Alnus japonica
(Thunb.) Steud.
Betulaceae
Alnus × borealis koreana (Callier) Nakai
Alnus harinoki Siebold
Alnus japonica Siebold & Zucc.
Alnus maritima arguta Regel
Alnus maritima japonica (Thunb.) Regel
Alnus reginosa Nakai
Betula japonica Thunb.
Common Name: Japanese Alder
Cultivated tree
Photograph by: KENPEI
General Information
Japanese alder is a shrub or tree with a dense crown; it usually grows 3 - 10 metres tall, exceptionally to 20 metres[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. The bole can be up to 70cm in diameter; it is usually short, especially in trees grown in the open where the lower branches are generally retained[
74- Title
- Flora of the USSR.
- Publication
-
- Author
- Komarov. V. L.
- Website
- http://www.biodiversitylibrary.org
- Publisher
- Israel Program for Scientific Translation
- Year
- 1968
- ISBN
- -
- Description
- An immense (25 or more large volumes) and not yet completed translation of the Russian flora. Full of information on plant uses and habitats but heavy going for casual readers. It can be downloaded from the Internet.
,
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. Deciduous in most of its range, the tree has adopted an evergreen habit where it is grown in the Philippines[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
The tree is a popular fuel, harvested from the wild for local use. It also has medicinal properties and is a source of wood and dyes. It is grown in reforestation projects, to provide shade in plantations and to stabilize and recondition the soil. It is sometimes grown as an ornamental[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
This species has a fairly wide distribution, and there are no known threats impacting ts survival. The plant is classified as 'Least Concern' in the IUCN Red List of Threatened Species(2013)[
338- Title
- IUCN Red List of Threatened Species
- Publication
-
- Author
-
- Website
- http://www.iucnredlist.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- A list of plants under threat and facing possible extinction, usually with brief details of the threats and information on habitat.
].
Known Hazards
None known
Botanical References
11- Title
- Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement.
- Publication
-
- Author
- Bean. W.
- Publisher
- Murray
- Year
- 1981
- ISBN
- -
- Description
- A classic with a wealth of information on the plants, but poor on pictures.
,
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
,
266- Title
- Flora of China
- Publication
-
- Author
-
- Website
- http://flora.huh.harvard.edu/china/
- Publisher
- Missouri Botanical Garden Press; St. Louis.
- Year
- 1994
- ISBN
-
- Description
- An excellent, comprehensive resource in 25 volumes. In addition to the botanical information the flora also gives basic information on habitat and some uses. An on-line version is also available.
Range
E. Asia - Russian Far East, China, Japan, Korea, Taiwan.
Habitat
Wet soils along streams and in swamps and also on exposed soils. In Japan, it occurs in marsh or swamp forest with a high water table and soil conditions tending to be anaerobic with high clay and organic matter contents[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
Properties
Conservation Status | Least Concern |
Medicinal Rating | |
Other Uses Rating | |
Habit | Deciduous Tree |
Height | 8.00 m |
Growth Rate | Fast |
Pollinators | Wind |
Cultivation Status | Cultivated, Ornamental, Wild |
Cultivation Details
Alnus japonica is a plant mainly of temperate regions where it can experience very cold winters. It does also extend south to Taiwan where it enjoys a subtropical climate and is also cultivated in the Philippines, usually at higher elevations.
Grows best in a sunny position, but is shade tolerant[
310- Title
- Plant Resources of Southeast Asia
- Publication
-
- Author
-
- Website
- http://proseanet.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Lots of information on the uses of the plants of SE Asia.
]. Prefers a heavy soil and a damp situation, but it succeeds in ordinary garden soil[
11- Title
- Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement.
- Publication
-
- Author
- Bean. W.
- Publisher
- Murray
- Year
- 1981
- ISBN
- -
- Description
- A classic with a wealth of information on the plants, but poor on pictures.
]. Grows well in heavy clay soils[
11- Title
- Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement.
- Publication
-
- Author
- Bean. W.
- Publisher
- Murray
- Year
- 1981
- ISBN
- -
- Description
- A classic with a wealth of information on the plants, but poor on pictures.
]. It does not require fertile soil, but prefers permeable soils and should not be planted in compact soils[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. Thrives in drier soils than many members of this genus[
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. Tolerates very infertile sites[
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. Tolerant of inundation of the soil, under such conditions the tree retains its leaves and can almost maintain its growth rate by forming adventitious roots[
310- Title
- Plant Resources of Southeast Asia
- Publication
-
- Author
-
- Website
- http://proseanet.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Lots of information on the uses of the plants of SE Asia.
].
A fast-growing tree - on fertile sites, poles and firewood can be harvested after 5 years, small-diameter timber can be harvested in less than 10 years[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
The tree responds well to coppicing[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
This species has a symbiotic relationship with certain soil micro-organisms, these form nodules on the roots of the plants and fix atmospheric nitrogen. Some of this nitrogen is utilized by the growing plant but some can also be used by other plants growing nearby[
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
].
Edible Uses
None known
Medicinal
The stembark and leaves are used in the treatment of cancer, gastric disorders, hepatitis and fatty liver[
360- Title
- Philippine Medicinal Plants
- Publication
-
- Author
-
- Website
- http://www.stuartxchange.org/CompleteList.html
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- A lovely site, giving brief details on the medicinal uses of several hundred (over 400 at the last count) plants in the Philippines, plus a picture of each plant.
]. In oriental traditional medicine the stems and stem-bark are used as remedies for fever, haemorrhages, diarrhoea, and alcoholism[
1254- Title
- Cytotoxicity and Pharmacogenomics of Medicinal Plants from Traditional Korean Medicine
- Publication
- Evidence-Based Complementary and Alternative Medicine; Volume 2013, Article ID 341724, 14 pages
- Author
- Kuete V.; Ean-Jeong Seo; Krusche B.; Oswald M.; Wiench B.; S
- Website
- http://dx.doi.org/10.1155/2013/341724
- Publisher
- Hindawi Publishing Corporation
- Year
- 2013
- ISBN
-
- Description
-
]
Various species of alder, including this species, seem to contain antitumour compounds[
218- Title
- Medicinal Plants of China
- Publication
-
- Author
- Duke. J. A. and Ayensu. E. S.
- Publisher
- Reference Publications, Inc.
- Year
- 1985
- ISBN
- 0-917256-20-4
- Description
- Details of over 1,200 medicinal plants of China and brief details of their uses. Often includes an analysis, or at least a list of constituents. Heavy going if you are not into the subject.
].
The stems and stem-bark contain various medicinally active compounds that have cytotoxic properties and are of potential use in the treatment of cancer[
1254- Title
- Cytotoxicity and Pharmacogenomics of Medicinal Plants from Traditional Korean Medicine
- Publication
- Evidence-Based Complementary and Alternative Medicine; Volume 2013, Article ID 341724, 14 pages
- Author
- Kuete V.; Ean-Jeong Seo; Krusche B.; Oswald M.; Wiench B.; S
- Website
- http://dx.doi.org/10.1155/2013/341724
- Publisher
- Hindawi Publishing Corporation
- Year
- 2013
- ISBN
-
- Description
-
].
The plant has also been shown to be hepatoprotective; to have antioxidant activities; and antiviral activity against the
influenza virus[
1254- Title
- Cytotoxicity and Pharmacogenomics of Medicinal Plants from Traditional Korean Medicine
- Publication
- Evidence-Based Complementary and Alternative Medicine; Volume 2013, Article ID 341724, 14 pages
- Author
- Kuete V.; Ean-Jeong Seo; Krusche B.; Oswald M.; Wiench B.; S
- Website
- http://dx.doi.org/10.1155/2013/341724
- Publisher
- Hindawi Publishing Corporation
- Year
- 2013
- ISBN
-
- Description
-
].
Agroforestry Uses:
A pioneer species, succeeding in full sun and also fixing atmospheric nitrogen, the tree can be grown in reforestation projects[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
,
310- Title
- Plant Resources of Southeast Asia
- Publication
-
- Author
-
- Website
- http://proseanet.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Lots of information on the uses of the plants of SE Asia.
]. It has been planted in reforestation projects on areas of land used in mining and alo on mine waste tips[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
,
310- Title
- Plant Resources of Southeast Asia
- Publication
-
- Author
-
- Website
- http://proseanet.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Lots of information on the uses of the plants of SE Asia.
].
The tree is fast-growing and has an extensive lateral root system. It is planted to stabilize the soil on slopes and areas where there have been landslides[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
,
310- Title
- Plant Resources of Southeast Asia
- Publication
-
- Author
-
- Website
- http://proseanet.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Lots of information on the uses of the plants of SE Asia.
].
The tree is grown to provide shade in coffee plantations and as a nurse tree in Pinus kesiya plantations in the Philippines[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
,
310- Title
- Plant Resources of Southeast Asia
- Publication
-
- Author
-
- Website
- http://proseanet.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Lots of information on the uses of the plants of SE Asia.
]. It is also grown there to act as living posts, supporting wires that are used for growing chayote (Sechium edule)[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
The tree has been found to be suitable for use as bed logs for growing shiitake mushroom (Cortinellus shiitake)[
310- Title
- Plant Resources of Southeast Asia
- Publication
-
- Author
-
- Website
- http://proseanet.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Lots of information on the uses of the plants of SE Asia.
].
Other Uses
A dye is obtained from the bark[
46- Title
- Dictionary of Economic Plants.
- Publication
-
- Author
- Uphof. J. C. Th.
- Publisher
- Weinheim
- Year
- 1959
- ISBN
- -
- Description
- An excellent and very comprehensive guide but it only gives very short descriptions of the uses without any details of how to utilize the plants. Not for the casual reader.
,
61- Title
- A Dictionary of Plants Used by Man.
- Publication
-
- Author
- Usher. G.
- Publisher
- Constable
- Year
- 1974
- ISBN
- 0094579202
- Description
- Forget the sexist title, this is one of the best books on the subject. Lists a very extensive range of useful plants from around the world with very brief details of the uses. Not for the casual reader.
]. No more details are given.
The pale brown wood is medium to fine textured, close grained, moderately soft, light in weight. It seasons without excessive warping or splitting, but shrinkage figures are high. It is easy to saw and finish by hand or machine, with only slight blunting effects on tools. Planing and boring give good results while mortising and turning results are only fair with some picking up of grain. It is used for turnery[
46- Title
- Dictionary of Economic Plants.
- Publication
-
- Author
- Uphof. J. C. Th.
- Publisher
- Weinheim
- Year
- 1959
- ISBN
- -
- Description
- An excellent and very comprehensive guide but it only gives very short descriptions of the uses without any details of how to utilize the plants. Not for the casual reader.
,
61- Title
- A Dictionary of Plants Used by Man.
- Publication
-
- Author
- Usher. G.
- Publisher
- Constable
- Year
- 1974
- ISBN
- 0094579202
- Description
- Forget the sexist title, this is one of the best books on the subject. Lists a very extensive range of useful plants from around the world with very brief details of the uses. Not for the casual reader.
]. The wood is suitable for making furniture, tools, packaging[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
The wood is used for fuel and to make a good quality charcoal[
46- Title
- Dictionary of Economic Plants.
- Publication
-
- Author
- Uphof. J. C. Th.
- Publisher
- Weinheim
- Year
- 1959
- ISBN
- -
- Description
- An excellent and very comprehensive guide but it only gives very short descriptions of the uses without any details of how to utilize the plants. Not for the casual reader.
,
61- Title
- A Dictionary of Plants Used by Man.
- Publication
-
- Author
- Usher. G.
- Publisher
- Constable
- Year
- 1974
- ISBN
- 0094579202
- Description
- Forget the sexist title, this is one of the best books on the subject. Lists a very extensive range of useful plants from around the world with very brief details of the uses. Not for the casual reader.
,
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. Although the energy value of the wood is relatively low, it dries rapidly and burns easily and so is a popular fuel[
310- Title
- Plant Resources of Southeast Asia
- Publication
-
- Author
-
- Website
- http://proseanet.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Lots of information on the uses of the plants of SE Asia.
].
Propagation
Seed - best sown in a cold frame as soon as it is ripe and only just covered[
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. Spring sown seed should also germinate successfully so long as it is not covered[
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
,
K- Title
- Plants for a Future
- Author
- Ken Fern
- Description
- Notes from observations, tasting etc at Plants For A Future and on field trips.
]. The seed should germinate in the spring as the weather warms up. When large enough to handle, prick the seedlings out into individual pots. If growth is sufficient, it is possible to plant them out into their permanent positions in the summer, otherwise keep them in pots outdoors and plant them out in the spring.
If you have sufficient quantity of seed, it can be sown thinly in an outdoor seed bed in the spring[
78- Title
- Propagation of Trees, Shrubs and Conifers.
- Publication
-
- Author
- Sheat. W. G.
- Publisher
- MacMillan and Co
- Year
- 1948
- ISBN
- -
- Description
- A bit dated but a good book on propagation techniques with specific details for a wide range of plants.
]. The seedlings can either be planted out into their permanent positions in the autumn/winter, or they can be allowed to grow on in the seed bed for a further season before planting them.
Cuttings of mature wood, taken as soon as the leaves fall in autumn, outdoors in sandy soil.