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Useful Tropical Plants

Ptaeroxylon obliquum

(Thunb.) Radlk.

Rutaceae

+ Synonyms

Harrisonia lentiscoides (Engl.) Boas

Kirkia lentiscoides Engl.

Ptaeroxylon utile Eckl. & Zeyh.

Rhus obliqua Thunb.

Common Name: Sneezewood

Ptaeroxylon obliquum
Cultivated plant in the Walter Sisulu National Botanical Garden in western Roodepoort, South Africa
Photograph by: JMK
Creative Commons License
Ptaeroxylon obliquum Ptaeroxylon obliquum Ptaeroxylon obliquum

General Information

Sneezewood is a usually deciduous shrub or small to medium-sized tree usually growing up to 20 metres tall but with occasional specimens to 45 metres[
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.
]. The bole is often straight and cylindrical, usually up to 50cm in diameter, but occasionally to 120cm[
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.
].
The tree is highly valued for its timber, which has a wide range of uses. It is also gathered from the wild for medicinal use and is insect repellent. The tree has ornamental potential - a flowering tree can be a spectacular sight[
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

The wood dust is very irritating and may cause violent sneezing[
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.
].
Highly irritant, aromatic peppery oils, containing nieshoutol, are produced by the wood, causing violent sneezing by woodworkers after sawing or sanding[
295
Title
PlantZAfrica.com
Publication
 
Author
 
Website
http://www.plantzafrica.com
Publisher
 
Year
0
ISBN
 
Description
An excellent site giving detailed descriptions and uses of many S. African plants.
].

Botanical References

308
Title
Flora Zambesiaca
Publication
 
Author
 
Website
http://apps.kew.org/efloras/fz/intro.html
Publisher
 
Year
0
ISBN
 
Description
An excellent online flora of plants from the Zambezi River basin. It lists a number of the plant uses as well as the habitats and botanical descriptions of the plants.

Range

Southern Africa - Tanzania, Angola, Namibia, Zimbabwe, Botswana, Mozambique, Swaziland and S. Africa.

Habitat

Dry evergreen forest, often together with Podocarpus and Juniperus, and in bushland, at elevations from sea-level up to 2,000 metres[
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.
].

Properties

Medicinal Rating *  *
Other Uses Rating *  *  *  *
HabitDeciduous Tree
Height15.00 m
Self-fertileNo
Cultivation StatusOrnamental, Wild

Cultivation Details

A plant of tropical and subtropical areas, where it is found at elevations from sea level to about 2,000 metres[
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.
]. Tolerates moderate levels of frost[
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.
].
Thrives best in shale or lime soils, though it also succeeds in well-drained sandy or rocky soils[
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.
]. Established plants are drought tolerant[
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.
].
The tree grows moderately fast, achieving annual increments of 40 - 100cm in height under good conditions[
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.
].
Trees can be managed by coppicing, showing regrowth in about 75% of cut stems[
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.
].
Natural regeneration often occurs in forest margins, but saplings have also been recorded in Pinus plantations in South Africa. Regeneration may be abundant after severe opening of the forest canopy, and seedlings may cover the bare forest floor after disturbance[
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.
].
Dioecious, both male and female forms need to be grown if seed is required.

Edible Uses

None known

Medicinal

The wood has the scent of pepper and causes sneezing[
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.
]. The bark, the sawdust and the smoke from burning wood are used as a snuff against headache[
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.
,
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.
].
Bark and wood infusions are considered remedies for rheumatism, arthritis and heart complaints[
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.
].

The wood resin is applied to warts and is used to kill ticks on cattle[
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.
].

A tea made from the twigs is used against urinary complaints[
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.
].

The wood and leaves contain chromones and other phenolic compounds. Some of these, methylalloptaeroxylin and perforatin A, showed antihypertensive effects; 7-Hydroxychromones have anti-oxidant activity[
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.
].
The tree lacks limonoids, which are commonly found in Rutaceae[
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.
].
An alkaloid isolated from the bark showed cardiac-depressant activity[
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.
].
Dichloromethane extracts of roots, leaves and stems showed moderate in-vitro antiplasmodial activity[
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 wood chips are used to repel moths from clothes[
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.
,
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.
].
The smoke from burning wood is used as traditional pesticide for stored grain[
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.
].
The resin can be used as an insecticide[
364
Title
Field Guide to the Moist Forest Trees of Tanzania.
Publication
 
Author
Lovett J.C.; Ruffo C.K.; Gereau R.E.; Taplin J.R.D
Website
http://www.york.ac.uk/res/celp/webpages/projects/ecology/tree%20guide/introduction.htm
Publisher
Frontier
Year
0
ISBN
1-873070-33-0
Description
A lovely little book giving a basic identification guide to more than 650 species of trees growing in Tanzania. It is also available to view on the internet.
].

The heartwood is rose-red to dark red, changing to orange-brown or golden brown on exposure, and distinctly demarcated from the pale grey, narrow sapwood[
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.
]. The grain is wavy, texture fine[
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.
]. The wood is hard, heavy, tough, dense and close-grained, it has a satiny lustre and a strong peppery smell[
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.
,
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.
]. The wood is extremely durable and resistant to termite, Lyctus and marine borer attacks[
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.
].
Taking into account its hardness, the wood is not difficult to saw, but it is difficult to work because of its wavy grain. However, it can be finished to a smooth and lustrous surface. The turning properties are excellent. Pre-boring before nailing is necessary. Gluing is difficult[
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.
].
The wood is highly valued for furniture and for poles in house building. In Mozambique it is favoured for making the keys of traditional xylophones, and for this purpose it is baked in an oven. It has also been used for railway sleepers and durable fence posts. It is suitable for heavy construction including marine works, heavy flooring, vehicle bodies, handles, sporting goods, implements, toys, novelties, precision equipment, carving, pattern making, vats and 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.
,
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.
]. When used as machine bearings, sneezewood often wears longer than brass or iron[
295
Title
PlantZAfrica.com
Publication
 
Author
 
Website
http://www.plantzafrica.com
Publisher
 
Year
0
ISBN
 
Description
An excellent site giving detailed descriptions and uses of many S. African plants.
].
The wood contains an oil that makes it very inflammable - as well as being used as a fuel, it is employed as a tinder and is used to produce fire by friction[
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.
,
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.
]. The wood is reported to 'burn like paraffin'- giving a bright, hot fire[
295
Title
PlantZAfrica.com
Publication
 
Author
 
Website
http://www.plantzafrica.com
Publisher
 
Year
0
ISBN
 
Description
An excellent site giving detailed descriptions and uses of many S. African plants.
].

Propagation

Seed - pre-treatment before sowing is not necessary. The seed can be sown in an equal mixture of river sand and compost, and should be covered by a thin layer of sand. The germination rate of fresh seed is generally high, but seeds lose their viability rapidly, within a few months. It is recommended to transplant seedlings when they have 3 leaves[
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.
].
Root suckers can also be used for propagation[
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.
].
Cite as: Tropical Plants Database, Ken Fern. tropical.theferns.info. 2019-08-21. <tropical.theferns.info/viewtropical.php?id=Ptaeroxylon+obliquum>

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