Entandrophragma
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Sapele tree ( Entandrophragma cylindricum ) in the Congo , habitus |
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Entandrophragma is a genus of plants within the mahogany family (Meliaceae). The ten or eleven species are common in tropical Africa. Some species are important as suppliers of high quality wood .
description
Entandrophragma species are trees that usually reach great heights (individual specimens can reach more than 80 meters) and grow in the emergent layer. The leaves are pinnate in pairs, the leaflets are not further subdivided.
Entandrophragma species are dioeciously segregated ( diocesan ). The flowers are arranged in paniculate inflorescences . The unisexual flowers are five-fold. The five sepals are fused together at the base. The five petals look out of the calyx from the bud. The ten stamens have grown together to form a tube. The ovary is five-chambered, it develops into a woody capsule fruit . The central axis of the capsule fruit ( Columella ) is pentagonal in cross section. The seeds are winged on one side, with the wing in the capsule pointing towards the fruit stalk.
species
The genus Entandrophragma contains ten or eleven species, including:
- Entandrophragma angolense (Welw.) C.DC.
- Entandrophragma candollei Harms : It occurs from tropical West Africa to Central Africa.
- Entandrophragma caudatum (Sprague) Sprague : It occurs in southern Africa.
- Sapele ( Entandrophragma cylindricum ) (Sprague) Sprague
- Entandrophragma delevoyi De Wild. : It occurs in Tanzania, Zambia and Zaire.
- Entandrophragma excelsum (Dawe & Sprague) Sprague : It occurs in Zaire, Malawi, Tanzania and Uganda.
- Entandrophragma stolzii Harms : It was described from Tanzania.
- Entandrophragma utile (Dawe & Sprague) Sprague : It occurs in tropical West Africa, in Cameroon, Gabon, Zaire, Angola and Uganda.
use
The woods of the genus Entandrophragma are considered precious woods . They are mainly used as high-quality veneer and as construction wood in frame construction for windows, but are also used in instrument construction .
Web links
Drawing from Engler's “Plant World of Africa” .
Individual evidence
- ↑ Leaflet Kosipo ( Memento of the original from November 17, 2016 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. (PDF; 1.25 MB), from sda22649b13e21108.jimcontent.com, accessed on November 17, 2016.
- ↑ a b Entandrophragma excelsum on uni-bayreuth.de, accessed on December 6, 2016.
- ↑ a b c d e Entandrophragma in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved June 13, 2017.
supporting documents
- Mark A. Hyde, Bart Wursten: Genus page: Entandrophragma. In: Flora of Zimbabwe. Retrieved October 16, 2009 .
- F. White, BT Styles: Entandrophragm . In: Flora Zambesiaca . tape 2 , 1963 ( Flora Zambesiaca ).
- Entandrophragma in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved November 5, 2009.