Drosera madagascariensis
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Flowering Drosera madagascariensis |
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| Drosera madagascariensis | ||||||||||||
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Drosera madagascariensis is a carnivorous plant from the genus of the sundew ( Drosera ). It wasfirst describedby Augustin Pyramus de Candolle in 1824.
description
In Drosera madagascariensis is a columnar-building, vigorous style with a clearly visible stem axis , which stands as a younger plant upright and aged either tilts and continues to grow on the ground or anchored with their leaves in surrounding plants.
leaves
The plant reaches a height of 25 cm and is surrounded in the lower part of the stem axis by old, dead leaves that hang down. The leaves grow alternately on the stem. The petiole is 1.5 to 3 cm long and carries a 10 to 15 mm long and 7 mm wide inverted-egg-shaped to spatulate-shaped leaf blade. The root system is poorly developed.
Flowers and fruit
The one or two slightly hairy flower stalks of the plant are 20 to 40 cm high and carry 4 to 12, rarely up to 15 flowers on a two to five millimeter long flower stalk in a wrap . The sepals are broadly linear to ovate and slightly hairy, the pink petals are inverted ovoid, six to twelve millimeters long and four to six millimeters wide. The capsule fruit is broadly linear, the seeds are spindle-shaped and up to 0.6 millimeters long.
Chromosome number
The number of chromosomes is 2n = 40.
distribution
Drosera madagascariensis is native to tropical Africa (Guinea, Nigeria, Cameroon, Congo, Angola, Zambezi, Tanganyika) to South Africa and the east of the island of Madagascar , where it can be found in swamps, on streams and in peat moss bogs .
Use and hazard
Drosera madagascariensis is used as a substitute for the round-leaved sundew , which is protected in many places and used as a medicinal plant. Plants from farms are used, but areas in Madagascar are also harvested. There between ten and two hundred million plants are collected for marketing purposes annually through this exploitation applies Drosera madagascariensis in Madagascar as endangered ,.
literature
- Ludwig Diels : Droseraceae (= The Plant Kingdom . 26 = 4, 112, ZDB -ID 846151-x ). Engelmann, Leipzig 1906, p. 109.
- Anna Amelia Obermeyer: Droseraceae. In: The Flora of Southern Africa. Volume 13: Cruciferae, Capparaceae, Resedaceae, Moringaceae, Droseraceae, Roridulaceae, Podosfemaceae, Hydrostachyaceae. Botanical Research Institute - Department of Agricultural Technical Services - Republic of South Africa, Pretoria 1970, pp. 187-201.
Individual evidence
- ^ Drosera madagascariensis at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
Web links
- Complete data sheet at www.fleischfressendepflanzen.de
- Drosera madagascariensis . In: S. Dressler, M. Schmidt, G. Zizka (Eds.): African plants - A Photo Guide. Senckenberg, Frankfurt / Main 2014.