Brown sedge

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Brown sedge
Brown Sedge Grass (Cyperus fuscus)

Brown Sedge Grass ( Cyperus fuscus )

Systematics
Commelinids
Order : Sweet grass (Poales)
Family : Sourgrass family (Cyperaceae)
Subfamily : Cyperoideae
Genre : Sedge grass ( Cyperus )
Type : Brown sedge
Scientific name
Cyperus fuscus
L.

The brown Zypergras ( Cyperus fuscus ) is a plant from the family of the sour grass plants (Cyperaceae).

description

Spikelets with fruits, the bracts are black-brown and have a green central stripe.
Sedge grass on the Elbe beach
The stem is sharply triangular in cross section.

The brown Zypergras reaches heights of growth of 3 to a maximum of 25, rarely up to 40 cm and is therefore a small-growing sour grass. This annual plant does not form runners , but small clumps. The smooth stems are sharp triangular. The up to 4 (rarely up to 5) mm wide leaves are usually as long as the stem.

The simple or compound inflorescence is a three- to eight-pointed spiral. The black-red, rarely yellow-green spikelets are 3 to 10 mm long. There are three scars. The yellow-brown fruit is about 1 mm long and 0.5 mm wide and has a sharp triangular shape with an attached spike tip.

The number of chromosomes is 2n = 72.

Location and distribution

The distribution area of Cyperus fuscus includes Europe, Macaronesia and extends from the Mediterranean area to China. The brown Zypergras grows on river banks, on pond floors and in drainage ditches. It germinates on muddy soil or humus sands when the water level drops in summer. There, the plant, often dwarfed, completes its life cycle before the growing areas are flooded when the water levels rise in autumn. It survives the winter as a seed ( therophyte ). The dwarf rush pond bottom communities in which the species grows are stable on these locations due to the seasonal fluctuations in the water level. It is a species of character of the order Cyperetalia fusci.

In these locations, this species is widespread throughout Germany, although not equally frequently everywhere. Regular occurrences exist especially on the streams.

Individual evidence

  1. ↑ a b Werner Rothmaler et al .: Excursion flora from Germany . Volume 4, 1990, p. 662
  2. ↑ a b c d Brown Zypergras. In: FloraWeb.de.
  3. ↑ 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 .
  4. ↑ Rafaël Govaerts (ed.): Cyperus fuscus. 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 : Braunes Zypergras  - album with pictures, videos and audio files