Azobe (Lophira alata)

loading
Azobe trees
loading
Loading more images and videos...

Azobe fact file

Azobe description

KingdomPlantae
PhylumTracheophyta
ClassMagnoliopsida
OrderTheales
FamilyOchnaceae
GenusLophira (1)

The alternative name for this large rainforest tree, ‘ironwood’, refers to the very heavy and hard nature of its valuable timber (2) (3). The trunk of the azobe is usually straight, without buttresses, but sometimes with a swollen base (2) (4) (5), and is usually clear of branches up to about 30 metres (5). The bark is typically red-brown in colour, up to two centimetres thick, and has a bright yellow layer underneath. Young trees under four metres in height have greenish-grey bark, which becomes pink or light brown as the tree matures (2). Inside, the living sapwood is pale pink or whitish in colour, while the inner heartwood is dark red-brown to chocolate brown, with conspicuous white deposits of silica (2) (4) (5). The leaves of the azobe are up to 25 centimetres long and are tough, fairly narrow and elongated, with a rounded or slightly indented tip, and tend to occur in clusters at the ends of the twigs (2) (4).

Also known as
ekki, ironwood, red ironwood.
French
Azobé.
Size
Height: up to 60 m (2)
Trunk diameter: up to 1.5 m (2)
Top

Azobe biology

The azobe sheds all its leaves during a short period of one to two weeks, usually in December, and the re-growth of bright red young leaves, often simultaneously on all azobe trees in an area, can set the canopy ablaze with colour (2). The flowers of the azobe are white, fairly large, strong-smelling, and grouped in loose, branched, terminal inflorescences. Flowering occurs in adult trees with trunks over 50 centimetres in diameter, and takes place from the time the new leaves appear. Azobe is monoecious, meaning that male and female flowers are found on the same tree, and the flowers are insect-pollinated (2) (4) (6). Fruiting takes place between January and March, the fruits becoming mature around March to April, although fruits do not always appear every year (2). The fruits, which are wind-dispersed, contain a single, oil-rich seed in a conical capsule, which is brown when mature and is surrounded by two unequally-sized membranous ‘wings’, one up to six centimetres long and the other twice the size, at up to twelve centimetres (2) (4) (7). Although the azobe needs full sunlight to grow (2) (7), seedlings can persist for some time in the shady undergrowth and resume growth if and when sunlight again becomes available (2).

Top

Azobe range

Azobe occurs in western and central Africa, from Sierra Leone to Ghana, and in Nigeria, Cameroon, Congo, Democratic Republic of the Congo, Equatorial Guinea, Gabon, Sudan and Uganda (1) (6) (7).

Top

Azobe habitat

Found in wet evergreen forest, moist deciduous forest, freshwater swamp forest and gallery forest, azobe is a pioneer species, able to colonise open and disturbed areas, such as forest edges, clearings, the sides of roads and rivers, and even savannas and abandoned cultivated areas (1) (2) (7). Azobe adapts to a range of soil types and tends to prefer fairly flat ground, generally at elevations below 800 metres (2).

Top

Azobe status

Classified as Vulnerable (VU) on the IUCN Red List (1).

IUCN Red List species status – Vulnerable

Top

Azobe threats

Although common and widespread in Cameroon, where it regenerates well (1) (7), azobe is under threat in other parts of its range as a result of large-scale forest destruction and over-exploitation for its timber (1), which is popular for heavy construction work, harbour works and railway sleepers (2) (3) (7). The species is also used locally in traditional medicine, for treating backache, toothache, respiratory and stomach problems, and as a treatment for yellow fever. The leaves can be used in mulch to help control termites, and an edible and odourless oil from the seeds is used as a food and to make ointments and soaps (2) (7) (8). This heavy exploitation, together with azobe’s slow growth rate and poor regeneration when conditions are not optimum, is contributing to a population decline throughout most of its range (1).

Top

Azobe conservation

The azobe is protected by law in Ivory Coast (7), and occurs in protected areas in some parts of its range, such as in Odzala National Park in Congo (9). However, improved protection, better management of existing forest reserves, and intensified regeneration work are all considered essential conservation measures to protect this heavily utilised rainforest tree (1) (7).

Top

Find out more

For more information on the conservation of threatened tree species and for advice on responsible timber buying, see:

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

Buttress
The flared base of certain tree trunks.
Deciduous
A plant that sheds its leaves at the end of the growing season.
Gallery forest
Forest growing along a river or stream.
Heartwood
The inner layers of wood in a tree that no longer contain living cells or produce sap. Heartwood tends to be darker in colour than the outer ‘sapwood’.
Inflorescence
The reproductive shoot of a plant which bears a group or cluster of flowers.
Pollinate
To transfer pollen grains from the stamen (male part of a flower) to the stigma (female part of a flower) of a flowering plant. This usually leads to fertilisation, the development of seeds and, eventually, a new plant.
Sapwood
The living, soft wood between the bark of a tree and its inner, non-living heartwood. This outer layer of wood contains the sap and is generally lighter in colour than the heartwood.
Top

References

  1. IUCN Red List (January, 2009)
    http://www.iucnredlist.org/
  2. Palla, F., Louppe, D. and Doumenge, C. (2002) Azobé. Forafri, Libreville, Gabon and Cirad-forêt, Montpellier, France. Available at:
    http://www.forafri.org/ressources/forafri/33.pdf
  3. Méniaud, J. (1950) L’azobé et ses utilisations. Bois et Forêts des Tropiques, 15: 261 - 266.
  4. Wageningen University Forest Ecology and Forest Management Group: Tree factsheet - Lophira alata (January, 2009)
    http://webdocs.dow.wur.nl/internet/fem/uk/trees/lopalaf.pdf
  5. Chudnoff, M. (1984) Tropical Timbers of the World. Agriculture Handbook No. 607. USDA Forest Service, Madison, WI. Available at:
    http://128.104.77.230/TechSheets/tropicalwood.html
  6. Aluka (January, 2009)
    http://www.aluka.org/action/showMetadata?doi=10.5555/AL.AP.FLORA.FWTA1240&pgs
  7. UNEP-WCMC. (1999) Contribution to an Evaluation of Tree Species using the New CITES Listing Criteria. UNEP-World Conservation Monitoring Centre, Cambridge. Available at:
    http://www.unep-wcmc.org/species/tree_study/
  8. Laird, S.A. (1999) The management of forests for timber and non-wood forest products in Central Africa. In: Sunderland, T.C.H., Clark, L.E. and Vantomme, P. (Eds) Non-Wood Forest Products of Central Africa: Current Research Issues and Prospects for Conservation and Development. Food and Agriculture Organisation, Rome.
  9. Dowsett-Lemaire, F. (1996) Composition et évolution de la végétation forestière au Parc National d’Odzala, Congo. Bulletin du Jardin Botanique National de Belgique, 65: 253 - 292.
X
Close

Image credit

Azobe trees  
Azobe trees

© Christophe Ratier / www.photoshot.com

NHPA/Photoshot Holdings Ltd
29-31 Saffron Hill
London
EC1N 8SW
United Kingdom
Tel: +44 (0) 20 7421 6003
Fax: +44 (0) 20 7421 6006
sales@photoshot.com
http://www.photoshot.com

X
Close

Link to this photo

ARKive species - Azobe (Lophira alata) 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 »

This species is featured in:

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

Blog