Bleedwood tree (Pterocarpus angolensis)

loading
Bleedwood tree
loading
Loading more images and videos...

Bleedwood tree fact file

Bleedwood tree description

KingdomPlantae
PhylumTracheophyta
ClassMagnoliopsida
OrderFabales
FamilyLeguminosae
GenusPterocarpus (1)

The tropical, deciduous bleedwood tree (Pterocarpus angolensis) is particularly beautiful when the small, sweetly-scented, orange-yellow flowers bloom in spring, and in autumn when the long, drooping leaves assume a dark yellow colour (3) (4). The bleedwood tree has a wide, flattened crown consisting of large leaves, 30 to 40 centimetres long and divided in a feathery manner. The trunk has handsome heartwood, varying in colour from light brown to red or coppery-brown (4), and bark that is dark, rough and cracked (3). The bleedwood tree’s seed pods are almost circular, with a hard centre covered in brown bristles, surrounded by a thin, creamy-brown wing (3). The pods can be up to ten centimetres in diameter and are borne in hanging clusters (4). The dark red, sticky sap from which the tree gets its name is used as a dye and has medicinal properties (3).

Also known as
kiaat, mukwa, Transvaal teak.
Size
Height: 5 - 20 m (2)
Trunk diameter: 0.6 m (3)
Top

Bleedwood tree biology

For around two weeks in spring, the bleedwood tree bears abundant pretty, little flowers, at the same time as the new leaf buds begin to shoot (3) (6). By winter, the long drooping leaves have gone and the bleedwood tree is adorned with hundreds of its distinctive pods (3) (7). The paper-like wing of the pod enables it, and the one or two seeds within, to be carried on the wind away from the parent tree (4) (7). The hard, spiny centre of the pod does not split open on its own and thus requires physical abrasion or other mechanisms for it to open and allow the seeds to germinate (7). Exposure to moderate levels of fire has also been shown to assist in the breaking down of the woody pod, and therefore facilitate germination (8). Bleedwood trees are reproductively mature and produce pods (fruit) at 15 to 20 years of age (5), and continue to produce fruit until they die (6).

Top

Bleedwood tree range

The bleedwood tree occurs in woodland areas of east and southern Africa, in Angola, Botswana, the Democratic Republic of Congo, Mozambique, Namibia, South Africa, Swaziland, Tanzania, Zambia and Zimbabwe (5)

Top

Bleedwood tree habitat

The bleedwood tree occurs in dry, deciduous woodland and open bushveld, from 300 to 1,550 metres above sea level (2). It generally grows on well-drained terrain (4), most often in deep sandy soil (3).

Top

Bleedwood tree status

The bleedwood tree is classified as Near Threatened (NT) on the IUCN Red List (1).

IUCN Red List species status – Near Threatened

Top

Bleedwood tree threats

In some areas, bleedwood trees are becoming less common as they are heavily exploited by local people and for export (5). The handsome heartwood is one of the best timbers in southern Africa (3), one of the most favoured furniture woods, and is used extensively by artists producing sculptures of wild animals for the curio trade (4). In many parts of its range there is no control over the rate of harvesting (5). In addition, clearing of land for agriculture and housing, expanding human populations, and heavy browsing of small bleedwood trees, all play a part in this species’ continuing decline (2). Populations may also be impacted by the death of large bleedwood trees from a fungal disease (5) (9).

Top

Bleedwood tree conservation

Despite the threats this species faces, large stands of the bleedwood tree still occur, particularly in protected areas in South Africa, Botswana and Namibia, and there are attempts to use these remaining stands in a sustainable way (5).

Top

Authentication

This information is awaiting authentication by a species expert, and will be updated as soon as possible. If you are able to help please contact:
arkive@wildscreen.org.uk

Top

Glossary

Bushveld
A habitat consisting ofextensive grasslands with scattered trees and bushes, found in the east of the interior of South Africa.
Deciduous
A plant that sheds its leaves at the end of the growing season.
Deciduous forest
Forest consisting mainly of deciduous trees, which shed their leaves at the end of the growing season.
Germination
The beginning of growth, usually following a period of dormancy and in response to favourable conditions. For example, the sprouting of a seedling from a seed.
Top

References

  1. IUCN Red List (March, 2011)
    http://www.iucnredlist.org/
  2. Loots, S. (2005) Red Data Book of Namibian Plants. SABONET, Pretoria and Windhoek.
  3. Palmer, E. (1977) A Field Guide to the Trees of Southern Africa. William Collins Sons and Co Ltd, Glasgow.
  4. Van Wyk, P. (1993) Southern African Trees: A Photographic Guide. New Holland Ltd, London.
  5. Oldfield, S., Lusty, C. and MacKinven, A. (1998) The World List of Threatened Trees. World Conservation Press, Cambridge, UK.
  6. World Agroforestry Centre: Agroforestree Database (December, 2007)
    http://www.worldagroforestrycentre.org/Sites/TreeDBS/aft.asp
  7. Boaler, S.B. (1966) The Ecology of Pterocarpus angolensis D.C. in Tanzania. Overseas Research and Publication No. 12, Ministry of Overseas Development, London.
  8. Banda, T., Schwartz, M.W. and Caro, T. (2006) Effects of fire on germination of Pterocarpus angolensis. Forest Ecology and Management, 233(1): 116 - 120.
  9. Tree Conservation Information Service (December, 2007)
    http://www.unep-wcmc.org/trees/trade/pte_ang.htm
X
Close

Image credit

Bleedwood tree  
Bleedwood tree

© Tony Heald / naturepl.com

Nature Picture Library
5a Great George Street
Bristol
BS1 5RR
United Kingdom
Tel: +44 (0) 117 911 4675
Fax: +44 (0) 117 911 4699
info@naturepl.com
http://www.naturepl.com

X
Close

Link to this photo

ARKive species - Bleedwood tree (Pterocarpus angolensis) Embed this ARKive thumbnail link ("portlet") by copying and pasting the code below.

Terms of Use - The displayed portlet may be used as a link from your website to ARKive's online content for private, scientific, conservation or educational purposes only. It may NOT be used within Apps.

Read more about

X
Close

MyARKive

MyARKive offers the scrapbook feature to signed-up members, allowing you to organize your favourite ARKive images and videos and share them with friends.

Play the Team WILD game:

Team WILD, an elite squadron of science superheroes, needs your help! Your mission: protect and conserve the planet’s species and habitats from destruction.

Conservation in Action

Which species are on the road to recovery? Find out now »

Help us share the wonders of the natural world. Donate today!

Blog