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Populus tremula

Common name: Aspen Poplar Family: Salicaceae
Author: L. Botanical references: 11, 17, 200
Synonyms:  
Known Hazards: None known
Range: Europe, including Britain, from Iceland south and east to N. Africa, temperate Asia to Japan.
Habitat: Found in open woodlands and scrubby heathland, usually on poorer soils where it is sometimes dominant[17].
Edibility Rating (1-5): 2Medicinal Rating (1-5):2

Other Possible Synonyms:From various places across the web, may not be correct. See below.
P. tremula f. pendula[G] P. tremula var. pendula[G]
Other Common Names:From various places around the Web, may not be correct. See below.
Aspen [L,E], European Aspen [P,B], Fu I [E], I Yang [E], Ratelpopulier [D], T'Ang Ti [E],
Epithets:From a Dictionary of Botanical Epithets
tremula = trembling
Systematics:From a USDA Plants Database
Order: Salicales. Willow family
Other Range Info: From the Ethnobotany Database
China Europe

Physical Characteristics

A decidious tree growing to 18m by 10m at a fast rate. It is hardy to zone 2. It is in flower from February to March, and the seeds ripen from May to June. The flowers are dioecious (individual flowers are either male or female, but only one sex is to be found on any one plant so both male and female plants must be grown if seed is required) and are pollinated by Wind. The plant not is self-fertile. It is noted for attracting wildlife. We rate it 2/5 for edibility and 2/5 for medicinal use.

The plant prefers light (sandy), medium (loamy) and heavy (clay) soils and can grow in heavy clay and nutritionally poor soils. The plant prefers acid and neutral soils. It can grow in semi-shade (light woodland) or no shade. It requires moist or wet soil. The plant can tolerates strong winds but not maritime exposure.

Habitats and Possible Locations

Bog Garden, Woodland, Canopy.

Edible Uses

Inner bark.

Inner bark - dried, ground into a powder then added to flour and used for making bread etc[2, 115]. A famine food, it is only used when all else fails[177].

Medicinal Uses

Disclaimer

Anodyne Antiinflammatory Bach Diuretic Expectorant Febrifuge Stimulant.

The bark and the leaves are mildly diuretic, expectorant and stimulant[9, 165]. The plant is seldom used medicinally, but is sometimes included in propriety medicines for chronic prostate and bladder disorders[9].
Although no specific mention has been seen for this species, the bark of most, if not all members of the genus contain salicin, a glycoside that probably decomposes into salicylic acid (aspirin) in the body[213, 238]. The bark is therefore anodyne, anti-inflammatory and febrifuge. It is used especially in treating rheumatism and fevers, and also to relieve the pain of menstrual cramps[238].
The plant is used in Bach flower remedies - the keywords for prescribing it are 'Vague fears of unknown origin', 'Anxiety' and 'Apprehension'[209].

Other Uses

Charcoal Shelterbelt Soil conditioner Wood.

A very fast growing and wind resistant tree, it can be planted to provide a shelterbelt[11, 24]. Trees can also be planted to improve heavy clay soils in neglected woodlands[200].
Wood - very soft, elastic, easily split, rather woolly in texture, without smell or taste, of low flammability, not durable, very resistant to abrasion. It makes a high quality paper and is also used to make a very good charcoal11, 21, 46, 100, 115].

Cultivation details

A very easily grown plant, it does well in a heavy cold damp soil[1], preferring a neutral to acid soil, and avoiding calcareous soils[11, 24]. The sub-species P. tremula davidiana. (Dode.)Schneid. is tolerant of extremely alkaline soils[200]. The species generally prefers a deep rich well-drained circumneutral soil, growing best in the south and east of Britain[11, 200]. Growth is much less on wet soils, on poor acid soils and on thin dry soils[11]. This species grows well on poor soils, probably because of its intolerance of competition[186]. Plants are very tolerant of exposure[24], doing well in cold exposed sites so long as sufficient moisture is present. Plants dislike shade[186], and are intolerant of root or branch competition[200].
A fast growing tree but it is short-lived[186].
Trees produce suckers freely and can form dense thickets[186].
The aspen is a very good wildlife plant, it has over 90 associated insect species[24] and is a food plant for the green hairstreak butterfly[186].
Poplars have very extensive and aggressive root systems that can invade and damage drainage systems. Especially when grown on clay soils, they should not be planted within 12 metres of buildings since the root system can damage the building's foundations by drying out the soil[11].
Can be planted to improve heavy clay soils in neglected woodlands[200].
Dioecious. Male and female plants must be grown if seed is required.

Propagation

Seed - must be sown as soon as it is ripe in spring[113]. Poplar seed has an extremely short period of viability and needs to be sown within a few days of ripening[200]. Surface sow or just lightly cover the seed in trays in a cold frame. Prick out the seedlings into individual pots when they are large enough to handle and grow them on in the old frame. If sufficient growth is made, it might be possible to plant them out in late summer into their permanent positions, otherwise keep them in the cold frame until the following late spring and then plant them out. Most poplar species hybridize freely with each other, so the seed may not come true unless it is collected from the wild in areas with no other poplar species growing[11].
Cuttings of mature wood in November/December in a sheltered outdoor bed. This species is rather difficult from cuttings[11, 113].
Suckers in early spring[78].
Root cuttings in the winter[200].

Suppliers

Plants For A Future is working with the following groups to try and make these plants easily available. Parts of the proceeds will be donated to   so please mention us when ordering.

Cool Temperate Nurseries
10 Ivy Grove
Nottingham
NG7 7LZ
Email: philcorbett53@hotmail.com
Phone 0115 847 8302 Fax 0115 847 8302
Distribution: UK
How to order: Direct from Cool Temperate by email/phone
Notes: Many Trees supplied on their own rootstock
Last Updated: April 03
Item: Populus tremula (Aspen)

For more details of plant suppliers please see our Suppliers Page which lists many more places to look.

PFAF Web Pages

This plant is mentioned in the following web pages

Web References

References for populus tremula (a possible synonym).

References for the family Salicaceae.

See the PFAF Links Pages for other sources.

Also try Photos and info from the The Plants Database which has 14,000 images.

References

[1] F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 Oxford University Press 1951
Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaces in 1992 by a new dictionary (see [200]).

[2] Hedrick. U. P. Sturtevant's Edible Plants of the World. Dover Publications 1972 ISBN 0-486-20459-6
Lots of entries, quite a lot of information in most entries and references.

[9] Launert. E. Edible and Medicinal Plants. Hamlyn 1981 ISBN 0-600-37216-2
Covers plants in Europe. a drawing of each plant, quite a bit of interesting information.

[11] Bean. W. Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement. Murray 1981
A classic with a wealth of information on the plants, but poor on pictures.

[17] Clapham, Tootin and Warburg. Flora of the British Isles. Cambridge University Press 1962
A very comprehensive flora, the standard reference book but it has no pictures.

[24] Baines. C. Making a Wildlife Garden.
Fairly good with lots of ideas about creating wildlife areas in the garden.

[78] Sheat. W. G. Propagation of Trees, Shrubs and Conifers. MacMillan and Co 1948
A bit dated but a good book on propagation techniques with specific details for a wide range of plants.

[113] Dirr. M. A. and Heuser. M. W. The Reference Manual of Woody Plant Propagation. Athens Ga. Varsity Press 1987 ISBN 0942375009
A very detailed book on propagating trees. Not for the casual reader.

[115] Johnson. C. P. The Useful Plants of Great Britain.
Written about a hundred years ago, but still a very good guide to the useful plants of Britain.

[165] Mills. S. Y. The Dictionary of Modern Herbalism.
An excellent small herbal.

[177] Kunkel. G. Plants for Human Consumption. Koeltz Scientific Books 1984 ISBN 3874292169
An excellent book for the dedicated. A comprehensive listing of latin names with a brief list of edible parts.

[186] Beckett. G. and K. Planting Native Trees and Shrubs. Jarrold 1979
An excellent guide to native British trees and shrubs with lots of details about the plants.

[200] Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press 1992 ISBN 0-333-47494-5
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.

[209] Chancellor. P. M. Handbook of the Bach Flower Remedies C. W. Daniel Co. Ltd. 1985 ISBN 85207 002 0
Details the 38 remedies plus how and where to prescribe them.

[213] Weiner. M. A. Earth Medicine, Earth Food. Ballantine Books 1980 ISBN 0-449-90589-6
A nice book to read though it is difficult to look up individual plants since the book is divided into separate sections dealing with the different medicinal uses plus a section on edible plants. Common names are used instead of botanical.

[238] Bown. D. Encyclopaedia of Herbs and their Uses. Dorling Kindersley, London. 1995 ISBN 0-7513-020-31
A very well presented and informative book on herbs from around the globe. Plenty in it for both the casual reader and the serious student. Just one main quibble is the silly way of having two separate entries for each plant.


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