Bearded hornwort

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Bearded hornwort
Bearded Hornwort (Cerastium brachypetalum)

Bearded Hornwort ( Cerastium brachypetalum )

Systematics
Nuclear eudicotyledons
Order : Clove-like (Caryophyllales)
Family : Carnation family (Caryophyllaceae)
Subfamily : Alsinoideae
Genre : Horn herbs ( Cerastium )
Type : Bearded hornwort
Scientific name
Cerastium brachypetalum
Pers.

The bearded hornwort ( Cerastium brachypetalum ), also called small-flowered hornwort , is a species of the carnation family (Caryophyllaceae).

description

The indument is easy to see
blossom
Fruit: the sepals are clearly surmounted by glandless hair.
Open flower: the petals are ciliate at the base, the stamens are hairy.
The flower stalks are covered with protruding or slightly upward, often glandular hair.
Herbarium evidence

The bearded hornwort grows as a one to two year old herbaceous plant and reaches heights of about 5 to 30 cm. The above-ground parts of the plant are gray-green in color. The trichomes are gray and quite long. The whole plant can also be hairy glandular. The opposite leaves are oblong-egg-shaped, the lower ones narrowed into the petiole.

The bearded hornwort blooms mainly from April to June. The inflorescence is loose, only the uppermost branches are close together. All bracts are herbaceous and without a skin border. They are particularly hairy at the tip. The crown is white and shorter to at most as long as the calyx. The stamens are hairy.

The elongated, cylindrical capsule fruit pops up with ten teeth. The fruit stalk is about two to three times as long as the calyx.

The number of chromosomes is 2n = 52, 72 or 90, also 76.

Occurrence

Cerastium brachypetalum occurs from southern Scandinavia to southern Europe and to the east to Russia , Asia Minor and the Caucasus . It can also be found in North Africa .

In Austria it occurs sparsely to rarely and in Switzerland sparsely. In Germany the bearded hornwort is found absent-mindedly or rarely, especially in the southern part of Germany. It's rare in the north.

The bearded hornwort grows gregariously in gappy dry grass , on paths, embankments and cracks in the ground. It prefers dry, warm, moderately nutritious, calcareous loam or loess soils . In Central Europe it is a character species of Cerastietum pumili from the Alysso-Sedion association, but also occurs in societies of the Thero-Airion association.

Systematics

The following subspecies can be distinguished:

  • Cerastium brachypetalum Pers. subsp. brachypetalum : It occurs in Europe from the Azores, from southern, central, southeastern and eastern Europe to southern northern Europe.
  • Cerastium brachypetalum subsp. atheniense (Lonsing) PD Sell & Whitehead : It occurs in Greece.
  • Cerastium brachypetalum subsp. corcyrense (Möschl) PD Sell & Whitehead : It occurs in Greece.
  • Cerastium brachypetalum subsp. doerfleri (Hayek) PD Sell & Whitehead : It occurs in Crete.
  • Cerastium brachypetalum subsp. pindigenum (Lonsing) PD Sell & Whitehead : It occurs in Greece.
  • Cerastium brachypetalum subsp. roeseri (Boiss. & Heldr.) Nyman : It occurs in southern Europe, in North Africa and in the Middle East. The chromosome number is 2n = 76 or 72.
  • Cerastium brachypetalum subsp. tauricum (explosive) Murb. (Syn .: Cerastium tauricum Sprengel ): It occurs in North Africa, in South Europe, in Central and South East Europe, in South North Europe and in West Asia.
  • Tenores hornwort ( Cerastium brachypetalum subsp. Tenoreanum (Ser.) Soó , Syn .: Cerastium tenoreanum Ser. ): It occurs in Central Europe, in southern Northern Europe, in Southeastern Europe, in North Africa and in West Asia.

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 .
  • Wolfgang Adler, Karl Oswald, Raimund Fischer: Excursion flora of Austria. Ed .: Manfred A. Fischer . Ulmer, Stuttgart / Vienna 1994, ISBN 3-8001-3461-6 .
  • 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 .
  • Erich Oberdorfer : Plant-sociological excursion flora. With the collaboration of Theo Müller. 6th, revised and expanded edition. Eugen Ulmer, Stuttgart (Hohenheim) 1990, ISBN 3-8001-3454-3 .
  • Konrad von Weihe (ed.): Illustrated flora. Germany and neighboring areas. Vascular cryptogams and flowering plants. Founded by Christian August Friedrich Garcke . 23rd edition. Paul Parey, Berlin / Hamburg 1972, ISBN 3-489-68034-0 .

Individual evidence

  1. ↑ a b Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . 8th edition. Verlag Eugen Ulmer, Stuttgart 2001, ISBN 3-8001-3131-5 . Page 376.
  2. ↑ a b Cerastium brachypetalum at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
  3. ↑ a b c d e f g h i Karol Marhold: Caryophyllaceae . Cerastium brachypetalum . In: Euro + Med Plantbase - the information resource for Euro-Mediterranean plant diversity. Berlin 2011.

Web links

Commons : Bearded Hornwort ( Cerastium brachypetalum )  - Album with pictures, videos and audio files