Weeding later is a real pain; literally painful due to the sharp leaves. 3 more photos VIEW GALLERY. It has been classified as invasive in Wisconsin, especially in areas that border Lake Michigan. Elymus arenarius. This species is Introduced in the United States. Maps . Macplants nursery is a plant nursery and garden centre located near Pencaitland, in East Lothian, near Edinburgh, in Scotland. Its form of fast vegetative growth can negatively affect native beach and dune vegetation. Applications may be made as early as June through early October as long as the leaves are still green. Noted for its incredibly beautiful blue-gray foliage, Leymus arenarius (Blue Lyme Grass) is a vigorous, semi-evergreen grass that grows in densely tufted, spreading clumps of gracefully arching, broad and flat, steel-blue leaves. Cool-season grass but tolerant of hot weather; steel-blue flat foliage; can be invasive (spreads by rhizomes). In summer, it produces stiff, upright, blue-gray spikes of flowers that turn buff. As Lake Michigan's water levels have gone down, more areas have been colonized by this species. It is stunning as a 2- to 3 feet-tall specimen in a flower border or when massed and used as a ground cover. This is a coastal sand dune stabilizer native to Europe. An invasive grass in coastal regions. Leaves are conspicuously blue in color and they stand out clearly from the green leaves of the native American dune-grass (Ammophila breviligulata Fernald). The genus Leymus includes about 50 species with ploidy levels ranging from 2n = 4x = 28 to 2n = 12x = 84, including octoploid L. arenarius (2n = 8x = 56) (Greipsson and Davy 1994). – sand ryegrass Subordinate Taxa. Blue Dune Lyme Grass (Photo courtesy of NetPS Plant Finder) Blue Dune Lyme Grass in fall. Spreads vigorously by rhizome, filling in large areas quickly, may require containment. Its bluish-green foliage and stout spikelets that contain more than one floret distinguish it from the common beach grass, Ammophila breviligulata, with which it often co-occurs. With a spreading root system, lyme grass can stabilize our naturally shifting dunes and compete with rare grasses. Descriptor: Plant(s) Image type: Field. 1 Review Add Your Review. It is hardy to zone (UK) 6 and is not frost tender. View lyme grass pictures in our photo gallery! Flowers: Dense spikes with 3 flowered spikelets; glumes are not longer than the spikelets. Invasive Plants of Wisconsin. Also known as Elymus arenarius. Tip: This grass tends to be less pesky in dry, clay soils. Selected Images. (Lyme grass) is native to Europe and has become an invasive alien species in the U.S. Of course, you have to choose it to play a specific role in a thoughtful landscape design, and plant it in the right environment. EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. Click on a scientific name below to expand it in the PLANTS Classification Report. 12” long and 0.5” wide. Stems are smooth, round and stout; the plant is 2-4’ tall. Further details may be available for individual references in the Distribution Table Details section which can be selected by going to Generate Report. Other Names: Elymus arenarius, Lymegrass. The species is hermaphrodite (has both male and female organs) and is pollinated by Wind. Leymus arenarius is a PERENNIAL growing to 1.2 m (4ft) by 2 m (6ft 7in) at a fast rate. Blue Lyme Grass: USDA Zone: 3-9: Plant number: 8.250.100 (Formerly Elymus glaucus) Grown for its display of exceptionally beautiful steel-blue foliage, this is a spreading grass that needs to be used carefully. phragmites (Phragmites australis) – Leslie J. Mehrhoff, Bugwood.org. The tan seed heads are carried on spikes from mid summer to late fall. Pot size: 2 Litre £ 9.99 Add to basket. Occupies the same dune habitat and poses a threat to several native rare plants which include: Horwood, A.R. Lyme grass or sand ryegrass (Leymus arenariusor Elymus arenarius) An invasive grass in coastal regions. YES NO 2. Get Our Newsletter. Distribution Record Density Literature vs Observation Login to download data. seedlings; a glasshouse experiment, University of East Anglia, Norfolk, England. More intense pastel blue blades are coveted for landscapes. Species can be differentiated based on overall plant size, leaf size and shape, flowerhead characteristics, and habitat. It is in flower from May to July, and the seeds ripen from September to October. For more information including identification, control methods and NR-40 status visit WDNR. Elymus arenarius. Blue Dune Lyme Grass tolerates sun, sand, erosion, and drought. 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