Roof brim

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Roof brim
Illustration: Roof Trespe (Bromus tectorum), left and Field Trespe (Bromus arvensis), right

Illustration: Roof Trespe ( Bromus tectorum ), left and Field Trespe ( Bromus arvensis ), right

Systematics
Commelinids
Order : Sweet grass (Poales)
Family : Sweet grasses (Poaceae)
Subfamily : Pooideae
Genre : Brome ( Bromus )
Type : Roof brim
Scientific name
Bromus tectorum
L.

The roof bromus ( Bromus tectorum ) is a species of the sweet grass family (Poaceae). It grows mainly in fields and short-lived weed meadows.

description

panicle
Stem with leaf sheath and ligule
Roof brome ( Bromus tectorum )
The panicle branches are downy.
Spikelets
The vascular bundles of the lemma emerge only indistinctly.

The roof brine is an annual herbaceous plant . The deciduous therophyte reaches heights of between 10 and 60 centimeters and grows individually to loosely clumpy. The leaves reach up to 20 centimeters in length and 2 to 4 millimeters in width. The leaf blades are pubescent and gradually pointed. The torn ligules measure between 3 and 5 millimeters. The leaf sheaths are tubular, closed on the ventral side and also softly hairy. The stalks are hairy only immediately below the inflorescence.

The inflorescence is a more or less contracted, nodding, one-sided overhanging panicle . The hairy panicle branches are alternately on opposite sides of the four-edged flower axis and carry 4 to 12 spikelets . These are four to nine flowered and are between 25 and 35 millimeters long. The ovate to elongated lemmas, rounded on the back, have two teeth. The awn rises below the bay, which is formed by these teeth. The rough awn is between 10 and 18 mm long.

The flowering period is between May and July.

The number of chromosomes is 2n = 14.

Distribution and location

The distribution area of ​​the roof bricks originally included all of Europe and the Mediterranean area with North Africa and the Arabian Peninsula to Mongolia and China. The species was introduced to North America, South America, South Africa, New Zealand, Australia and Hawaii and is now naturalized almost everywhere. In the Allgäu Alps in Bavaria it rises to the summit of the Aggenstein up to 1986 meters above sea level.

The grass grows on dry, warm, moderately nutrient-rich soils, often in gappy ruderal corridors as a pioneer . It is a character species of the order Sisymbrietalia, but also occurs in societies of the order Corynephoretalia.

Taxonomy

The scientific name Bromus tectorum was first published in 1753 by Carl von Linné in Species Plantarum . Together with similar species, the roof brome is often separated from the genus Bromus and is then called Anisantha tectorum (L.) Nevski .

literature

  • Henning Haeupler, Thomas Muer: picture atlas of the fern and flowering plants of Germany . Ed .: Federal Agency for Nature Conservation (=  The fern and flowering plants of Germany . Volume 2 ). Eugen Ulmer, Stuttgart (Hohenheim) 2000, ISBN 3-8001-3364-4 .
  • Charles Edward Hubbard: Grasses. Description, distribution, use (=  UTB . Volume 233 ). 2nd, revised and expanded edition. Eugen Ulmer, Stuttgart (Hohenheim) 1985, ISBN 3-8001-2537-4 (English: Grasses . Translated by Peter Boeker).
  • 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 .

Individual evidence

  1. ↑ 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 . Page 206.
  2. ^ Rafaël Govaerts (Ed.): Bromus tectorum. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved November 5, 2016.
  3. ↑ Erhard Dörr, Wolfgang Lippert : Flora of the Allgäu and its surroundings. Volume 1, IHW, Eching 2001, ISBN 3-930167-50-6 , p. 203.
  4. ↑ Carl von Linné: Species Plantarum. Volume 1, Lars Salvius, Stockholm 1753, p. 77, digitizedhttp: //vorlage_digitalisat.test/1%3Dhttp%3A%2F%2Fwww.biodiversitylibrary.org%2Fopenurl%3Fpid%3Dtitle%3A669%26volume%3D1%26issue%3D%26spage%3D77%26date%3D1753~GB%3D~ IA% 3D ~ MDZ% 3D% 0A ~ SZ% 3D ~ double-sided% 3D ~ LT% 3D ~ PUR% 3D

Web links

Commons : Roof Trespe  - Album with pictures, videos and audio files