Alpine tragacanth
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Alpine tragacanth ( Astragalus alpinus ) |
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The alpine tragacanth ( Astragalus alpinus ) is a species of the genus tragacanth ( Astragalus ) in the legume family (Fabaceae).
description
Vegetative characteristics
The alpine tragacanth is a perennial herbaceous plant that reaches heights of 5 to 20, rarely up to 30 centimeters. The above-ground parts of the plant are scattered with simple, gray hairs . The stem is prostrate to ascending.
The alternate leaves are pinnate unpaired . Most of the 13 to 25 leaflets are elliptical and obtuse. The top of the leaflets is bare. The stipules are 3 to 5 millimeters long and membranous.
Generative characteristics
The flowering period extends from June to August. In each case 5 to 15 protruding or nodding flowers stand together in a racemose inflorescence . The flower stalks are 1 to 2 millimeters long.
The hermaphrodite flowers are zygomorphic and five-fold with a double flower envelope . The five sepals are slightly longer than fused to a calyx tube up to their middle. The white-purple crown has the typical shape of the butterfly flowers . The flag is light blue. The boat is white with a blue-violet top and as long as the flag. The entire wings are whitish, entire and shorter than the shuttle.
The hanging legume is puffy and hairy with black shaggy hair.
The number of chromosomes is 2n = 16 or 32.
Occurrence
The alpine tragacanth occurs in the Alps , the Pyrenees , the Carpathian Mountains , the Caucasus , in Central Asia and in the Arctic region subalpine to alpine on grass and moraines on calcareous soils at altitudes of up to 3100 meters. It occurs mainly in the Elynetum, is nationwide a class of character of the Nackedied societies (Carici rupestris-Kobresietea bellardii class), but also occurs in plant societies of the Seslerion albicantis association. In the Allgäu Alps in Bavaria, it rises at the summit of the Linkerskopf to an altitude of 2450 meters.
literature
- Xaver Finkenzeller, Jürke Grau: Alpine flowers (Steinbach's natural guide). Mosaik Verlag GmbH, Munich 1996, ISBN 3-576-10558-1 .
Individual evidence
- ↑ a b c d e f g h Astragalus alpinus L., Alpine tragacanth. In: FloraWeb.de.
- ↑ a b Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas. 8th edition. Verlag Eugen Ulmer, Stuttgart 2001, ISBN 3-8001-3131-5 . Page 602.
- ↑ Erhard Dörr, Wolfgang Lippert : Flora of the Allgäu and its surroundings. Volume 2, IHW, Eching 2004, ISBN 3-930167-61-1 , p. 141.
Web links
- Alpine tragacanth . In: BiolFlor, the database of biological-ecological characteristics of the flora of Germany.
- Profile and distribution map for Bavaria . In: Botanical Information Hub of Bavaria .
- Astragalus alpinus L. In: Info Flora , the national data and information center for Swiss flora . Retrieved November 19, 2015.
- Distribution in the northern hemisphere according to Eric Hultén .
- Thomas Meyer: Data sheet with identification key and photos at Flora-de: Flora von Deutschland (old name of the website: Flowers in Swabia ).
- Wanted poster with photos.
