Leek-Hellerkraut

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Leek-Hellerkraut
Leek herb (Thlaspi alliaceum)

Leek herb ( Thlaspi alliaceum )

Systematics
Rosids
Eurosiden II
Order : Cruciferous (Brassicales)
Family : Cruciferous vegetables (Brassicaceae)
Genre : Hellerkräuter ( Thlaspi )
Type : Leek-Hellerkraut
Scientific name
Thlaspi alliaceum
L.

The leek leek herb ( Thlaspi alliaceum L.), also known as leek pocket herb , is a member of the cruciferous family (Brassicaceae) that is very rare and usually only inconsistent in Central Europe .

Appearance

The annual herbaceous plant reaches a height of about 20 to 60 cm. The whole plant is bare, only slightly hairy at the base when it is young, bluish to yellowish-green in color and smells clearly of garlic when rubbed . The stem grows upright, is simply or slightly branched and also grooved. The leaves are obovate to narrowly elongated. The lower ones are narrowed into the stalk, the middle and upper ones with lanceolate, somewhat spreading ears encompassing the stem.

The inflorescence is a bunch of grapes that elongates very much during the flowering period and often becomes more than 20 cm long. The species is also easy to recognize by the long grape. The petals are small, white and only about 2.5 to 3 mm long. The pods sit on up to 20 mm long stems, are 6 to 8 mm long and are obovate in shape. They are strong on the lower side and moderately arched on the upper side. The wings are narrow - in contrast to the Acker-Hellerkraut - and barely protrude at the tip of the pen, which is only about 0.3 mm long. The seeds have pitted, reticulated depressions.

The leek-hellerkraut flowers mainly in April, less often in May and June.

The chromosome number is 2n = 14.

Occurrence

Location requirements

Leek-Hellerkraut grows in arable weed fields - especially in tree nurseries - and in ruderal places. It prefers moderately fresh, nutrient-rich and alkaline-rich clay soil. It thrives in Central Europe in societies of the Fumario-Euphorbion association, but is a species of the Secalietea class in south-eastern Europe.

photos

  • Leek-Hellerkraut (location)
  • Leek-Hellerkraut (basal leaves)
  • Leek-Hellerkraut (stem leaves)
  • Leek-Hellerkraut (pods)

General distribution

The leek-Hellerkraut is originally found in Central and Southern Europe, in Turkey, Kenya, Tanzania and Ethiopia. It is a neophyte found in North America, Great Britain, and Ukraine. The species is very rare in Austria and Switzerland and only occurs sporadically.

Distribution in Germany

Leek-Hellerkraut is very rare in Germany and mostly only occurs temporarily. In some places it is lost. More recent confirmed occurrences are known from Günzburg / Donau (Bavaria), from Baden-Württemberg and from Leipzig.

Others

The name "Hellerkraut" or "Pfennigkraut" is derived from the roundish pods. The species, which is rare in Central Europe, is partly carried away through greening crops.

literature

  • Konrad von Weihe (ed.): Illustrated flora. Germany and neighboring areas. Vascular cryptogams and flowering plants . Founded by August Garcke. 23rd edition. Paul Parey, Berlin / Hamburg 1972, ISBN 3-489-68034-0 .
  • Oskar Sebald, Siegmund Seybold, Georg Philippi (Hrsg.): The fern and flowering plants of Baden-Württemberg . 2nd expanded edition. tape 2 : Special part (Spermatophyta, subclass Dilleniidae): Hypericaceae to Primulaceae . Eugen Ulmer, Stuttgart (Hohenheim) 1993, ISBN 3-8001-3323-7 .
  • 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 .
  • Christian Heitz: School and excursion flora for Switzerland. Taking into account the border areas. Identification book for wild growing vascular plants . Founded by August Binz. 18th completely revised and expanded edition. Schwabe & Co., Basel 1986, ISBN 3-7965-0832-4 .

Individual evidence

  1. ↑ a b c 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.  448 .
  2. ↑ a b Thlaspi in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved July 31, 2017.

Web links

Commons : Leek-Hellerkraut ( Thlaspi alliaceum )  - Album with pictures, videos and audio files