Cyperus eragrostis
Fresh Green Zypergras
The fresh green purple nutsedge ( Cyperus eragrostis ), a plant belonging to the family of sour grass plants native to South America and in Europe is a neophyte.
Description
It is a multi-year, under unfavorable climatic conditions, annual grass that reaches heights between 40 cm and 60 cm in the rule. It has no foothills. The stems are round to rounded triangular, and just like the 4-8 mm wide, grass-green leaves bald. The sheets may be keeled flat or V -shaped in cross -section.
The inflorescence consists of 3-10 spikes that. Every 2.5 cm to 5 cm, are rarely stalked longer They include 4-8 horizontal to slightly ascending bracts, which are significantly longer than the inflorescence. The up to 10 cm long pedunculated ears are spherical and consist of mostly 30 to 50 spikelets. These are elongate oval, about 3 mm wide and 5-15 mm long and whitish green of the color of her up, especially at the base, beige or golden brown. They usually consist of 20 to 30 petals and are flattened on both sides and keel.
Habitat requirements and distribution
The species grows in the vicinity of open, sometimes wet, muddy disturbed habitats, such as a weed in rice fields, river banks, pond edges or adjacent drainage ditches. If such a location in the vicinity, it also notes with drier places on fallow land or be content on roadsides.
The species is native to subtropical South America and parts of North America, but is now naturalized in other parts of North America, and in parts of Europe, Australia, Asia and New Zealand and Macaronesia. It is believed that the species was introduced as an ornamental plant in the affected countries. It is still occasionally available commercially.
In Europe, the fresh green purple nutsedge mainly in the Atlantic and in the Mediterranean area in layers up to 500 meters (rarely to 550 m above sea level ) spread. As a first evidence of the existence in Europe, the 1840s are given. In Germany it was first found in 1854 in Hamburg, where it still exists today.