Round-leaved rabbit ear

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Round-leaved rabbit ear
Round-leaved rabbit ear (Bupleurum rotundifolium)

Round-leaved rabbit ear ( Bupleurum rotundifolium )

Systematics
Euasterids II
Order : Umbelliferae (Apiales)
Family : Umbelliferae (Apiaceae)
Subfamily : Apioideae
Genre : Rabbit ears
Type : Round-leaved rabbit ear
Scientific name
Bupleurum rotundifolium
L.

The round-leaved rabbit's ear ( Bupleurum rotundifolium ), also known as field rabbit's ear , through-growing rabbit's ear or through-growing rabbit's ear , is an umbellifer that rarely to very rarely occurs in Central Europe .

Appearance

The annual herbaceous plant is about 15 to 50 cm high. The stem is strong, up to 3 mm thick at the base and branched in the upper part. The leaves are egg-shaped. The lower ones are somewhat narrowed at the base and stalked or sessile, the middle and upper ones are streaky.

The umbels are usually 5 to 7-pointed and have no shell. The usually 5 to 6 husk leaves are rounded, egg-shaped, yellow-green and pointed. They are two to three times as long as the döldchen. The crown is golden yellow.

fruit

The fruit is black, about 3 to 4 mm long, elliptical in shape and has little protruding ribs.

Flowering plants have a striking, if only very superficial, habitus resemblance to some types of milkweed . The species blooms mainly in the months of June to August.

The number of chromosomes is 2n = 16, less often 22.

Location claims and distribution

Bupleurum rotundifolium grows in arable weed communities. It prefers dry, nutrient-rich and calcareous, loamy or clay soils. It occurs in Central Europe especially in the Sedo-Neslietum and is a type of Caucalidion association. The round-leaved rabbit's ear occurs in Central and Southern Europe to the Caucasus and Persia. It can also be found adventurously in North America, Australia and New Zealand.

Because of the intensification of arable farming, the species has declined sharply. In Switzerland, the species is rare and endangered, and in some areas it is also threatened with extinction. Bupleurum rotundifolium is very rarely found in the central area in Germany. In addition, it is only occasionally carried off. In Austria the through-wax rabbit ear occurs rarely to very rarely, especially in the Pannonian region . The deposits extend to the federal states of Vienna , Lower Austria and Burgenland as well as inconsistent or only locally to Styria and Carinthia . The species became extinct in Upper Austria , Tyrol and Vorarlberg . In Central Europe, the species has practically only a chance to survive in strips of field margins or in fields cultivated in the sense of wild herb protection. In the landscape protection area open spaces around Giershagen, the species, which was already extinct in North Rhine-Westphalia, was rediscovered in 2019 on a field of a nature conservation association that was managed in the sense of protecting the Segetal vegetation.

The species probably only immigrated to Europe with humans. The original homeland is probably the Middle East.

photos

  • Habit blooming

  • Fruiting habit

  • Inflorescences

  • Streaky leaves

  • Fruit cluster

Species protection

Endangerment in Germany: Category 1: threatened with extinction.

The throughgrow hare's ear is considered endangered in Austria and threatened with extinction in the northern foothills of the Alps.

Common names

For the round-leaved rabbit's ear there are or existed, in some cases only regionally, the other German-language trivial names : Bruchwurz, Dürwachs ( Bernese Oberland ), Durchkrant, Durchwachs, Hasenöhrlein ( Thuringia ), Navelkraut and Stopsloch (in Westrich ).

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.  706 .
  2. ^ A b Manfred A. Fischer, Karl Oswald, Wolfgang Adler: Excursion flora for Austria, Liechtenstein and South Tyrol . 3rd, improved edition. Province of Upper Austria, Biology Center of the Upper Austrian State Museums, Linz 2008, ISBN 978-3-85474-187-9 , p. 847 .
  3. ↑ Richard Götte: The Kalkofenacker, a treasure chest for rare wild herbs . Irrgeister 36, 2019: 10-16
  4. ^ Georg August Pritzel , Carl Jessen : The German folk names of plants. New contribution to the German linguistic treasure. Philipp Cohen, Hannover 1882, page 70, online.

literature

  • Henning Haeupler , Thomas Muer: picture atlas of the fern and flowering plants of Germany (= the fern and flowering plants of Germany. Volume 2). Published by the Federal Agency for Nature Conservation. Ulmer, Stuttgart 2000, ISBN 3-8001-3364-4 .
  • Sebald, Seybold, Philippi: The fern and flowering plants of Baden-Württemberg , Ulmer Verlag, Stuttgart, 1990, ISBN 3-8001-3314-8
  • Wolfgang Adler, Karl Oswald, Raimund Fischer: Excursion flora of Austria. Ed .: Manfred A. Fischer . Ulmer, Stuttgart / Vienna 1994, ISBN 3-8001-3461-6 .
  • August Binz , Christian Heitz: School and excursion flora for Switzerland , Schwabe & Co. AG, Basel, 1986, ISBN 3-7965-0832-4
  • Erich Oberdorfer : Plant-sociological excursion flora , Ulmer Verlag, Stuttgart, 1990, ISBN 3-8001-3454-3

Web links

Commons : Round-leaved rabbit-ear  album with pictures, videos and audio files