Desbordesia glaucescens
| Desbordesia glaucescens | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name of the genus | ||||||||||||
| Desbordesia | ||||||||||||
| Pierre ex Tiegh. | ||||||||||||
| Scientific name of the species | ||||||||||||
| Desbordesia glaucescens | ||||||||||||
| ( Engl. ) Tiegh. |
Desbordesia glaucescens is a tree in the Irvingiaceae family from central Africa to Nigeria . It is the only species in the genus Desbordesia .
description
Desbordesia glaucescens grows as an evergreen tree to over 50 meters high. The trunk diameter reaches up to 1.5 meters. Sometimes very large buttress roots are formed. The bark is brownish to brownish-gray and relatively smooth.
The simple, short-stalked, bare leaves are alternate. The flattened, short petiole is up to 8-10 millimeters long. The entire, ovate, lanceolate to elliptical or obovate, lanceolate leaves are 10–12 centimeters long and 4–5 centimeters wide. At the top they are rounded to pointed, pointed. The young leaves are red. The small stipules are sloping.
Short, axillary panicles are formed at the branch ends, with short-stalked, small groups of flowers on the side branches. The short-stalked, very small and five petals are white-yellowish and double perianth . The small, 1 millimeter long calyx is short cup-shaped with longer tips. The 2.5 millimeter long petals are elongated and upright. There are 10 short stamens . The ovary is upper constant bent with a sideways short pen . There is a papillary disc .
Very flat, about 12-14 centimeters long and 3.5-4 centimeters wide, one to two-seeded, eilanzettliche, first red and when ripe brown wingnuts (Samara) with a central rib and lateral, veined wings are formed. The central, elongated seeds are flat and 3.5 inches long and 1 inch wide. If they fall on the ground, they are easily mistaken for leaves.
Taxonomy
The first description of Basionyms Irvingia glaucescens was made in 1902 by Adolf Engler in Bot. Jahrb. Syst. 32: 124. The division into the new genus Desbordesia after Jean Baptiste Louis Pierre to Desbordesia glaucescens took place in 1905 by Philippe Édouard Léon Van Tieghem in Ann. Sci. Nat., Bot., Sér. 9, 1: 289, 290. Further synonyms are Desbordesia insignis Pierre ex Tiegh. , Desbordesia pallida Tiegh. , Desbordesia pierreana Tiegh. , Desbordesia soyauxii Tiegh. , Desbordesia spirei Tiegh. , Irvingella spirei Tiegh. and Irvingia oblonga A. Chev.
use
The seeds are edible and are used like those of Irvingia gabonensis . The bark is used medicinally.
The heavy, hard and durable, but difficult to treat wood is known as alep .
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. 206 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 , p. 78 ff, limited preview in the Google book search.
Web links
- Desbordesia glaucescens at Useful Tropical Plants.
- Desbordesia glaucescens near Flore du Gabon.