Winged Senna
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Winged Senna ( Senna didymobotrya ) |
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| Senna didymobotrya | ||||||||||||
| ( Fresen. ) HSIrwin & Barneby |
The Winged Senna ( Senna didymobotrya ) is a plant from the genus Senna within the family of the Leguminosae (Fabaceae). It is originally from Africa .
description
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Vegetative characteristics
The winged senna grows as an evergreen shrub to a small tree and usually reaches heights of 2.5 to 3, rarely up to 6 meters. The bark of young twigs is slightly downy and hairy and later bald.
The alternate leaves are arranged in a petiole and a leaf blade and are usually 35, rarely up to 50 centimeters long. The leaves are downy and hairy and later bald. The petiole and the rhachis leaf have no glands. The leaf blade is pinnate in pairs with usually 8 to 16 rarely up to 21 pairs of leaflets. The stalks of the leaflets are very short. The ± dark green leaflets are 2 to 5.5 centimeters long and 1 to 2 centimeters wide and are ovate-oblong to lanceolate-oblong with a rounded and oblique base and a blunt or slightly pointed upper end with a spike tip. The underside of the leaflets is floury-white. The late falling stipules are ovate-heart-shaped with a length of 6 to 17 millimeters with a pointed upper end.
Generative characteristics
The upright, slender, 10 to 35, rarely up to 45 centimeters long racemose inflorescences are located in the leaf axils of the upper area of the twigs or in a terminal, leafy paniculate entire inflorescence . The bracts, which fall off early, are broadly ovate with a slightly pointed or pointed upper end. The unopened flower buds are dark brown.
The hermaphrodite flowers are somewhat zygomorphic and five-fold with a double flower envelope . The five petals are oblong-obovate. The five golden yellow petals are oblong or obovate and nailed short. Of the ten stamens, two are particularly long and curved with a length of 12 millimeters. The only carpel is densely yellowish, finely haired.
The legumes are initially green and then turn dark brown; they are lightly fluffy and flat; the legume is about 10 inches long and 2 inches wide.
Chromosome number
The number of chromosomes is 2n = 28.
Occurrence
The distribution area of Senna didymobotrya extends in tropical Africa over Ethiopia , Sudan , Kenya , Tanzania , Uganda , Rwanda , Zaire , Angola , Malawi , Zambia , Zimbabwe and Madagascar . It is a neophyte in southern North America , southern Africa and Australia .
Taxonomy
The first description successes in 1839 under the name ( Basionym ) Cassia didymobotrya by Johann Baptist Georg Wolfgang Fresenius in Flora , 22, 53. The new combination to Senna didymobotrya (Fresen.) HSIrwin & Barneby was founded in 1982 by Howard Samuel Irwin and Rupert Charles Barneby published . Further synonyms for Senna didymobotrya (Fresen.) HSIrwin & Barneby are: Cassia didymobotrya L. Cassia nairobensis L.H.Bailey , Cassia nairobiensis L.H.Bailey and Cassia verdickii De Wild.
Individual evidence
- ↑ a b c d e f g h i Dezhao Chen, Prof. Dianxiang Zhang, Ding Hou: Senna didymobotrya , p. 30 - same text online as the printed work , Wu Zheng-yi, Peter H. Raven & Deyuan Hong (eds.) : Flora of China , Volume 10 - Fabaceae , Science Press and Missouri Botanical Garden Press, Beijing and St. Louis, 2010, ISBN 978-1-930723-91-7 .
- ↑ a b c d Entry at Dave's Garden . (engl.)
- ↑ a b c d Entry in Swaziland's Alien Plants Database . (engl.)
- ^ Cassia didymobotrya at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ^ Howard Samuel Irwin, Rupert Charles Barneby: The American Cassiinae: a synoptical revision of Leguminosae tribe Cassieae subtribe Cassiinae in the New World . In: Memoirs of the New York Botanical Garden . tape 35 , 1982, pp. 467 .
Web links
- Cassia didymobotrya . In: U. Brunken, M. Schmidt, S. Dressler, T. Janssen, A. Thiombiano, G. Zizka: West African plants - A Photo Guide. Senckenberg Research Institute, Frankfurt am Main 2008.