Elymus magellanicus, commonly called Magellan wheatgrass or blue wheatgrass, is a cool season perennial grass that is native to alpine areas in southern Patagonia (far southern parts of Chile and Argentina). It is grown in landscapes today for enjoyment of its exceptional metallic blue leaves which many consider to have the best blue colour of all blue-leaved grasses. Flat, narrow, linear, pointed leaf blades grow in a dense foliage clump to 16' tall. As they age, the older leaves arch outward revealing the central, more erect, intensely blue new growth. Thin, stiff, upright blue flowering stems topped by wheat-like pale blue-green flower spikes rise above the leaves in late spring to early summer to 24-30". Flowers are light blue-gray, but turn tan with age. Although the flower stems gracefully sway in the breeze, they are not particularly ornamental. When mature, the blue flowers turn tan with the flower spikes purportedly resembling the fruit spikes of wheat, hence the common name of blue wheatgrass.Genus name comes from the Greek word elymos used for a type of grain.Specific epithet means of the region of the Straits of Magellan which is the South American water route separating southern Chile and Tierra del Fuego.‘Blue Tango’ is a cultivar that purportedly features more intense blue foliage colour than that found on the species. It is sometimes sold in commerce under the name of Agropyron magellanicum 'Blue Tango'.
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