Blackthorn (Prunus spinosa)

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Blackthorn thicket in blossom
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Blackthorn fact file

Blackthorn description

KingdomPlantae
PhylumAnthophyta
ClassMagnoliopsida
OrderRosales
FamilyRosaceae
GenusPrunus (1)

Blackthorn is a deciduous shrub that has long been popular in hedgerows because of its thorns (4). The beautiful white blossom tends to appear early in the year before the leaves, often in a very cold period following a false spring. These cold snaps are widely known as ‘blackthorn winters’ (4). Blackthorn is related to the plums. The bitter fruits it produces are known as sloes, and are used to make sloe gin (4). They are bluish-black in colour and often have a whitish bloom. The flesh is green and there is a single stone inside (2).

Also known as
blackhaw, buckthorn, scrogg, sloe, snag-bush.
Size
Leaf length: 2-4 cm (2)
Shrub height: 1-4 m (2)
Fruit diameter: 10-15 mm (2)
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Blackthorn biology

This deciduous shrub flowers from late February to early March to April (5).The flowers are pollinated by a range of insects (2).

In addition to flavouring gin, sloes are used in jellies, conserves and syrups and were made to make sloe wine, an alternative to port (5) (4). They have also been put to various uses in folk-medicine (6). The flowers are edible and the leaves have been dried and used as a substitute for tea (6). Furthermore, dyes have been obtained form the fruits, leaves and bark (5). The wood of blackthorn is extremely hard and is highly valued for making walking sticks as it shows interesting patterns and knot-holes (4).

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Blackthorn range

Widespread in Britain southwards of Sutherland and Caithness and reaching altitudes of up to 415m in Yorkshire (2). Elsewhere, this shrub is found in Europe with the exceptions of the far north and north-east, and extends as far east as Iran. It also occurs in south-western Siberia (2).

You can view distribution information for this species at the National Biodiversity Network Gateway.
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Blackthorn habitat

Typical habitats include hedgerows, woodlands, scrub, cliff slopes and screes. On shingle beaches a prostrate form of blackthorn may occur (3). This shrub can tolerate a wide range of soil types, but cannot survive in deep shade (2).

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Blackthorn status

Not threatened (3).

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Blackthorn threats

This shrub is not threatened.

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Blackthorn conservation

Conservation action is not required for this species at present.

There may be further information about this species available via the National Biodiversity Network Gateway.
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Find out more

For more on British native plants and for details of how to get involved in plant conservation visit the website of Plantlife, the wild plant charity:
www.plantlife.org.uk

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Authentication

This information is awaiting authentication by a species expert, and will be updated as soon as possible. If you are able to help please contact: arkive@wildscreen.org.uk
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Glossary

Deciduous
A plant that sheds its leaves at the end of the growing season.
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References

  1. National Biodiversity Network Species Dictionary (January 2004): http://www.nhm.ac.uk/nbn
  2. Clapham, A.R., Tutin, T.G., and Moore, D.M. (1987) Flora of the British Isles- 3rd Edition. Cambridge University Press, Cambridge.
  3. Preston, C.D., Pearman, D.A. and Dines, T.D. (2002) New Atlas of the British and Irish Flora. Oxford University Press, Oxford.
  4. Mabey, R. (1996) Flora Britannica. Sinclair-Stevenson, London.
  5. Plants for a Future (January 2004): http://www.pfaf.org/database/plants.php?Prunus+spinosa
  6. Grigson, G. (1996) The Englishman’s Flora. Helicon Publishing Ltd, Oxford.
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Blackthorn thicket in blossom  
Blackthorn thicket in blossom

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