Above: Photograph by dan.kristiansen via Flickr. Elymus arenarius. Water Requirements: Drought-tolerant; suitable for xeriscaping. Often it appear in association with Ammophila arenaria. Synonyms: Elymus arenarius L. (1) Common Name: lyme grass, beach wild rye, European dune grass, European lyme grass, rancheria grass, sand rye grass (2)(3) A. For more information, visit www.eddmaps.org. Tip: This grass tends to be less pesky in dry, clay soils. When several references are cited, they may give conflicting information on the status. Flowers are inconspicuous. Family: Poaceae (poh-AY-see-ee) Genus: Leymus (LEE-mus) Species: arenarius (ar-en-AR-ee-us) Cultivar: Blue Dune : Synonym: Elymus arenarius: One vendor has this plant for sale. Facts. Classification in Wisconsin: Prohibited/Restricted (Restricted in Door, Kenosha, Kewaunee, Manitowoc, Milwaukee, Ozaukee, Racine and Sheboygan counties; Prohibited elsewhere). Size: ... A non-invasive, tuft-forming, semi-evergreen grass with lovely, blue-green foliage whose colouration is most pronounced early in the season. Chemical: Foliar treat stems with Habitat (Imazapyr) herbicide mixed with Tactic surfactant at a rate of 1.5 ounces of each product per gallon of water. It has become established in Wisconsin and is especially troublesome on the Lake Michigan shoreline where it competes with native species, including Elymus lanceolatus. Species: Leymus arenarius; Distribution Table Top of page. Lyme grass (Leymus arenarius), with its fabulous blue foliage, is notoriously invasive but too good to ignore. It will spread in all directions. The species is hermaphrodite (has both male and female organs) and is pollinated by Wind. Leymus arenarius is known to take up nitrogen into its root system. Invasive Listing Sources. Cooperative Extension, which staffs local offices in all 100 counties and with the Eastern Band of Cherokee Indians. Each evergreen leaf is bright, light blue to blue-green in color and about 12 inches long and 1/2 inch wide. Formerly known as Elymus arenarius 'Glaucus', this Eurasian dune grass is the bluest ornamental grass of all. Slender beige flower spikes rise a foot above foliage in late summer. Spreads vigorously by rhizome, filling in large areas quickly, may require containment. Geographic Range: Reported in Door, … Family (Botanic): Poaceae. An invasive grass in coastal regions. As Lake Michigan's water levels have gone down, more areas have been colonized by this species. CURRENT STATUS AND DISTRIBUTION 1. States Counties Points List Species Info. The tan seed heads are carried on spikes from mid summer to late fall. Other System Links. Its form of fast vegetative growth can negatively affect native beach and dune vegetation. “Competition with other dune-building grasses such as Ammophila arenaria and Elymus farctus may restrict its distribution in certain areas in England…When sand deposition cease, other grass species, such as Festuca ruba, Festuca ovina and Poa spp., invade the dunes and eventually replace L. arenarius…The absence of safe-sites for germination could also be a reason for the decline of L. arenarius … Stems are smooth, round and stout; the plant is 2-4’ tall. Spreads vigorously by rhizome, filling in large areas quickly, may require containment. Extremely invasive in full sun. States Counties Points List Species Info. An invasive grass in coastal regions. Flowers in July. Southeastern Wisconsin Invasive Species Consortium, Inc. An invasive grass in coastal regions. (Leymus arenarius or Elymus arenarius) An invasive grass in coastal regions. This is a coastal sand dune stabilizer native to Europe. 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