Khaya
Khaya ( "African mahogany ", English: "African Mahogany", French: " cashew ") is a genus of flowering plants in the family of the mahogany family ( Meliaceae ). The six species occur in tropical Africa south of the Sahara from Senegal to Uganda, Tanzania and Angola to the south, as well as in Madagascar and the Comoros before.
- 4.1 Notes and references
Description
Appearance and leaves
Khaya species grow as trees. The alternate and spirally arranged on the branches leaves are stalked. The leaf blades are pinnate. The bare leaflets have a smooth edge.
Inflorescences and flowers
In lateral or nearly terminal, thyrsigen inflorescences many flowers are borne. Khaya species are monoecious getrenntgeschlechtig ( monoecious ). The flowers look like hermaphrodite but functionally unisexual.
The flowers are radial symmetry and four or fünfzählig double perianth. The four or five sepals are fused only at their base. The four or five petals are free and rotated. The eight or ten stamens are fused to one another jug, kettle or cups. The discus is cushion -shaped. Four or five carpels are fused to a constant upper, four - or fünfkammerigen ovary. Each ovary chamber usually contains 12 to 16 (rarely up to 18 ) Amphitrope ovules. The scar is disc-shaped with four or five grooves on the upper end.
Fruit and seeds
The more or less spherical seed capsules are woody at maturity and open with four or five doors. The all around membranous winged seeds contain sparse endosperm and an embryo with two flat cotyledons ( cotyledons ) and lateral Radicula.
Use
The wood ( trade names other Khaya Mahogany, Grand Bassam, N'Dola, N'Gollon, Undianunu, Zaminguila ) has a density of 720-750 kg/m3. It is used among other things for countertops, veneers, hardwood floors, musical instruments, and boat-building.
System
The genus Khaya was set up by Adrien Henri Laurent de Jussieu in 1830 in Mémoires du Muséum d' Histoire Naturelle, 19, p 249, Plate 10. Type species is Khaya senegalensis ( Desr. ) A.Juss .. A synonym for Khaya A.Juss. is Garretia Welw ..
The genus Khaya contains about six species (here with their distribution ):
- Khaya anthotheca ( Welw. ) C.DC. ( Syn: Garretia anthotheca Welw, Khaya nyasica Stapf ex Baker f. ): The distribution of liet in southern Africa.
- Khaya grandifoliola C.DC.: it is the most popular choice as far as Cameroon, Congo, Angola and Uganda.
- Khaya ivorensis A.Chev. It occurs in Ghana and the Ivory Coast.
- Khaya madagascariensis Jum. & H.Perrier: It occurs in Madagascar and the Comoros. It is in the Red List of endangered species in the IUCN as "endangered " = classified as " critically endangered ".
- Khaya senegalensis ( Desr. ) A.Juss. ( Syn: Swietenia senegalensis Desr. ): The wide distribution area lies in tropical Africa.
Khaya belongs to the family Meliaceae, or Mahogany Family, which also includes the genus Swietenia ( types of it are "American Mahogany ") and Entandrophragma ( species of this genus are named " Sipo ", " Sapele ", " Kosipo " and " Tiama " ). include
Swell
- Hua Peng & David J. Mabberley: Khaya in the Flora of China, Volume 11, 2008, p 116 online. ( Description section )