Cylicodiscus gabunensis
| Cylicodiscus gabunensis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name of the genus | ||||||||||||
| Cylicodiscus | ||||||||||||
| Harms | ||||||||||||
| Scientific name of the species | ||||||||||||
| Cylicodiscus gabunensis | ||||||||||||
| Harms |
Cylicodiscus gabunensis is a tree in the legume family from the subfamily of the mimosa family. It occurs from central to western Africa , from the Congo to the Ivory Coast . It is the only species in the genus Cylicodiscus .
description
Cylicodiscus gabunensis grows as a very large, semi- evergreen tree up to 60 meters high. The trunk diameter reaches 1.5–3 meters. There are buttresses trained and only sometimes smaller buttress roots or are ribbing present. The brownish to greyish bark is coarse, scaly and flakes off with small plates. The trunk of young specimens is reinforced with short thorns .
The alternate, short-stalked leaves are bipinnate with 2–4 leaflets, each with 5–10 short-stalked, mostly alternate and glabrous leaflets . The petiole with a gland at the tip is up to 2 centimeters long, the short leaflet stalks 2–3 millimeters. The egg-shaped to elliptical leaflets are 5–10 centimeters long, up to 5 centimeters wide, with entire margins and pointed to pointed. The young leaves are reddish. The stipules are usually missing.
There are terminal or axillary, hairy and Multiflora spike-like, traubig- panicles inflorescences formed. The hermaphrodite, almost sessile and very small flowers are five-fold with a double flower cover . The small, slightly reddish, slightly hairy outside, cup-shaped, 1.5 millimeter long calyx is minimally serrated. The free, flabby petals are whitish to yellowish and up to 3 millimeters long. There are 10 free, protruding stamens . The pedicle elongated ovary is medium constantly with a slender pen . There is a discus .
Up to 60–90 centimeters long and 4.5–5 centimeters wide, many-seeded and unilaterally opening, red-brown, somewhat scaly, leathery legumes are formed. The winged, flat and elongated seeds are up to 7.5 centimeters long with the short wing all around.
Taxonomy
The first description of the genus Cylicodiscus and the species Cylicodiscus gabunensis was made in 1897 by Hermann August Theodor Harms in HGAEngler & KAEPrantl, Nat. Plant family, Nachtr. 1: 192.
use
The hard, heavy and very resistant wood is sought, it is known as Okan or greenheart African , African green heart wood . It is used as a substitute for green heart wood.
literature
- Quentin Meunier, Carl Moumbogou, Jean-Louis Doucet: Les arbres utiles du Gabon. Presses Agronomiques de Gembloux, 2015, ISBN 978-2-87016-134-0 , p. 196 f, limited preview in the Google book search.
- J. Gérard, D. Guibal, S. Paradis, J.-C. Cerre: Tropical Timber Atlas. Éditions Quæ, 2017, ISBN 978-2-7592-2798-3 , pp. 681 ff, limited preview in Google Book Search.
- Martin Chudnoff: Tropical Timbers of the World. Agriculture Handbook 607, USDA Forest Service, 1984, p. 208, limited preview in Google book search.
- RN Makemba, F. Tosso, Ch. Moupela et al .: Cylicodiscus gabunensis Harms: une espèce prisée dans le commerce international (synthèse bibliographique). In: Biotechnology, Agronomy and Society and Environment. 23 (3), 2019, pp. 188-202, online at researchgate.net.
Web links
- Cylicodiscus gabunensis at Useful Tropical Plants.
- Cylicodiscus gabunensis at PROTA.
- Okan at Pallisco-CIFM (French, PDF).