Poga oleosa
| Poga oleosa | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name of the genus | ||||||||||||
| Poga | ||||||||||||
| Pierre | ||||||||||||
| Scientific name of the species | ||||||||||||
| Poga oleosa | ||||||||||||
| Pierre |
Poga oleosa is a tree in the Anisophylleaceae family from Central Africa , Gabon , Cameroon, and Nigeria . It is the only species in the genus Poga .
description
Poga oleosa grows as an evergreen tree to over 40 meters high. The trunk diameter reaches over 90-100 centimeters. Broad buttress roots are often formed. The grayish to brown-gray bark is relatively smooth to slightly rough or somewhat scaly.
Dimorphic leaves are formed, small ones at the base of the large ones , the stipules missing. The "large", simple, alternate, leathery and bare leaves have entire margins and short stalk. The short, plump and bald petiole is 1–2 inches long. The stiff leaves are ovate, lanceolate to elliptical or elongated. They are 7-15 inches long and 5-7 inches wide. At the top they are rounded to rounded, less often pointed or indented. The leaf margin is slightly rolled up. The glossy, dark green leaves on the top are glandular and light green on the underside. The "small", seated and bare, egg-shaped leaves fall off early. The veins are pinnate and raised on the underside.
Poga oleosa is monoecious . Multi-flowered and short-haired panicles with spiked side branches are formed. The functionally unisexual and four-fold, very small, whitish, heteromorphic flowers with a double flower cover are sessile. The male flowers are only about half the size of the female. The triangular sepals are short fused and up to (1) -1.5 millimeters long, the petals are up to (1.5) -3 millimeters long with the glandular, 4-8 fringed appendages at the tips. In the male flowers there are 8 very short, almost sessile and free stamens in two circles, in the female 8 staminodes. The four-chambered ovary of the female flowers is underneath with four very short pistils with minimal scars, in the male flowers there is a pestle. There is one discus each.
Roundish to ellipsoidal, greenish, brownish-blackish and multi-seeded, partly “frosted”, 4-7 centimeters large drupes are formed. They contain a large, porous and sculpted, bumpy, 2-4-seeded, very hard stone core. The seeds are 2–2.5 centimeters in size.
use
The sweet fruits are edible. The seeds can be eaten raw or roasted. An edible oil (poga, inoy oil) is also obtained from the seeds. The oil is also used for massaging or as a laxative. The press cake is used as fodder.
The tannic rind is used medicinally or to color it black.
The relatively light, moderately resistant and easily treatable wood is known as Ovoga or Afo . It is used for various applications, especially for canoes.
literature
- K. Kubitzki : The Families and Genera of Vascular Plants. Vol. X: Flowering Plants Eudicots. Springer, 2011, ISBN 978-3-642-14396-0 , pp. 51-54.
- Quentin Meunier, Carl Moumbogou, Jean-Louis Doucet: Les arbres utiles du Gabon. Presses Agronomiques de Gembloux, 2015, ISBN 978-2-87016-134-0 , p. 80 f, limited preview in the Google book search.
- X. Chen, Li-Bing Zhang: A monograph of the Anisophylleaceae (Cucurbitales) with description of 18 new species of Anisophyllea. In: Phytotaxa. 229 (1), 2015, pp. 1–189, online (PDF; 71 MB) at researchgate.net.
- J. Gérard, D. Guibal, S. Paradis, J.-C. Cerre: Tropical Timber Atlas. Éditions Quæ, 2017, ISBN 978-2-7592-2798-3 , pp. 711 ff, limited preview in the Google book search.
- M. Chudnoff: Tropical Timber of the World. Agriculture Handbook 607, USDA Forest Service, 1984, p. 264, limited preview in Google Book Search.
Web links
- Poga oleosa at PROTA.
- Poga oleosa at Useful Tropical Plants.
- Poga oleosa at Vascular Plants of Korup National Park.