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The NHBS Guide to UK Tree Identification

Mariam Salah
Mariam Salah

Trees are a vital part of our ecosystems and essential to all life. As well as providing homes and food for a wide range of wildlife, they also provide us with oxygen and clean air, and they help to conserve water and stabilise the surrounding soil. As such, trees are invaluable both to our environment and for human well-being. 

In the UK there are more than 60 native tree species, each with its own distinctive features that can help with identification. In this blog we will focus on ten of our most common native trees and provide you with the key characteristics you need to look out for – soon you’ll be confident in recognising oak from elder and silver birch from ash. 

How to identify a tree: 

The best time to identify a tree is when it is in leaf. By looking at the size and shape of the leaves/needles, the structure of the bark, and any other features present such as seeds, berries or flowers, you have a great chance of working out what the species is. It can be a bit more tricky if you’re looking in winter when the tree is bare, but there are several good books that will help you out (take a look at our recommended reading list at the bottom of this post for our top suggestions).

Ten common British trees and how to identify them:

1. Pedunculate oak (Quercus robur)
Oak by Gedomaru via Flickr

Where to find: Also known as common or English oak, this ancient tree is one of Britain’s most iconic species, standing tall for hundreds of years. It can be found across the country in both urban and rural areas. (Not to be confused with the sessile oak which is our other native species of oak – see below for tips on distinguishing between the two).

How to identify: The pedunculate oak is a large deciduous tree growing up to 40m tall. It has grey bark when young which becomes darker brown and develops long vertical fissures as it ages. Leaves have familiar deep-lobed margins with smooth edges. Acorns hang from the tree on long stalks. 

Pedunculate oak leaves have smooth-lobed edges and acorns grow singly at the end of long stems. Image via Wikimedia Commons.

Look out for: If you aren’t sure whether you’re looking at a pedunculate oak or a sessile oak, there are a couple of things you can check for. Pedunculate oak leaves have quite a short stem and more pronounced lobes at the bottom of the leaf. Acorns grow singly at the end of a long stem. Sessile oak leaves have a shorter stem and do not have lobes near the stem. Their acorns grow in clusters that are attached directly to the outer twigs.

2. Ash (Fraxinus excelsior)
Ash tree by David Radcliffe via Flickr

Where to find: Ash is a common, widespread tree often found among British hedgerows and in many mixed deciduous woods in the UK.

How to identify: Ash grows up to a height of 30–40m. The bark is pale brown and fissures as the tree ages. Leaves are pinnately compound, usually comprising three to six opposite pairs of light green, oval leaflets. The buds are a sooty black with upturned grey shoots.

Ash leaves showing a small black bud at the base. Image via Wikimedia Commons.

Look out for:  Sadly, ash is also identified by a serious disease called ash dieback (or chalara) that is a substantial threat to the species. The fungus appears as black blotches on the leaves and affected trees usually die within a couple of years.

3. Common Lime (Tilia x europaea)
Lime tree by louis.quinzexv via Flickr

Where to find: The sweet smelling lime is native to much of Europe. Although rare in the wild, it is commonly found in parks and along residential streets.

How to identify: Common lime is a tall, broadleaf tree with dark green heart-shaped leaves which are are mostly hairless, except for cream or white hairs on the underside of the leaf between the joints of the veins. It is known for its sweet smelling white-yellow flowers, that hang in clusters of two to five and that develop into round, oval fruits with pointed tips. 

Lime leaves are heart shaped and delicate. Image via Wikimedia Commons.

Look out for: The common lime can be distinguished from other lime varieties by the tufts of white hair at the end of its twigs (in small-leaved lime hairs are red, and large-leaved lime has them all over the underside). 

4. Hawthorn (Crataegus monogyna)
Hawthorn by David Lee via Flickr

Where to find: An ancient tree steeped in mythology and folklore, hawthorn is most commonly found growing in hedgerows, woodland and scrub. 

How to identify: Hawthorn has dense, thorny foliage and, if left to fully mature, can grow to a height of 15m. The shiny lobed leaves are among the first to appear in spring. It’s five-petalled flowers are white or pink and grow in flat topped clusters. In autumn and winter, trees are covered in deep red fruits known as haws.  

Hawthorn flowers have five petals and are white or pale pink. Image via Wikimedia Commons.

Look out for: This species often hybridises with the UK’s other native hawthorn, Midland hawthorn (Crataegus laevigata). They look very similar and can be hard to tell apart.

5. Hazel (Corylus avellana)
Hazel by Stoutcob via Flickr

Where to find: Used regularly for coppicing, hazel can be found in a range of habitats, including woodlands, gardens and grasslands. 

How to identify: A small shrubby tree with smooth, grey-brown bark, hazel can reach up to 12m in height if left uncoppiced. Its leaves are oval, toothed, and have soft hairs on their underside. In late winter, before the leaves have grown, it produces long yellow catkins that hang in clusters. These later develop into hazelnuts.

Hazel produces long yellow catkins which hang in small clusters. Image via Wikimedia Commons.

Look out for: Easily confused with English elm, they can be distinguished by the shape and feel of the leaves. Elm leaves have an asymmetric base and have rough feeling hairs.  Hazel leaves are symmetrical at the base and feel soft and downy. 

6. Common Alder (Alnus glutinosa)
Alder via Flickr

Where to find: Common alder enjoys moist ground and so can be found along riversides, fens and wet woodlands, often providing shelter to fish. Interestingly, alder wood does not rot when it becomes wet, but instead becomes stronger and harder.

How to identify: Alder is a deciduous tree that grows to 25m. It is broadly conical in shape, and the bark is dark and fissured. Leaves are racquet-shaped and tough. Female catkins are present on the tree all year round and look like small green or brown cones. Male catkins also appear on the same tree and are longer and thinner. Alder can also be recognised by its purple buds and purple twigs with orange markings in winter. 

Female catkins become woody and cone-like towards the winter when they open up to release their seeds. Image via Wikimedia Commons.

Look out for: Can be confused with hazel – they can be told apart by the appearance of the leaves which are shiny and leathery in comparison to the soft downy leaves of the hazel.

7. Holly (Ilex aquifolium)
Holly by Douglas Cox via Flickr

Where to find: A favourite in Christmas decorations, holly is widespread and found commonly in woodland, scrub and hedgerows. 

How to identify: This easy-to-recognise evergreen tree has smooth bark with small warts and dark brown stems. Its shiny, leathery leaves usually have prickles along the edges, but can also be smooth in older trees. It can grow up to 15m in height and produces scarlet berries that remain on the plant throughout the winter. 

Holly leaves on younger trees have sharp prickles around the edge of their tough, leathery leaves. Image via Wikimedia Commons.

Look out for: Although holly leaves usually have prickles, those on older trees or that are on the upper parts of the plant often have smoother edges.

8. White Willow (Salix alba)
Salix alba via Wikimedia Commons

Where to find: The weeping, romantic willow can be spotted growing in wet ground, often along riverbanks and around lakes where it trails its branches into the water. 

How to identify: White willow is a the largest species of willow in the UK, growing up to 25m with an irregular, leaning crown. Its foliage appears silvery due to its pale, oval leaves that carry silky, white hairs on the underside. In early spring look out for its long yellow catkins and in winter try to spot the green-yellow narrow buds that grow close to the twig.

White willow leaves appear silvery due to the downy hairs on the underside. Image via Wikimedia Commons.

Look out for: There are several species of willow in the UK, including white willow, grey willow, weeping willow, goat willow and crack willow. These often hybridise in the wild.

9. Silver Birch (Betula pendula)
Silver Birch by Jan Roles via Flickr

Where to find: A pioneer species, silver birch is a popular garden tree, and thrives in moorlands, heathland and dry and sandy soils.

How to identify: Silver birch can be easily recognised by its silver, papery bark which sheds like tissue paper. It has drooping branches and can reach 30m in height. Leaves are triangular-shaped with toothed edges and grow from hairless leaf stalks. In spring, flowers appear as yellow-brown catkins that hang in groups. Once pollinated, female catkins thicken and darken to a crimson colour. 

Birch catkins are often described as ‘lambs tails’. Image via Wikimedia Commons.

Look out for: Silver birch is monoecious, meaning that both male and female catkins are found on the same tree. In April and May, try to distinguish the long yellow-brown male catkins from the short, erect green females ones.

10. Elder (Sambucus nigra)
Elder by Rüdiger Heiß via Flickr

Where to find: Historically known for its magical properties and hugely favoured by foragers, elder appears in hedges, scrub, woodland, waste and cultivated ground.

How to identify:  Elder can grow to around 15m and has a short, greyish-brown trunk that develops deep creases as it ages. It has compound leaves; each leaf divided into five to seven leaflets. In summer, elder is recognised by its creamy, sweet-smelling white flowers that hang in sprays. In the autumn these develop into bunches of deep, purple berries. 

In the spring the elder tree features sprays of fragrant white flowers. Image via Wikimedia Commons.

Look out for: In winter, elder twigs are green and have an unpleasant smell. They have a white soft pith inside.

Recommended reading and guides:

Collins Tree Guide: The Most Complete Field Guide to the Trees of Britain and Europe

An essential, definitive guide to the trees of Britain and non-Mediterranean Europe. Containing some of the finest original tree illustrations ever produced, this is one of the most important tree guides to have appeared in the last 20 years.



The Tree Name Trail: A Key to Common Trees

This 12-page laminated fold-out chart contains a full-colour illustrated key to the leaves, twigs, fruits and seeds of the commonest broadleaved and coniferous trees of Britain and Ireland.




Tree-Spotting: A Simple Guide to Britain’s Trees

A beautiful and captivating insight into the wonderful world of trees, Tree-Spotting burrows down into the history and hidden secrets of each species. It explores how our relationship with trees can be very personal, and hopes to bring you closer to the natural world around you.



RSPB First Book of Trees

Through beautiful full-page illustrations accompanied by key information about each tree, the First Book of Trees is designed to encourage young children’s interest in the outside world and the trees they encounter during their adventures.




Tree Story: The History of the World Written in Trees

A dendrochronological delight, the beautifully written and illustrated Tree Story reveals the utterly fascinating world of tree-ring research and how it matters to archaeology, palaeoclimatology and environmental history.




Winter Trees: A Photographic Guide to Common Trees and Shrubs

This AIDGAP guide covers 36 of the common broad-leaved deciduous species, or groups of species, that are most likely to be found in the UK, as well as a few rarer trees. It provides all the information you need to begin identifying trees in winter from their buds, bark, size and habitat.



Identification of Trees and Shrubs in Winter using Buds and Twigs

A practical guide to identifying trees and shrubs in winter. Comprehensive and easy to use, it contains over 700 species identifiable via their winter buds and twigs. The illustrated identification keys are easy to use, and a summary set of keys are provided as an appendix.