Lying crow's foot

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Lying crow's foot
Prostrate crow's foot (Lepidium coronopus)

Prostrate crow's foot ( Lepidium coronopus )

Systematics
Rosids
Eurosiden II
Order : Cruciferous (Brassicales)
Family : Cruciferous vegetables (Brassicaceae)
Genre : Cress ( Lepidium )
Type : Lying crow's foot
Scientific name
Lepidium coronopus
( L. ) Al-Shehbaz

The prostrate crow's foot ( Lepidium coronopus (L.) Al-Shehbaz , syn .: Lepidium squamatum Forssk. , Cochlearia coronopus L. , Coronopus procumbens Gilib. , Coronopus ruellii All. , Senebiera coronopus (L.) Poir. , Coronopus squamatus (Forssk .) Ash. ), Also called warty crow's foot , is a species of the genus Kressen ( Lepidium ) in the cruciferous family (Brassicaceae). It is quite rare in Central Europe .

description

This annual herbaceous plant reaches heights of about 5 to 30 cm. The stem grows prostrate or slightly ascending, is very branchy and bare from the bottom. The foliage leaves are deeply divided into pinnately split leaves .

The flowers sit in ball-shaped, racemose inflorescences . The pedicels are shorter than the flowers and fruits. The four petals are only about 1 to 2 mm long, white, and a little longer than the sepals. The flower has six stamens . This species mainly flowers from June to August.

The pods are almost kidney-shaped, compressed, reticulated and wrinkled with spikes, 3.5 to 4 mm wide and radially striped at the edge. They are crowned with a conical stylus and do not crack open when ripe. The seeds are 2 to 2.5 mm in length.

The species has chromosome number 2n = 32.

Lying crow's foot (enlarged detail of the flower with fruits)
Lying crow's foot (enlarged detail of the flower)
Lepidium coronopus

ecology

Both insect and self-pollination occur in this species.

The fruits are present in the months of July to November. It spreads by attaching it to the fur of animals or to the clothing of people, whereby the spikes on the fruits should be helpful.

Occurrence

General distribution

The prostrate crow's foot is native to Europe , West Asia, the Caucasus and North Africa. It is a neophyte in Macaronesia, South Africa, North America , Australia , New Zealand and Chile. It is a Mediterranean-sub-Mediterranean floral element . In Austria the species is rarely found in the Pannonian area and is endangered, in Switzerland it is also very rare.

Distribution in Germany

The low-lying crow's foot is only found scattered in Germany in the central area, otherwise it is seldom to very seldom to be found or is completely absent, especially in the mountainous areas.

Location requirements

The prostrate crow's foot grows in step plant communities . It prefers fresh, often somewhat salty, nitrogen-rich, heavy, mostly clayey loamy soils. In Central Europe it is a character species of the Poo-Coronopetum squamati from the association Polygonion avicularis.

Species protection

Endangerment in Germany: Category 3: endangered!

literature

Individual evidence

  1. ^ Lepidium coronopus in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland.
  2. ↑ a b Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . 8th edition. Stuttgart, Verlag Eugen Ulmer, 2001. ISBN 3-8001-3131-5
  3. ↑ a b Lepidium in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved July 28, 2017.

Web links

Commons : prostrate crow's foot ( Lepidium coronopus )  - album with pictures, videos and audio files