{"id":5548,"date":"2012-04-05T10:38:56","date_gmt":"2012-04-05T14:38:56","guid":{"rendered":"https:\/\/extension.umaine.edu\/blueberries\/?page_id=5548"},"modified":"2024-02-06T15:21:35","modified_gmt":"2024-02-06T20:21:35","slug":"wild-lettuce","status":"publish","type":"page","link":"https:\/\/extension.umaine.edu\/blueberries\/weed-images\/herbaceous-broadleaf-weeds\/yellow-flowers\/wild-lettuce\/","title":{"rendered":"Wild lettuce"},"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>Lactuca canadensis <\/em>L. <em><br \/>\n<\/em><\/p>\n<p><strong>Common name(s): <\/strong>Canada lettuce, wild lettuce, tall lettuce<\/p>\n<p><strong>Link(s): <\/strong><a href=\"https:\/\/plants.usda.gov\/home\/plantProfile?symbol=LACA\" target=\"_blank\" rel=\"noopener noreferrer\">USDA PLANTS Profile<\/a>, <a href=\"http:\/\/www.wildflower.org\/plants\/result.php?id_plant=LACA\" target=\"_blank\" rel=\"noopener noreferrer\">NPIN Profile<\/a>,<a href=\"https:\/\/gobotany.nativeplanttrust.org\/species\/lactuca\/canadensis\/\" 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-5548 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-canadensis-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-canadensis-1-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca canadensis plant\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-canadensis-1-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2013\/04\/Lactuca-canadensis-1-32x32.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\/2014\/02\/Lactuca-canadensis-3.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-3-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca canadensis in blueberry field\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-3-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-3-32x32.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\/2014\/02\/Lactuca-canadensis-2.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-2-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca canadensis leaves can be variable\" aria-describedby=\"gallery-1-9640\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-2-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-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-1-9640'>\n\t\t\t\tleaves 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-canadensis-12.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-12-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca canadensis appearance variable\" aria-describedby=\"gallery-1-9646\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-12-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-12-32x32.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-1-9646'>\n\t\t\t\tappearance variable\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\/2014\/02\/Lactuca-canadensis-13.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-13-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca canadensis stem can be reddish\" aria-describedby=\"gallery-1-9647\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-13-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-13-32x32.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-1-9647'>\n\t\t\t\tstem can be reddish\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-canadensis-15.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-15-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca canadensis leaf midrib can be reddish\" aria-describedby=\"gallery-1-9648\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-15-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-15-32x32.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-1-9648'>\n\t\t\t\tleaf midrib can be reddish\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\/2014\/02\/Lactuca-canadensis-19.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-19-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca canadensis stem leaves can be clasping\" aria-describedby=\"gallery-1-9650\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-19-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-19-32x32.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-1-9650'>\n\t\t\t\tstem leaves can be clasping\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-canadensis-5.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-5-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca canadensis pre-flower, late June\" aria-describedby=\"gallery-1-9642\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-5-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-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-1-9642'>\n\t\t\t\tpre-flower, late June\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-canadensis-10.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-10-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca canadensis early flower\" aria-describedby=\"gallery-1-9644\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-10-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-10-32x32.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-1-9644'>\n\t\t\t\tearly flower\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\/2014\/02\/Lactuca-canadensis-18.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-18-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca canadensis yellow flowers, mid-July\" aria-describedby=\"gallery-1-9649\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-18-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-18-32x32.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-1-9649'>\n\t\t\t\tyellow flowers, mid-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\/2014\/02\/Lactuca-canadensis-11.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-11-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca canadensis late flower\" aria-describedby=\"gallery-1-9645\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-11-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-11-32x32.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-1-9645'>\n\t\t\t\tlate flower\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\/2014\/02\/Lactuca-canadensis-6.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-6-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca canadensis flower\/seed, late July\" aria-describedby=\"gallery-1-9643\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-6-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-canadensis-6-32x32.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-1-9643'>\n\t\t\t\tflower\/seed, late 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\/2014\/02\/Lactuca-biennis-canadensis-003.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-003-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lactuca biennis left L canadensis right\" aria-describedby=\"gallery-1-9390\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-biennis-canadensis-003-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lactuca-biennis-canadensis-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-1-9390'>\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>&#8211; annual or biennial<\/p>\n<p>&#8211; leaf appearance is variable<\/p>\n<ul>\n<li>simple<\/li>\n<li>alternate<\/li>\n<\/ul>\n<p>-flower head consists of ray flowers<\/p>\n<p>&#8211; can be confused with tall blue lettuce (<em>L. biennis<\/em>), especially when not in bloom; see left sidebar of <a href=\"https:\/\/gobotany.nativeplanttrust.org\/species\/lactuca\/canadensis\/\" target=\"_blank\" rel=\"noopener noreferrer\">Go Botany<\/a> webpage. Can also hybridize with <em>L. biennis<\/em>; see <em>Flora Novae Angliae <\/em>information at bottom of Go Botany webpage.<\/p>\n<p><strong>Habitat:<\/strong><\/p>\n<p>-disturbed sites<\/p>\n<p>-forest edges<\/p>\n<p>-meadows and fields<\/p>\n<p><strong>Natural History:<\/strong><\/p>\n<p>-nutritious leaves<\/p>\n<p>-edible when young raw or boiled<\/p>\n<p>&#8211;<span id=\"gloss1\" class=\"gloss\">Native<\/span> Americans used this to treat pain, calm, and stimulant the body<\/p>\n<p>-the milky <span id=\"gloss3\" class=\"gloss\">sap<\/span> was used as a topically to skin irritations and lesions<\/p>\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 Canadensis L.\u201d <i>Lactuca Canadensis (Tall Lettuce): Go Botany<\/i>, 2021, gobotany.nativeplanttrust.org\/species\/lactuca\/canadensis\/.<\/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 February 2018. Scientific name: Lactuca canadensis L. Common name(s): Canada lettuce, wild lettuce, tall 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;) Description: &#8211; annual [&hellip;]<\/p>\n","protected":false},"author":218,"featured_media":0,"parent":6086,"menu_order":33,"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-5548","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>Wild 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\/yellow-flowers\/wild-lettuce\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Wild 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 February 2018. Scientific name: Lactuca canadensis L. 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