Fresh green Zypergrass

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Fresh green Zypergrass
Fresh green sedge grass (Cyperus eragrostis)

Fresh green sedge grass ( Cyperus eragrostis )

Systematics
Commelinids
Order : Sweet grass (Poales)
Family : Sourgrass family (Cyperaceae)
Subfamily : Cyperoideae
Genre : Sedge grass ( Cyperus )
Type : Fresh green Zypergrass
Scientific name
Cyperus eragrostis
Lam.

The fresh green sedge ( Cyperus eragrostis ) is a species of the genus of the sedge ( Cyperus ) within the family of the sour grass plants (Cyperaceae). It comes from South America and is a neophyte in Europe .

description

inflorescence
Fruit cluster

The fresh green Zypergras is a perennial herbaceous plant that can be herbaceous under unfavorable climatic conditions and usually reaches heights of 40 to 60 centimeters. It has no runners . The bare stems are round to rounded triangular in cross-section. The 4 to 8 millimeters wide, grass-green ones. bare leaves can be flat or V-keeled in cross section.

The inflorescence consists of three to ten ears , each 2.5 to 5 centimeters, seldom longer stalked. Below are four to eight horizontal to slightly ascending bracts that are significantly longer than the inflorescence. The up to 10 centimeters long stalked ears are spherical and usually consist of 30 to 50 spikelets . These are elongated oval, about 3 millimeters wide and 5 to 15 millimeters long and the color is whitish green to, especially at the base, beige or golden brown. The spikelets usually contain 20 to 30 flowers and are flattened and keeled on both sides.

The number of chromosomes is 2n = 42.

Occurrence

The fresh green Zypergras is originally found in subtropical South America , in parts of North America and on Easter Island . However, it is now a neophyte in other parts of North America, as well as in parts of Europe , Australia , Asia , New Zealand and Macaronesia . It is believed that the species was introduced into the affected countries as an ornamental plant; it is still occasionally offered in stores today.

In Europe, the fresh green Zypergras is mainly found in the Atlantic and Mediterranean areas at altitudes of up to 500 meters (rarely up to 550 meters). The 1840s are given as the first evidence of existence in Europe. In Germany it was first found in Hamburg in 1854, where it is still found today. It thrives in Central Europe in societies of the Nanocyperion or Bidention associations.

The fresh green Zypergrass grows near open, sometimes wet, muddy, disturbed locations, for example as " weeds " in rice fields, on river banks, pond edges or next to drainage ditches. If there is no such location in the vicinity, drier places on wasteland or on roadsides are content.

Sources and further information

literature

  • P. Petřík: Cyperus eragrostis - a new alien plant species for the Czech flora and the history of its invasion of Europe , Preslia, Prague 2003 pp. 17–28.
  • 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 .

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.  157 .
  2. ↑ Rafaël Govaerts (ed.): Cyperus eragrostis. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved October 25, 2016.

Web links

Commons : Fresh green Zypergras ( Cyperus eragrostis )  - album with pictures, videos and audio files