{"id":7311,"date":"2013-03-27T12:53:02","date_gmt":"2013-03-27T16:53:02","guid":{"rendered":"https:\/\/extension.umaine.edu\/blueberries\/?page_id=7311"},"modified":"2024-02-05T15:13:27","modified_gmt":"2024-02-05T20:13:27","slug":"tall-blue-lettuce","status":"publish","type":"page","link":"https:\/\/extension.umaine.edu\/blueberries\/weed-images\/herbaceous-broadleaf-weeds\/bluepurple-flowers\/tall-blue-lettuce\/","title":{"rendered":"Tall blue lettuce"},"content":{"rendered":"<p><em>Prepared by Jennifer L. D&#8217;Appollonio, Assistant Scientist, University of Maine, Orono, ME 04469. Updated April 2019.<\/em><\/p>\n<p><strong>Scientific name: <\/strong><em>Lactuca biennis<\/em> (Moench) Fern.<em><br \/>\n<\/em><\/p>\n<p><strong>Common name(s): <\/strong>tall blue lettuce, blue wood lettuce, woodland lettuce<\/p>\n<p><strong>Link(s): <\/strong><a href=\"https:\/\/plants.usda.gov\/home\/plantProfile?symbol=LABI\">USDA PLANTS Profile<\/a>,<a href=\"http:\/\/www.wildflower.org\/plants\/result.php?id_plant=LABI\"> NPIN Profile<\/a>, <a href=\"https:\/\/gobotany.nativeplanttrust.org\/species\/lactuca\/biennis\/\" 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-7311 gallery-columns-4 gallery-size-thumbnail'><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\/Lactuca-biennis-1.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-1-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca biennis in flower late July\" aria-describedby=\"gallery-1-8047\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-1-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-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-1-8047'>\n\t\t\t\tin flower, late 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\/Lactuca-biennis-006.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-006-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca biennis variable stem and leaves\" aria-describedby=\"gallery-1-8052\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-006-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-006-32x32.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-1-8052'>\n\t\t\t\tstem and leaves, can be variable\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\/2014\/02\/Lactuca-biennis-0041.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-biennis-0041-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca biennis example of leaf shape\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-biennis-0041-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-biennis-0041-32x32.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 landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lactuca-biennis18-005.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lactuca-biennis18-005-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca biennis leaves\" aria-describedby=\"gallery-1-16697\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lactuca-biennis18-005-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lactuca-biennis18-005-32x32.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-1-16697'>\n\t\t\t\tdark leaves\n\t\t\t\t<\/dd><\/dl><br style=\"clear: both\" \/><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\/Lactuca-biennis-004.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-004-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca biennis in mowed blueberry field\" aria-describedby=\"gallery-1-8050\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-004-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-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-1-8050'>\n\t\t\t\tin mowed field, late July\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\/Lactuca-biennis-005.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-005-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca biennis range of flower stages\" aria-describedby=\"gallery-1-8051\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-005-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-005-32x32.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-1-8051'>\n\t\t\t\trange of flower stages\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\/Lactuca-biennis-003.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-003-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca biennis flower\" aria-describedby=\"gallery-1-8049\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-003-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-003-32x32.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-1-8049'>\n\t\t\t\tflower\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\/2019\/04\/Lactuca-biennis18-002.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lactuca-biennis18-002-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"dark Lactuca biennis individual\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lactuca-biennis18-002-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lactuca-biennis18-002-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt><\/dl><br style=\"clear: both\" \/><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\/2014\/02\/Lactuca-biennis-0021.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-biennis-0021-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca biennis\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-biennis-0021-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-biennis-0021-32x32.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\/Lactuca-biennis-002.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-002-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca biennis flower head\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-002-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-002-32x32.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\/Lactuca-biennis-010.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-010-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca biennis milky sap\" aria-describedby=\"gallery-1-8046\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-010-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-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-1-8046'>\n\t\t\t\tmilky sap\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\/Lactuca-biennis-009.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-009-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca biennis late August\" aria-describedby=\"gallery-1-8045\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-009-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-biennis-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-1-8045'>\n\t\t\t\tlate August\n\t\t\t\t<\/dd><\/dl><br style=\"clear: both\" \/><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\/2014\/02\/Lactuca-biennis-canadensis-002.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-biennis-canadensis-002-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca species comparison\" aria-describedby=\"gallery-1-9386\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-biennis-canadensis-002-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-biennis-canadensis-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-1-9386'>\n\t\t\t\tL. biennis left, L. canadensis right\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>-annual or biennial<\/p>\n<p>-leaves are alternate and deeply pinnately lobed<\/p>\n<p>-may be confused with wild lettuce (<em>L. canadensis)<\/em>, especially when not in bloom; see left sidebar of <a href=\"https:\/\/gobotany.nativeplanttrust.org\/species\/lactuca\/biennis\/\" target=\"_blank\" rel=\"noopener noreferrer\">Go Botany<\/a> webpage. Can also hybridize with <em>L. canadensis<\/em>; see <em>Flora Novae Angliae <\/em>information at bottom of Go Botany webpage.<\/p>\n<p><strong>Habitat:<\/strong><\/p>\n<p>-disturbed areas<\/p>\n<p>-meadows and fields<\/p>\n<p>-forest edges<\/p>\n<p><strong>Natural History:<\/strong><\/p>\n<p>-Native Americans used the root to treat<\/p>\n<ul>\n<li>pain<\/li>\n<li>vomiting<\/li>\n<li>diarrhea<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><strong>Source(s):<\/strong><\/p>\n<p>Haines, A., Farnsworth, E., Morrison, G., &amp; New England Wild Flower Society. (2011). <i>New England Wildflower Society\u2019s Flora Novae Angliae: A manual for the identification of native and naturalized higher vascular plants of New England<\/i>. Framingham, MA: New England Wild Flower Society. p. 415.<\/p>\n<p>Go Botany. \u201cLactuca Biennis (Moench) Fern.\u201d <i>Lactuca Biennis (Tall Blue Lettuce): Go Botany<\/i>, 2020, gobotany.nativeplanttrust.org\/species\/lactuca\/biennis\/.<\/p>\n<div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Prepared by Jennifer L. D&#8217;Appollonio, Assistant Scientist, University of Maine, Orono, ME 04469. Updated April 2019. Scientific name: Lactuca biennis (Moench) Fern. Common name(s): tall blue lettuce, blue wood lettuce, woodland lettuce Link(s): USDA PLANTS Profile, NPIN Profile, Go Botany Images: (to see enlargements [PC]: click on image, then right click and choose &#8220;view image&#8221;) [&hellip;]<\/p>\n","protected":false},"author":218,"featured_media":0,"parent":6020,"menu_order":19,"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-7311","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>Tall blue lettuce - 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\/herbaceous-broadleaf-weeds\/bluepurple-flowers\/tall-blue-lettuce\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tall blue lettuce - 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 April 2019. Scientific name: Lactuca biennis (Moench) Fern. 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