Zanthoxylum heitzii
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| ( Aubrév. & Pellegr. ) PGWaterman |
Zanthoxylum heitzii is a tree in the diamond family from central Africa, the Republic of Congo , Gabon, and the Democratic Republic of the Congo .
description
Zanthoxylum heitzii grows as a fast-growing, thorny tree up to 35 meters or more. The trunk diameter reaches up to 150 centimeters. The trunk of younger specimens is reinforced with up to 9 centimeters long and thick, conical, narrow-pointed thorns. Older specimens have almost no thorns. The smooth, aromatic bark is grayish to brownish-gray with greenish spots and scaly with age.
The alternate, long and short-stalked leaves are crowded at the branch ends and are pinnate with no pairs of 25–51 leaflets . The leaves are up to 1 meter long, with bald, but sometimes spiked rachis. The lanceolate to elongated, leathery and bare, more or less opposite, sitting leaflets are about 10-20 centimeters long and 2-5 centimeters wide. They are occupied by a few, tiny glands and slightly notched, sawed, pointed to pointed or tailed at the edge. The leaflet width is often unequal. The young leaves are reddish.
Zanthoxylum heitzii is dioecious, dioecious . Large, terminal or axillary and multi-flowered panicles are formed. The very small, five-fold flowers are sessile and have a double flower envelope . The tiny, almost completely fused sepals are up to 1 millimeter long. The 2 millimeter long petals are whitish at first and then brownish. The male flowers have stamens and a small pestle, the female an upper ovary and minimal staminodes.
Very small, single-seeded and only 4 millimeters large, glandular-dotted, roundish, follicle fruits that are brownish to maturity are formed. The seed, up to 2.5 millimeters in size, is blackish and shiny.
use
The light, medium-hard wood , satin wood , is known as olon (tendre) .
The bark is used medicinally.
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. 268 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. 690 ff, limited preview in the Google Book Search.
Web links
- Zanthoxylum heitzii at PROTA.
- Zanthoxylum heitzii . In: S. Dressler, M. Schmidt, G. Zizka (Eds.): African plants - A Photo Guide. Senckenberg, Frankfurt / Main 2014.