Elymus repens , commonly known as couch grass , is a perennial species of grass that is very common in most of Europe, Asia, the arctic biology, and western Africa sea. These have been brought to other mild northern climates for foraging or erosion control, but are often regarded as weeds.
Other names include public couch , wrinkles , fast grass , grass quitch b), dog lawn , quackgrass , scutch grass , and witchgrass .
Video Elymus repens
Description
It has a creeping rhizome that allows it to grow fast in the meadow. It has flat and hairy leaves with erect flower nails. The stem ('rod') grows up to 40-150 cm; the leaves are linear, 15-40 cm long and 3-10 mm wide at the base of the plant, with leaves higher on the stems 2-8.5 mm. Flower spike 10-30 cm long, with 1-2 cm divisions, 5-7 mm wide and 3 mm thick with three to eight buds. Length is 7-12 mm, usually without awn or just short.
It flowers in late June to August in the northern hemisphere.
Maps Elymus repens
Taxonomy
Various taxonomic subdivisions of this species have been proposed. In addition, assigned to various genera ( Elymus , Elytrigium , Agropyron ). In the recent classification, three subspecies are distinguished, one of them with additional variations:
- Elytrigia repens subsp. repens . Throughout most species ranges.
- Elytrigia repens subsp. repens var. repens . Awn usually does not exist or if it exists, it is very short.
- Elytrigia repens subsp. repens var. aristata (DÃÆ'¶ll) P.D. Awns are present, up to 15 mm.
- Elytrigia repens subsp. elongatiformis (Drobow) Tzvelev (sync Elytrigia elongatiformis (Drobow) Nevski). Central and southwest Asia, southeast Europe (Ukraine).
- Elytrigia repens subsp. longearistata N. R. Cui. West China (Xinjiang).
Hybrids are recorded with some related grasses, including Elytrigia juncea Elytrigia laxa (Pater) Kerguà © len), Elytrigia atherica (< Elytrigia ÃÆ'â € "drucei Stace), and with barley species
Ecology
The leaves are the feed grass that is important for many grazing mammals. The seeds are eaten by several species of prairie birds, especially buntings and finches. The caterpillars of some Lepidoptera use them as foodplants, eg. captain of Essex ( Thymelicus lineola ).
Eradication
The sofa grass has become naturalized throughout the world, and is often listed as an invasive weed. It is very difficult to remove from the garden environment, because the thin rhizomes are entangled between the roots of the bush and the perennials, and any cut pieces of rhizomes can grow into new plants. It is possible to loosen the earth around the plant, and carefully pull out a complete rhizome. This is best done in the spring, when disturbed plants can recover. Another method is to dig deeper into the ground to get rid of as much grass as possible. The area should be covered with a thick layer of woodchip. To prevent further regrowth, cardboard can be placed under woodchips. Long white rhizomes will dry and die if left on the surface. Many herbicides will also control it.
Apps
The dried rhizome of the sofa grass is broken down and used as incense in the northern European medieval where other resin-based incense types are not available. Elymus repens ( Agropyron repens ) rhizomes have been used in traditional Austrian medicine against fever, internally as tea, syrup, or cold maceration in water, or applied externally as a crude medicine.
References
External links
- The Species Profile - Quackgrass ( Elymus repens ), National Invasive Species Information Center, National Agricultural Library of the United States. Includes general information and resources for Quackgrass.
Source of the article : Wikipedia
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