{"id":1291,"date":"2010-02-18T14:45:49","date_gmt":"2010-02-18T19:45:49","guid":{"rendered":"https:\/\/extension.umaine.edu\/cranberries\/?page_id=1291"},"modified":"2019-02-04T16:37:17","modified_gmt":"2019-02-04T16:37:17","slug":"ladysthumb-smartweed","status":"publish","type":"page","link":"https:\/\/extension.umaine.edu\/cranberries\/grower-services\/weeds\/ladysthumb-smartweed\/","title":{"rendered":"Ladysthumb \/ Smartweed"},"content":{"rendered":"<p><strong><a href=\"https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/SmartweedFlowering-071304.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-medium wp-image-1298\" src=\"https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/SmartweedFlowering-071304-236x300.jpg\" alt=\"Terminal portion of a smartweed plant flowering - 07\/13\/2004\" width=\"236\" height=\"300\" srcset=\"https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/SmartweedFlowering-071304-236x300.jpg 236w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/SmartweedFlowering-071304-105x133.jpg 105w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/SmartweedFlowering-071304-317x403.jpg 317w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/SmartweedFlowering-071304-423x537.jpg 423w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/SmartweedFlowering-071304.jpg 499w\" sizes=\"auto, (max-width: 320px) 85vw, (max-width: 768px) 67vw, (max-width: 1024px) 62vw,236px\" \/><\/a>Ladysthumb (Lady&#8217;s Thumb) or Smartweed <\/strong><\/p>\n<p><strong>Family:<\/strong> Polygonaceae (Buckwheat or Knotweed Family)<\/p>\n<p><strong>Genus:<\/strong> <em>Polygonum <\/em>(some sources use<em> persicaria <\/em>for the genus) | <strong>Species:<\/strong> <em>persicaria, vulgaris, <\/em>and\/or <em>caespitosum <\/em>(Most common member of this group, at least in the northeastern US, is called <strong>Pennsylvania Smartweed<\/strong> &#8211; <em>Polygonum Pensylvanicum<\/em>)<\/p>\n<p><strong>Description:<\/strong> Some may also refer to this very common weed as &#8220;Smartweed.&#8221; The leaves are distinctly pigmented in the centers. This dark green, triangle-shaped splotch was at one time thought to resemble a lady&#8217;s thumbprint; Leaves alternate, opposite, 2-6&#8243; (5-15 cm) long and narrowly or broadly lanceolate, with a fringe of hairs along the cylindrical sheath located at each leaf base. The small, pink or purplish flowers are clustered together in spikes along a single inflorescence. \u00a0(The spike-like racemes are rather stout, erect, and densely crowded with the small flowers.)<strong> [annual]<\/strong><\/p>\n<p><strong>Habitat:<\/strong> Roadsides, damp clearings, cultivated ground;<\/p>\n<p><strong>In Bloom:<\/strong> June &#8211; October<\/p>\n<p><a href=\"https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Ladysthumb-Smartweed-070807.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-1294\" src=\"https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Ladysthumb-Smartweed-070807-300x225.jpg\" alt=\"Photo showing a bunch of the leaves of a smartweed (ladysthumb) plant, with the characteristic dark pigment 'thumbprint' clearly visible at the center of each leaf.\" width=\"300\" height=\"225\" srcset=\"https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Ladysthumb-Smartweed-070807-300x225.jpg 300w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Ladysthumb-Smartweed-070807-768x576.jpg 768w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Ladysthumb-Smartweed-070807-105x79.jpg 105w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Ladysthumb-Smartweed-070807-317x238.jpg 317w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Ladysthumb-Smartweed-070807-423x317.jpg 423w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Ladysthumb-Smartweed-070807-634x476.jpg 634w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Ladysthumb-Smartweed-070807-846x635.jpg 846w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Ladysthumb-Smartweed-070807-500x375.jpg 500w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Ladysthumb-Smartweed-070807.jpg 890w\" sizes=\"auto, (max-width: 320px) 85vw, (max-width: 768px) 67vw, (max-width: 1024px) 62vw,300px\" \/><\/a> <a href=\"https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Smartweed-2002.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-1301\" src=\"https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Smartweed-2002-300x225.jpg\" alt=\"Stem and leaves of a young smartweed (ladysthumb) plant\" width=\"300\" height=\"225\" srcset=\"https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Smartweed-2002-300x225.jpg 300w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Smartweed-2002-105x79.jpg 105w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Smartweed-2002-317x238.jpg 317w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Smartweed-2002-423x317.jpg 423w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Smartweed-2002-634x476.jpg 634w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Smartweed-2002-500x375.jpg 500w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Smartweed-2002.jpg 640w\" sizes=\"auto, (max-width: 320px) 85vw, (max-width: 768px) 67vw, (max-width: 1024px) 62vw,300px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ladysthumb (Lady&#8217;s Thumb) or Smartweed Family: Polygonaceae (Buckwheat or Knotweed Family) Genus: Polygonum (some sources use persicaria for the genus) | Species: persicaria, vulgaris, and\/or caespitosum (Most common member of this group, at least in the northeastern US, is called Pennsylvania Smartweed &#8211; Polygonum Pensylvanicum) Description: Some may also refer to this very common weed [&hellip;]<\/p>\n","protected":false},"author":60,"featured_media":0,"parent":470,"menu_order":20,"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-1291","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ladysthumb \/ Smartweed - Cooperative Extension: Cranberries - 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\/cranberries\/grower-services\/weeds\/ladysthumb-smartweed\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ladysthumb \/ Smartweed - Cooperative Extension: Cranberries - University of Maine Cooperative Extension\" \/>\n<meta property=\"og:description\" content=\"Ladysthumb (Lady&#8217;s Thumb) or Smartweed Family: Polygonaceae (Buckwheat or Knotweed Family) Genus: Polygonum (some sources use persicaria for the genus) | Species: persicaria, vulgaris, and\/or caespitosum (Most common member of this group, at least in the northeastern US, is called Pennsylvania Smartweed &#8211; 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