{"id":7402,"date":"2013-03-27T12:38:13","date_gmt":"2013-03-27T16:38:13","guid":{"rendered":"https:\/\/extension.umaine.edu\/blueberries\/?page_id=7402"},"modified":"2021-01-21T14:46:51","modified_gmt":"2021-01-21T19:46:51","slug":"quackgrass","status":"publish","type":"page","link":"https:\/\/extension.umaine.edu\/blueberries\/weed-images\/grasses-sedges-rushes\/quackgrass\/","title":{"rendered":"Quackgrass"},"content":{"rendered":"<p><em>Prepared by Jennifer L. D&#8217;Appollonio, Assistant Scientist, University of Maine, Orono, ME 04469. Updated February 2018.<\/em><\/p>\n<p><strong>Scientific name: <\/strong><em>Elymus repens\u00a0<\/em> (L.) Gould; old <em>Agropyron repens<\/em> L. (Beauv.)<em><br \/>\n<\/em><\/p>\n<p><strong>Common name(s): <\/strong>quackgrass, couch grass, dog grass, quickgrass, scutch, quitch, twitch, witchgrass, creeping wild-rye<\/p>\n<p><strong>Link(s): <\/strong><a href=\"https:\/\/plants.usda.gov\/core\/profile?symbol=ELRE4\" target=\"_blank\" rel=\"noopener noreferrer\">USDA PLANTS Profile<\/a>, <a href=\"https:\/\/gobotany.nativeplanttrust.org\/species\/elymus\/repens\/\" target=\"_blank\" rel=\"noopener noreferrer\">Go Botany<\/a><\/p>\n<p><em><strong>Images:<\/strong> (to see enlargements [PC]: click on image, then right click and choose &#8220;view image&#8221;)<\/em><\/p>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-1 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-1 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-1' class='gallery galleryid-7402 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-013.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-013-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Elymus repens June\" aria-describedby=\"gallery-1-8004\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-013-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-013-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-8004'>\n\t\t\t\tJune\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-1.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-1-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Elymus repens July\" aria-describedby=\"gallery-1-8005\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-1-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-1-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-8005'>\n\t\t\t\tJuly\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-009.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-009-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Elymus repens roots in June\" aria-describedby=\"gallery-1-8009\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-009-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-009-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-8009'>\n\t\t\t\troot system in June\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-004.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-004-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Elymus repens roots in July\" aria-describedby=\"gallery-1-8008\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-004-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-004-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-8008'>\n\t\t\t\troot system in July\n\t\t\t\t<\/dd><\/dl><br style=\"clear: both\" \/><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-010.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-010-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Elymus repens leaf detail\" aria-describedby=\"gallery-1-8002\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-010-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-010-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-8002'>\n\t\t\t\tleaf detail\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-007.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-007-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Elymus repens leaf hairs\" aria-describedby=\"gallery-1-8001\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-007-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-007-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-8001'>\n\t\t\t\tnote hairs on upper leaf surface only\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2017\/12\/Elymus-repens-2.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2017\/12\/Elymus-repens-2-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Elymus repens awns\" aria-describedby=\"gallery-1-12615\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2017\/12\/Elymus-repens-2-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2017\/12\/Elymus-repens-2-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-12615'>\n\t\t\t\tmid-June; note awns\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-012.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-012-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Elymus repens seedheads\" aria-describedby=\"gallery-1-8003\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-012-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-012-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-8003'>\n\t\t\t\tseedheads in June\n\t\t\t\t<\/dd><\/dl><br style=\"clear: both\" \/><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2017\/12\/Elymus-repens-5.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2017\/12\/Elymus-repens-5-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Elymus repens early July\" aria-describedby=\"gallery-1-12614\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2017\/12\/Elymus-repens-5-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2017\/12\/Elymus-repens-5-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-12614'>\n\t\t\t\tin flower, early July\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-005.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-005-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Elymus repens no awns\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-005-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-005-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-002.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-002-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Elymus repens variable inflorescence\" aria-describedby=\"gallery-1-8006\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-002-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Elymus-repens-002-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-8006'>\n\t\t\t\tinflorescence is variable\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<p><strong>Description:<\/strong><\/p>\n<p>&#8211; perennial<\/p>\n<p>&#8211; reproduces by seed and running stalk (rhizomes).<\/p>\n<p>&#8211; flowers July to Sept.<\/p>\n<p>&#8211; inflorescences are variable &#8211; can also have awns of varying length (awns: aka the &#8220;bristles&#8221; on a head of wheat)<\/p>\n<p>&#8211; considered an invasive species<\/p>\n<p>-Stems 1\u2032 to 4\u2032 tall with sheaths usually shorter than internodes<\/p>\n<p>-Leaf blades are 3\u2033 to 12\u2033 long and 1\/8\u2033 to 3\/8\u2033 wide<\/p>\n<ul>\n<li>smooth beneath and rough above. Ligule very short<\/li>\n<\/ul>\n<p>&#8211; may be confused with <em>E. trachycaulus<\/em>, which does not have rhizomes, or possibly <em>Thinopyrum pycnanthum<\/em> in ME fields abutting a coastal beach or marsh; see left sidebar on <a href=\"https:\/\/gobotany.nativeplanttrust.org\/species\/elymus\/repens\/\" target=\"_blank\" rel=\"noopener noreferrer\">Go Botany<\/a> webpage<\/p>\n<p><strong>Habitat:<\/strong><\/p>\n<p>-disturbed sites<\/p>\n<p>-meadows and fields<\/p>\n<p>-shores of rivers<\/p>\n<p>&nbsp;<\/p>\n<p>Sources:<\/p>\n<p>Go Botany. \u201cElymus Repens (L.) Gould.\u201d <i>Elymus Repens (Creeping Wild-Rye): Go Botany<\/i>, 2021, gobotany.nativeplanttrust.org\/species\/elymus\/repens\/.<\/p>\n<div><\/div>\n<p><strong>Acknowledgement(s):<\/strong><\/p>\n<p>Eric T. Doucette, Ph.D. &#8211; Assistant Professor of Biology, MA College of Liberal Arts, North Adams, MA (<em>updated Feb 2018<\/em>)<strong><br \/>\n<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Prepared by Jennifer L. D&#8217;Appollonio, Assistant Scientist, University of Maine, Orono, ME 04469. Updated February 2018. Scientific name: Elymus repens\u00a0 (L.) Gould; old Agropyron repens L. (Beauv.) Common name(s): quackgrass, couch grass, dog grass, quickgrass, scutch, quitch, twitch, witchgrass, creeping wild-rye Link(s): USDA PLANTS Profile, Go Botany Images: (to see enlargements [PC]: click on image, [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":3413,"menu_order":26,"comment_status":"closed","ping_status":"closed","template":"templates\/page-withsidebar.php","meta":{"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-7402","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Quackgrass - Cooperative Extension: Maine Wild Blueberries - University of Maine Cooperative Extension<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/extension.umaine.edu\/blueberries\/weed-images\/grasses-sedges-rushes\/quackgrass\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Quackgrass - Cooperative Extension: Maine Wild Blueberries - University of Maine Cooperative Extension\" \/>\n<meta property=\"og:description\" content=\"Prepared by Jennifer L. D&#8217;Appollonio, Assistant Scientist, University of Maine, Orono, ME 04469. Updated February 2018. Scientific name: Elymus repens\u00a0 (L.) Gould; old Agropyron repens L. (Beauv.) 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D&#8217;Appollonio, Assistant Scientist, University of Maine, Orono, ME 04469. Updated February 2018. Scientific name: Elymus repens\u00a0 (L.) Gould; old Agropyron repens L. (Beauv.) 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