Isoberlinia doka
| Isoberlinia doka | ||||||||||||
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Isoberlinia doka - dry forest, Réserve de la Comoé-Léraba , Burkina Faso |
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| Scientific name | ||||||||||||
| Isoberlinia doka | ||||||||||||
| Craib & Stapf |
Isoberlinia Doka is a plant from the genus Isoberlinia in the subfamily of caesalpinioideae (Caesalpinioideae) within the family of the Leguminosae (Fabaceae). It is native to the savannahs and dry forests of tropical Africa .
description
Appearance, bark and leaf
Isoberlinia doka grows as a small to medium-sized tree and reaches heights of up to 25 meters. The trunk usually reaches lengths of 4 to 6 meters, up to a maximum of 12 meters; it is straight and cylindrical or twisted and reaches a diameter of 75 or more centimeters. Young trees have a smooth bark that peels off in large scales in later years. The inner bark is red. The treetop is quite narrow and open. The bark of the twigs is gray-brown and initially hairy and later balding.
The alternate leaves are arranged in a petiole and a leaf blade. The petiole is 6 to 12 inches long and the leaf spindle is 10 to 25 inches long. The leaf blade is pinnate in pairs with usually three (two to four) pairs of pinnate leaves arranged opposite one another. The leaflets are at a length of 6-25 centimeters and a width of 3 to 13 centimeters oval to elliptical and slightly asymmetric with a round base and a blunt until shortly pointed upper end. The early falling stipules are 2.5 inches long and 2 inches wide and more or less fused at their base.
Inflorescence and flower
The terminal or lateral total inflorescences are composed of 10 to 18 or 30 centimeters long paniculate partial inflorescences. The hermaphroditic flowers are almost radially symmetrical and five-fold with a double flower envelope . The five whitish petals are almost the same. The ten stamens are free. The upper single carpel is hairy.
Fruit and seeds
When ripe, the legume is brown with diagonal stripes and is 15 to 30 centimeters long and 5 to 8 centimeters wide, initially hairy, then increasingly balding, opens with two woody fruit flaps and contains around four seeds. The seeds are rounded and flat.
Phenology
Isoberlinia doka can start to flower from a size of 2 to 3 meters. The flowering time is in the dry season ; in the Ivory Coast and Nigeria , the trees bloom between January to February or March and fruiting is completed around July.
Occurrence
Isoberlinia doka thrives in savannahs and dry forests between the Sahara and the Guineo - Congolese rainforests from Guinea to Uganda .
Isoberlinia doka grows in areas with mean annual rainfall of 900 and 1500 mm at altitudes of 100 to 1200 meters. This pioneer tree usually grows in groups in pure stands or together with other types of legumes.
Individual evidence
- ↑ a b c d e f RHMJ Lemmens, D. Louppe, AA Oteng-Amoako: Timbers 2 . PROTA = Plant Resources of Tropical Africa, 2012, p. 804 ( Isoberlinia doka on pp. 414–418 in the Google book search).
- ↑ Isoberlinia doka data sheet with distribution map in the African Plant Database of the Conservatoire et Jardin botaniques de la Ville de Genève . (English)
- ^ F. White: Vegetation of Africa , 1983.
Web links
- Wanted poster at Royal Botanic Gardens, Kew .
- Isoberlinia doka . In: U. Brunken, M. Schmidt, S. Dressler, T. Janssen, A. Thiombiano, G. Zizka: West African plants - A Photo Guide. Senckenberg Research Institute, Frankfurt am Main 2008.