family. Magnificent large trees!
Populus

Populus

A genus of 35 generally fast growing trees, poplars are widely distributed throughout northern temperate regions.
Prunus

Prunus

This genus of some 400 species is surely unbeatable for providing spring and early summer colour. There is a Prunus for every situation and location.
Pterocarya

Pterocarya

A fast growing and often wide spreading genus of about ten species.
Pyrus

Pyrus

The Pears form a genus of about 20 species of generally deciduous trees and shrubs. They are natives of temperate areas of the Old World.
Quercus

Quercus

Oaks form a large genus of 500 species, comprising deciduous and evergreen trees, and occasionally shrubs. Only about 70 species are in cultivation.
Rhus

Rhus

There are around 200 species in the Sumach genus, and they are generally easy to grow and undemanding in their requirements.
Robinia

Robinia

This genus of ten species is confined to the USA and to Mexico. Easy to grow and tolerant of a wide range of conditions.
Salix

Salix

The Willows make a large and diverse genus of more than 300 and sometimes regarded as up to 500 species. Mankind has used willow for a wide range of purposes since pre-historic times.
Sequoia

Sequoia

A single species genus named after Sequoiah, who invented the Cherokee alphabet.
Sequoiadendron

Sequoiadendron

This single species genus was once included in Sequoia.
Sophora

Sophora

A genus of some 50 deciduous and evergreen trees, most of which do best in full sun.
Sorbus

Sorbus

A very large and important genus, many of which are ornamental. Included are whitebeams and rowans (mountain ash).
Syringa

Syringa

Syringa Genus There are reportedly over 900 varieties of Syringa vulgaris cultivars with many similar to each other but we major on just the five which make fine small multi stem trees.
Tamarix

Tamarix

A genus of around 50 small trees and shrubs, they have excellent wind resistance and are very good for coastal locations.
Taxodium

Taxodium

A genus with just two species, these are deciduous cypresses.
Taxus

Taxus

Yews are a small genus of about ten species of evergreen trees and shrubs.
Thuya

Thuya

A genus of five species of evergreen trees and shrubs, they are widely distributed in northern temperate areas.
Tilia

Tilia

There are 45 species of deciduous trees in the Lime or Linden genus, and they hybridise readily when grown from seed.
Trachycarpus

Trachycarpus

A small genus of eight species belonging to the Palmae group, only T fortunei is hardy in Britain.
Ulmus

Ulmus

Elms have been under threat in recent years, but are making a comeback. They do well in a wide range of conditions.
Zelkova

Zelkova

This genus is made up of five species of trees, four of which are native to Asia and one of which comes from Crete.