"Grass" is a general term for plants that form closed plant cover as meadows or lawns. They serve as a food source for animals, prevent topsoil erosion, and decompose into nutrient-rich humus.
Distribution
Grass-like plants first appeared in the Cretaceous period, contributing significantly to the development of today’s landscapes. With over 12,000 species, the Poaceae (grasses) family is one of the largest flowering plant families, with global distribution. In addition, the Cyperaceae (sedge) family, with 5,500 species, is also widespread around the world.
In Europe, about 6,400 years ago, forests were steadily reduced to create grassland for livestock and farmland. In recent decades, species-rich, extensive meadows and pastures have been largely replaced by species-poor, monotonous grazing and grassland areas. Today, common forage grasses include perennial ryegrass (Lolium perenne), timothy (Phleum pratense), cocksfoot (Dactylis glomerata) and fescue grasses (Festuca pratensis, Festuca arundinacea).
Special Features
In addition to being a food source, grasses have increasing importance as a fiber provider, for alcohol production, and as building materials.
References (in German)