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Useful Tropical Plants

Eucalyptus propinqua

H.Deane & Maiden

Myrtaceae

+ Synonyms

Common Name: Grey Gum

Eucalyptus propinqua
This beautiful tree has multicolored bark. Sometimes cream, grey, orange and fawn. The bark changes during the different seasons of the year.
Photograph by: Pete The Poet
Creative Commons License
Eucalyptus propinqua Eucalyptus propinqua Eucalyptus propinqua Eucalyptus propinqua Eucalyptus propinqua Eucalyptus propinqua

General Information

Eucalyptus propinqua is an evergreen tree with an open, moderately small crown; it can grow 35 - 40 metres tall. The straight bole can be free of branches for 50 - 65% of the total tree height and up to 110cm in diameter[
299
Title
Protabase - Plant Resources of Tropical Africa.
Publication
 
Author
 
Website
http://www.prota.org
Publisher
 
Year
0
ISBN
 
Description
An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
,
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
,
1658
Title
Eucalypts for Planting
Publication
FAO Forestry Series No.11
Author
Jacobs M.R.
Website
http://www.fao.org
Publisher
FAO; Rome
Year
1981
ISBN
92-5-100570-2
Description
An excellent publication, rather dated now but with a wealth of information about the Eucalypts. It can be downloaded from the Internet as a PDF file.
].
The tree yields an important construction timber in Australia and so is commonly harvested from the wild. It has given good results after planting in Rwanda and Zimbabwe[
299
Title
Protabase - Plant Resources of Tropical Africa.
Publication
 
Author
 
Website
http://www.prota.org
Publisher
 
Year
0
ISBN
 
Description
An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
].

Known Hazards

Citronellal, an essential oil found in most Eucalyptus species is reported to be mutagenic when used in isolation[
269
Title
Handbook of Energy Crops
Publication
 
Author
Duke. J.
Publisher
-
Year
1983
ISBN
-
Description
Published only on the Internet, excellent information on a wide range of both temperate and tropical plants.
].
In large doses, oil of eucalyptus, like so many essential oils has caused fatalities from intestinal irritation[
269
Title
Handbook of Energy Crops
Publication
 
Author
Duke. J.
Publisher
-
Year
1983
ISBN
-
Description
Published only on the Internet, excellent information on a wide range of both temperate and tropical plants.
]. Death is reported from ingestion of 4 - 24 ml of essential oils, but recoveries are also reported for the same amount[
269
Title
Handbook of Energy Crops
Publication
 
Author
Duke. J.
Publisher
-
Year
1983
ISBN
-
Description
Published only on the Internet, excellent information on a wide range of both temperate and tropical plants.
]. Symptoms include gastroenteric burning and irritation, nausea, vomiting, diarrhoea, oxygen deficiency, ,weakness, dizziness, stupor, difficult respiration, delirium, paralysis, convulsions, and death, usually due to respiratory failure[
269
Title
Handbook of Energy Crops
Publication
 
Author
Duke. J.
Publisher
-
Year
1983
ISBN
-
Description
Published only on the Internet, excellent information on a wide range of both temperate and tropical plants.
].

Botanical References

365
Title
Flora of New South Wales
Publication
 
Author
 
Website
http://plantnet.rbgsyd.nsw.gov.au/floraonline.htm
Publisher
 
Year
0
ISBN
 
Description
An on-line resource giving a brief botanical description of all the native plants of New South Wales, their habitat and range, together with diagrams and photographs of the plants.

Range

Australia - northern New South Wales, southern Queensland.

Habitat

Locally frequent, in wet coastal forest on soils of low to medium fertility; at elevations up to 350 metres[
365
Title
Flora of New South Wales
Publication
 
Author
 
Website
http://plantnet.rbgsyd.nsw.gov.au/floraonline.htm
Publisher
 
Year
0
ISBN
 
Description
An on-line resource giving a brief botanical description of all the native plants of New South Wales, their habitat and range, together with diagrams and photographs of the plants.
,
1658
Title
Eucalypts for Planting
Publication
FAO Forestry Series No.11
Author
Jacobs M.R.
Website
http://www.fao.org
Publisher
FAO; Rome
Year
1981
ISBN
92-5-100570-2
Description
An excellent publication, rather dated now but with a wealth of information about the Eucalypts. It can be downloaded from the Internet as a PDF file.
].

Properties

Other Uses Rating *  *  *
HabitEvergreen Tree
Height35.00 m
PollinatorsBees, Insects
Cultivation StatusCultivated, Wild

Cultivation Details

Eucalyptus propinqua is native to the warm temperate and subtropical climate of eastern Australia, where it is found at elevations up to 350 metres. Rainfall occurs mainly in the summer, with a mean annual rainfall within the range 875 - 1,400mm and a dry season that is not severe of up to 4 months. The mean maximum temperature of the hottest month is 27 - 33°c; mean minimum temperature of the coldest month is 4 - 10°c, and there are generally around 1 - 10 frosts a year[
1658
Title
Eucalypts for Planting
Publication
FAO Forestry Series No.11
Author
Jacobs M.R.
Website
http://www.fao.org
Publisher
FAO; Rome
Year
1981
ISBN
92-5-100570-2
Description
An excellent publication, rather dated now but with a wealth of information about the Eucalypts. It can be downloaded from the Internet as a PDF file.
]. When dormant, the plant can survive temperatures down to about -3°c, but young growth is more tender and can be severely damaged at 0°c[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
].
Requires a sunny position, succeeding in a range of well-drained soils of moderate fertility[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
]. Prefers a pH in the range 6 - 7, tolerating 5.5 - 7.5[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
].
Eucalyptus species have not adopted a deciduous habit and continue to grow until it is too cold for them to do so. This makes them more susceptible to damage from sudden cold snaps. If temperature fluctuations are more gradual, as in a woodland for example, the plants have the opportunity to stop growing and become dormant, thus making them more cold resistant. A deep mulch around the roots to prevent the soil from freezing also helps the trees to survive cold conditions. The members of this genus are remarkably adaptable however, there can be a dramatic increase in the hardiness of subsequent generations from the seed of survivors growing in temperate zones[
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.
].
Eucalyptus monocultures are an environmental disaster, they are voracious, allelopathic and encourage the worst possible attitudes to land use and conservation[
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

In traditional medicine in DR Congo Eucalyptus propinqua is one of a range of Eucalyptus species that are recorded to be used for treatment of respiratory problems, fever and skin diseases[
299
Title
Protabase - Plant Resources of Tropical Africa.
Publication
 
Author
 
Website
http://www.prota.org
Publisher
 
Year
0
ISBN
 
Description
An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
].

Other Uses

The fresh leaves contain 1 - 1.8% essential oil. The main components are alpha-pinene, 1,8-cineole, and monoterpene
alcohols[
1659
Title
Eucalyptus Leaf Oils: Use, Chemistry, Distillation and Marketing
Publication
Phytochemistry June 1992
Author
Southwell I.A.
Website
https://doi.org/10.1016/0031-9422(92)80403-2
Publisher
 
Year
1992
ISBN
 
Description
An extensive list of Eucalyptus species and their essential oil content.
].

The heartwood is red to red-brown, the sapwood is pale red. The texture is coarse but uniform, the grain is interlocked. The wood is very heavy, hard, tough, stiff, very strong and very durable, though brittle. It is resistant to termites and is also fire-resistant. It is suitable for construction, flooring, interior trim, boat building, vehicle bodies, agricultural implements, mine props, railway sleepers, poles and piles[
299
Title
Protabase - Plant Resources of Tropical Africa.
Publication
 
Author
 
Website
http://www.prota.org
Publisher
 
Year
0
ISBN
 
Description
An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
,
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
,
712
Title
Timber
Publication
 
Author
Baterden J.R.
Website
http://www.biodiversitylibrary.org
Publisher
Archibaald Constable & Co.; London
Year
1908
ISBN
 
Description
An excellent book on world timbers from the early 20th Century. Obviously dated, but still containing information hard to find elsewhere. It can be downloaded from the Internet.
,
719
Title
A Manual of the Timbers of the World
Publication
 
Author
Howard A.L.
Website
http://www.biodiversitylibrary.org
Publisher
MacMillan and Co.; London.
Year
1934
ISBN
 
Description
An excellent and comprehensive book on timbers. Rather dated, but still a main source of information for many of the less known woods. It can be downloaded from the Internet.
,
1097
Title
Australian Timber handbook
Publication
 
Author
Wallis N.K.
Publisher
Angus & Robertson; Sydney
Year
1970
ISBN
0-207-12053-6
Description
A comprehensive book about the uses of timber in Australia, it includes a section with information on the properties of the more commonly used woods in Australia
,
1658
Title
Eucalypts for Planting
Publication
FAO Forestry Series No.11
Author
Jacobs M.R.
Website
http://www.fao.org
Publisher
FAO; Rome
Year
1981
ISBN
92-5-100570-2
Description
An excellent publication, rather dated now but with a wealth of information about the Eucalypts. It can be downloaded from the Internet as a PDF file.
].
The wood is used for fuel[
299
Title
Protabase - Plant Resources of Tropical Africa.
Publication
 
Author
 
Website
http://www.prota.org
Publisher
 
Year
0
ISBN
 
Description
An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
].

Propagation

Seed - no pre-treatment is required[
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.
]. Surface sow in a sunny position and make sure the compost is not allowed to dry out[
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.
,
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.
,
134
Title
Growing from Seed. Volume 2.
Publication
 
Author
Rice. G. (Editor)
Publisher
Thompson and Morgan.
Year
1988
ISBN
-
Description
Very readable magazine with lots of information on propagation. An interesting article on Ensete ventricosum.
]. Species that come from high altitudes appreciate 6 - 8 weeks cold stratification at 2°c[
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.
]. Pot up the seedlings into individual pots as soon as the second set of seed leaves has developed, if left longer than this they might not move well. The seedlings are ready for planting in the field when they are 25 - 30 cm tall, usually after 3 - 4 months.
The seed has a long viability[
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.
].
Cite as: Tropical Plants Database, Ken Fern. tropical.theferns.info. 2019-05-23. <tropical.theferns.info/viewtropical.php?id=Eucalyptus+propinqua>

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