dcsimg
Image of Sneezewood
Creatures » » Plants » » Rue Family »

Sneezewood

Ptaeroxylon obliquum (Thunb.) Radlk.

Derivation of specific name

provided by Flora of Zimbabwe
obliquum: oblique, asymmetric, referring to the leaflets.
license
cc-by-nc
copyright
Mark Hyde, Bart Wursten and Petra Ballings
bibliographic citation
Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Ptaeroxylon obliquum (Thunb.) Radlk. Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=137540
author
Mark Hyde
author
Bart Wursten
author
Petra Ballings
original
visit source
partner site
Flora of Zimbabwe

Description

provided by Flora of Zimbabwe
Shrub or small to medium-sized deciduous tree. Bark whitish-grey, smooth when young, fissured in older specimens. Leaves opposite, crowded near the ends of branches, paripinnate with 3-7 pairs of leaflets, aromatic when crushed. Leaflets usually c. 2.5 × 1.3 cm, markedly asymmetric, blue-green to dark green, hairless; translucent gland-dots present; apex rounded or notched; margin entire. Flowers in axillary branched heads, white to creamy-yellow, unisexual on different trees, sweetly scented. Fruit a 2-winged capsule, notched at the base and apex, c. 2 × 1.5 cm, yellowish to reddish-brown with conspicuous veins, dehiscent into 2 valves, which remain on the tree for some time.
license
cc-by-nc
copyright
Mark Hyde, Bart Wursten and Petra Ballings
bibliographic citation
Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Ptaeroxylon obliquum (Thunb.) Radlk. Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=137540
author
Mark Hyde
author
Bart Wursten
author
Petra Ballings
original
visit source
partner site
Flora of Zimbabwe

Insects whose larvae eat this plant species

provided by Flora of Zimbabwe
Papilio demodocus demodocus (Citrus swallowtail)
license
cc-by-nc
copyright
Mark Hyde, Bart Wursten and Petra Ballings
bibliographic citation
Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Ptaeroxylon obliquum (Thunb.) Radlk. Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=137540
author
Mark Hyde
author
Bart Wursten
author
Petra Ballings
original
visit source
partner site
Flora of Zimbabwe

Worldwide distribution

provided by Flora of Zimbabwe
Angola, Botswana, Namibia, Tanzania, Mozambique, Zambia, Zimbabwe, Swaziland and South Africa as far as the Eastern Cape.
license
cc-by-nc
copyright
Mark Hyde, Bart Wursten and Petra Ballings
bibliographic citation
Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Ptaeroxylon obliquum (Thunb.) Radlk. Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=137540
author
Mark Hyde
author
Bart Wursten
author
Petra Ballings
original
visit source
partner site
Flora of Zimbabwe

Ptaeroxylon

provided by wikipedia EN

Ptaeroxylon obliquum is the botanical name for the sneezewood tree. It is native to Southern Africa, including South Africa, Zimbabwe, and Mozambique. It is the only species in the genus Ptaeroxylon.

Background

Ptaeroxylon obliquum is a species from the family Rutaceae which are most abundant in South Africa and Australia.[1] The term ptaeroxylon is Greek for sneeze and wood,[2] while obliquum denotes the oblique shape of the leaflets. The wood produces oils containing nieshoutol, which causes violent sneeze attacks by workers who are exposed to the tree.[2] Though sneezewood is not poisonous, it has been known to cause respiratory complications. It has been linked to asthma, rhinitis and mucosal inflammation.[3]

Description

"
foliage
"
male flowers

Ptaeroxylon obliquum is a shrub or medium deciduous tree that stands up to 15 metres (49 ft) tall.[4] The bark is whitish-grey and smooth when young, but fissured with age. Leaflets are 2.5 x 1.3 cm marked asymmetrically. They are blue-green to dark green in color and crowd near the ends of the rachis in three to seven pairs of leaflets. The flowers on the tree are white to creamy yellow and fragrant.[5]

Sneezewood is very dense having a specific gravity of 1040 kg/m3

Uses

Lumber

Sneezewood is an extremely hard and durable timber wood. It often lasts longer than brass or iron when used for machine bearings.[4]

In the past, sneezewood was used extensively for railway sleepers. It can also be used to make furniture. In Mozambique it is used to make xylophone keys.[2]

Sneezewood is a very attractive wood with golden heartwood with light orange figures and is a favorite amongst woodturners.

Its scarcity today is due in part of its past use as fuel for steam tugs.[2] It has been used extensively for fence and telegraph poles as well.[4]

Medicinal

Sneezewood is used for medicinal and ritual purposes. The bark can be used to repel moths or as snuff. The resin has been used to get rid of warts and cattle ticks.[2]

The Xhosa have traditionally made snuff from sneeze-wood to relieve headaches.[6]

See also

References

  1. ^ "Rue." Columbia Electronic Encyclopedia, 6th Edition (2009): 1. Academic Search Complete. EBSCO. Web. 3 Mar. 2010.
  2. ^ a b c d e Archer, Robert; Reynolds, Yvonne (2001). "Ptaeroxylon obliquum". Plantz Afrika. Retrieved 3 March 2010.
  3. ^ Anderson M.D., Mark. "Toxic Woods and Occupational Lung Diseases." Fine Art Photography. Riparia, 1 May 2000. Web. 11 Mar. 2010.
  4. ^ a b c Roux, Dr. J.P. "Ptaeroxylon Obliquum." Aluka, 2003. Web. 03 Ma[...] 2010.
  5. ^ "Ptaeroxylon Oblique", Flora of Zimbabwe. Zimbabwe flora, 14 Feb. 2009. Web. 11 Mar 2010.
  6. ^ Peter Schirmer, The Concise Illustrated South African Encyclopedia 1980, Central News Agency Ltd, ISBN 0-620-04359-8
"
license
cc-by-sa-3.0
copyright
Wikipedia authors and editors
original
visit source
partner site
wikipedia EN

Ptaeroxylon: Brief Summary

provided by wikipedia EN

Ptaeroxylon obliquum is the botanical name for the sneezewood tree. It is native to Southern Africa, including South Africa, Zimbabwe, and Mozambique. It is the only species in the genus Ptaeroxylon.

license
cc-by-sa-3.0
copyright
Wikipedia authors and editors
original
visit source
partner site
wikipedia EN