Sand ostrich grass
|Sand ostrich grass|
Eyrst of the sand ostrich ( Agrostis vinealis )
The sand-bent grass ( Agrostis vinealis ), also Heath bentgrass or Schmalrispiges bentgrass called, is a plant from the genus of Agrostis ( Agrostis ) in the family of grasses (Poaceae). It is a pioneer plant on open sandy areas.
The ligule is up to 5 millimeters long. The leaf blades are about 15 inches long and 2 millimeters wide. The leaves of the non-flowering parts are bristle-shaped, the leaf blades of the stem leaves are rolled up and up to 2 millimeters wide.
The flowering period extends from June to September. The paniculate inflorescence is 2 to 10 inches long and up to 7 inches wide. The spikelets are single-flowered and 2 to 3 millimeters long. The glumes are glabrous and about the same length as the spikelets. The lemma is five-nerved and tender-skinned. The kneeled awn becomes 2 to 4 millimeters long; it can also be absent. The anthers are 1 to 1.5 millimeters long.
The fruit cluster is strongly contracted. The caryopsis is 1.5 to 1.7 millimeters long.
The number of chromosomes is 2n = 28 or 42.
The sand ostrich grass is a hemicryptophyte .
The sand ostrich differs from the dog ostrich ( Agrostis canina ) by the underground rhizomes instead of above-ground creeping shoots, the different chromosome numbers ( Agrostis canina : 2n = 14) and the clearly different location requirements.
Distribution and location requirements
The sand ostrich comes from Greenland via Central Europe, Russia, Mongolia and China to Alaska and reaches Turkey and North Africa via southeast Europe. The distribution area extends from subarctic and subalpine Eurasia and subarctic America to northwest Africa. While it is common in northern Germany, there are only a few occurrences in the Upper Rhine Plain in southwest Germany. In Switzerland there is evidence from the canton of Zurich on the Upper Rhine. The species from the area between Neubreisach and Ensisheim has been identified in Upper Alsace.
In Central Europe, Agrostis vinealis is found mainly on sandy soils that are poor in nutrients and bases (character species of the Sedo-Scleranthetea class; acid pointer; Ellenberg pointer values : L9, T7, K3, F2, R2, N1). It occurs on inland dunes and in drifting sand areas in older formations of the silver grass lawn (Corynephoretum canescentis), which mediate the dry sand lawn. Furthermore, it occurs in dwarf shrub heaths (order Calluno-Ulicetalia), light pine steppe forests (class Pulsatillo-Pinetea sylvestris), in disturbed grass grass (class Nardo-Callunetea) and also in wood-free rock and scree meadows (Association Asplenietea trichomanis) .
Agrostis vinealis was first published in 1771 by Johann Christian von Schreber . Scientific synonyms of Agrostis vinealis Schreb. are Agrostis stricta JFGmel. , Agrostis canina var. Coarctata (Ehrh. Ex Hoffm.) G.Mey. , Agrostis arida (Schltdl.) F. Herm. , Agrostis canina subsp. montana (Hartm.) Hartm. , Agrostis canina var. Arida Schltdl. , Agrostis canina var. Montana Hartm. , Agrostis coarctata Ehrh. ex Hoffm. and Agrostis pusilla Dumort.
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