Hanging tragacanth

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Hanging tragacanth
Hanging tragacanth (Astragalus penduliflorus)

Hanging tragacanth ( Astragalus penduliflorus )

Systematics
Order : Fabales (Fabales)
Family : Legumes (Fabaceae)
Subfamily : Butterflies (Faboideae)
Tribe : Galegeae
Genre : Tragacanth ( astragalus )
Type : Hanging tragacanth
Scientific name
Astragalus penduliflorus
Lam.

The hanging tragacanth ( Astragalus penduliflorus ), also known as hanging-flowered tragacanth or Alpine bladder pod or bladder tragacanth (this German book name is also used for Astragalus vesicarius !), Is a species of the tragacanth genus ( Astragalus ) within the legume family (Fabaceae) .

description

Illustration from Atlas of Alpine Flora
Racemose inflorescence with zygomorphic flowers
Puffed legumes

The hanging tragacanth grows as a perennial herbaceous plant that reaches heights of 20 to 80 centimeters. The ascending to independently upright stem is branched and mostly hairy ( indument ). The fresh green, pinnate leaf blade has 7 to 15 pairs of leaflets. The softly hairy leaflets are elliptical to lanceolate with a width of 3 to 6 millimeters. The stipules are 3 mm wide.

Flowering time is from July to August. The inflorescence stem is 1–1.5 times as long as the associated leaf. The flowers stand together in a relatively short racemose inflorescence . The hermaphrodite flowers are zygomorphic and five-fold with a double flower envelope . The yellow corolla has the typical structure of butterfly flowers and is 9 to 13 millimeters long.

The rough hairy and balding legume is puffed up with a length of 20 to 30 millimeters and a diameter of 10 to 15 millimeters.

The species has chromosome number 2n = 16.

Importance as a forage plant

The hanging tragacanth is a protein-rich fodder plant , but since it cannot tolerate mowing or intensive grazing , its populations are declining.

Occurrence

The main area of the hanging tragacanth lies in Siberia and extends to Northern Europe . In the central chains of Switzerland it occurs scattered; it is rare in the rest of the Alps and in Sweden .

The hanging tragacanth colonizes alpine stone lawns and gappy mats in Central Europe , but also occurs on moraines and paved stone rubble . It prefers south and west slopes or sunny locations. In the Alps, it occurs mainly at altitudes between 1500 and 2500 meters, locally also a little higher and occasionally also a little deeper due to runoff . It is very rare in the Northern Limestone Alps , rare in the Southern Limestone Alps, and also in the central Central Alps . In the Allgäu Alps, it climbs up to 2000 m on the central ridge of the Höfats .

The hanging tragacanth thrives best on stony, lime-poor , loose, somewhat humus-containing loam or clay soils in alpine locations. It thrives in societies of the Festucion variae, the order Erico-Pinetalia, Astragalo-Pinetalia or Seslerietalia.

Taxonomy

It was first published by Jean-Baptiste de Lamarck . A synonym for Astragalus penduliflorus Lam. is Phaca alpina L.

literature

  • Otto Schmeil , Jost Fitschen (greeting), Siegmund Seybold : The flora of Germany and the neighboring countries. A book for identifying all wild and frequently cultivated vascular plants. 95th completely revised u. exp. Edition. Quelle & Meyer, Wiebelsheim 2011, ISBN 978-3-494-01498-2 .
  • Henning Haeupler , Thomas Muer: picture atlas of the fern and flowering plants of Germany (= the fern and flowering plants of Germany. Volume 2). 2nd, corrected and enlarged edition. Published by the Federal Agency for Nature Conservation. Ulmer, Stuttgart 2007, ISBN 978-3-8001-4990-2 .
  • Dietmar Aichele, Heinz-Werner Schwegler: The flowering plants of Central Europe. Franckh Kosmos Verlag, 2nd revised edition 1994, 2000, Volume 2, ISBN 3-440-08048-X .
  • Dietmar and Renate Aichele, Heinz-Werner and Anneliese Schwegler: Flowers of the Alps and the Nordic countries. Franckh'sche Verlagshandlung W. Keller & Co, Stuttgart 1977, ISBN 3-440-04352-5 .

Individual evidence

  1. ↑ a b Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . 8th edition. Stuttgart, Verlag Eugen Ulmer, 2001. Page 602. ISBN 3-8001-3131-5
  2. ↑ Erhard Dörr, Wolfgang Lippert : Flora of the Allgäu and its surroundings. Volume 2, IHW, Eching 2004, ISBN 3-930167-61-1 , pp. 142-143.

Web links

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