One-headed piglet weed

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One-headed piglet weed
Hypochaeris uniflora a2.jpg

Single-headed piglet weed ( Hypochaeris uniflora )

Systematics
Euasterids II
Order : Astern-like (Asterales)
Family : Daisy family (Asteraceae)
Subfamily : Cichorioideae
Genre : Piglet Herbs ( Hypochaeris )
Type : One-headed piglet weed
Scientific name
Hypochaeris uniflora
Vill.

The Single-headed catsear ( Hypochaeris uniflora ) is a plant from the genus of hypochaeris ( Hypochaeris ) within the family of Compositae (Asteraceae).

description

The hairy stem below the single flower head is thickened.
Single-headed piglet weed ( Hypochaeris uniflora )

The one-headed piglet is a deciduous, perennial herbaceous plant that reaches heights of 15 to 50 cm. The stem is erect. The stem leaves are stiff and hairy gray-tomentose. A basal leaf rosette is formed from two to seven leaves , which are always present during flowering. The basal leaves are sessile, lanceolate to narrowly ovate, irregular and distantly dentate, rough hairy and always unspotted.

The flowering period extends from July to September. There is only one terminal cup-shaped inflorescence on each leafless stem . The end of the stem is strongly thickened below the flower head. The blackish, curly haired bracts are lanceolate and irregularly fringed with a length of 20 to 25 mm. On the bottom of the basket there are ruler-shaped chaff leaves . The flower head has a diameter of 3.5 to 6 cm, measured with the flowers spread out. The flower heads only contain ray florets , which are hermaphroditic and light golden yellow.

The 1.5 cm long achenes end in a 3 to 4 mm long beak. The pappus consists of a row of yellowish-white, feathery bristles.

The number of chromosomes is 2n = 10.

Occurrence

The distribution area of ​​the single-headed piglet includes France, Italy, Switzerland, Germany, the Czech Republic, Austria, Liechtenstein, Slovenia, Poland, Slovakia, the Ukraine and Romania. The single-headed piglet is rarely found in the Sudetes. It can be found scattered in the Alpine region, often in a number of individuals, but loose, preferably at altitudes between 1500 and 2500 meters. In the Allgäu Alps, it rises to an altitude of around 2100 meters.

The single-headed piglet needs lime-free, peaty-humic, low-nitrogen clay soil . It settled alpine meadows and pastures and stony-patchy, half-bog mats . It is a character species of the Aveno-Nardetum from the association Nardion.

literature

  • Henning Haeupler, Thomas Muer: picture atlas of the fern and flowering plants of Germany . Published by the Federal Agency for Nature Conservation (=  The fern and flowering plants of Germany . Volume 2 ). 2nd corrected and enlarged edition. Eugen Ulmer, Stuttgart (Hohenheim) 2007, ISBN 978-3-8001-4990-2 .
  • Dietmar Aichele, Heinz-Werner Schwegler: The flowering plants of Central Europe . 2nd Edition. tape 4 : Nightshade plants to daisy plants . Franckh-Kosmos, Stuttgart 2000, ISBN 3-440-08048-X .
  • One-headed piglet weed. In: FloraWeb.de.

Individual evidence

  1. ↑ a b Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . With the collaboration of Angelika Schwabe and Theo Müller. 8th, heavily revised and expanded edition. Eugen Ulmer, Stuttgart (Hohenheim) 2001, ISBN 3-8001-3131-5 , pp.  977 .
  2. ↑ Werner Greuter (2006+): Compositae (pro parte majore). - In: W. Greuter & E. von Raab-Straube (ed.): Compositae. Euro + Med Plantbase - the information resource for Euro-Mediterranean plant diversity. Datasheet Hypochaeris uniflora In: Euro + Med Plantbase - the information resource for Euro-Mediterranean plant diversity.
  3. ↑ Erhard Dörr, Wolfgang Lippert : Flora of the Allgäu and its surroundings. Volume 2, IHW, Eching 2004, ISBN 3-930167-61-1 , p. 656.

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