Baikiaea plurijuga
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Baikiaea plurijuga |
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| Harms |
Baikiaea plurijuga is a tree in the legume family in the carob subfamily from southwestern Africa. It occurs in Angola , Botswana , in the Caprivi Strip , in Namibia to South Africa and in Zambia to Zimbabwe .
description
Baikiaea plurijuga grows as a semi-evergreen , slow-growing, often multi-stemmed tree with a thick, spreading crown, up to 17-25 meters high. The trunk diameter reaches 100-120 centimeters. Deep tap roots are formed. Sometimes roots are formed. The bark is brown to gray and cracks and flakes with age. The tree leads a rubber .
The stalked leaves are alternate, helically arranged and pinnate in pairs with 8–12 leaflets . They are 1.5–2.5 cm long petiole to 11–13 cm long. The entire, egg-shaped to obovate or elliptical, almost bald leaflets are rounded to round-pointed and often finely tipped, sometimes indented and with short stalk. They are about 4–8 inches long and rounded to slightly heart-shaped at the base. The leaf margins are partly finely bent. The rachis, the leaf and the short leaflet stalks are somewhat rusty hairy. The smaller stipules are sloping.
Terminal or axillary, brownish hairy, long and upright grapes are formed. The hermaphrodite, fragrant and stalked flowers have a double flower envelope . The flowers have sloping bracts and bracts . The 1–1.5 centimeter long flower stalk is divided with a "joint". There are 4 uneven and brownish, velvety hairy, 1.5–2 cm long sepals, and 5, about 2.5–3.5 cm long, light purple to violet, somewhat wrinkled, spatula to obovate petals. The petals are sometimes hairy inside on the midrib. Of the 10 stamens , 9 are fused at the base and one is free, the stamens are hairy at the base. The stalked, unicameral ovary is brownish, hairy and medium-sized, with a long stylus .
Woody, flat and brown, velvety hairy, about 8-14 centimeters long, 3.5-5 centimeters wide, multi-seeded, approximately obovate legumes are formed. The flat, dark brown and hard, smooth, somewhat shiny seeds are round to elliptical and 2–2.5 centimeters in size. The fruits open explosively, ballochor and eject the seeds.
The number of chromosomes is 2n = 24.
Taxonomy
The first description was in 1903 by Hermann August Theodor Harms in O.Warburg (ed.), Kunene-Sambesi Exped .: 248.
use
The hard, quite heavy and durable, beautiful but difficult to treat wood is known as Zambez (s) i or Rhodesian teak , redwood .
The tannic bark , gum and sap are used medicinally.
Jewelry is made from the seeds.
literature
- The CABI Encyclopedia of Forest Trees. CABI, 2013, ISBN 978-1-78064-236-9 , p. 80 f.
- M. Chudnoff: Tropical Timbers of the World. Agriculture Handbook 607, USDA, 184, p. 188, limited preview in Google Book search.
Web links
- Baikiaea plurijuga at PROTA.
- D. Jøker, J. Jepsen: Baikiaea plurijuga. In: Seed Leaflet. No. 84, 2003, online (PDF).
- Baikiaea plurijuga at Photo Guide to Plants of Southern Africa (pictures)
- Baikiaea plurijuga . In: S. Dressler, M. Schmidt, G. Zizka (Eds.): African plants - A Photo Guide. Senckenberg, Frankfurt / Main 2014.
- Rhodesian teak on wood-database.com.
Individual evidence
- ↑ Baikiaea plurijuga at KEW Science (Descriptions).
- ↑ online at biodiversitylibrary.org.