{"id":54329,"date":"2023-03-25T04:33:55","date_gmt":"2023-03-25T04:33:55","guid":{"rendered":"https:\/\/inside.ewu.edu\/ewflora\/?p=54329"},"modified":"2025-01-09T17:11:23","modified_gmt":"2025-01-09T17:11:23","slug":"fallopia-japonica","status":"publish","type":"post","link":"https:\/\/inside.ewu.edu\/ewflora\/fallopia-japonica\/","title":{"rendered":"Fallopia\u00a0japonica"},"content":{"rendered":"\n<figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td>Binomial Name<\/td><td><em>Fallopia<\/em>&nbsp;<em>japonica<\/em>&nbsp;(Houtt.) Ronse Decr.<\/td><\/tr><tr><td>Family<\/td><td>Polygonaceae<\/td><\/tr><tr><td>Common Names<\/td><td>Japanese knotweed<\/td><\/tr><tr><td>Eastern Washington<\/td><td>Asian<\/td><\/tr><tr><td>Conservation Status<\/td><td><\/td><\/tr><tr><td>Notes<\/td><td>Very aggressive weed; especially in riparian areas<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<p>Click on any image to enlarge it. <\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-0 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_inf.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"831\" src=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_inf-1024x831.jpg\" alt=\"A photo of Fallopia japonica\" class=\"wp-image-60751\" srcset=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_inf-1024x831.jpg 1024w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_inf-300x244.jpg 300w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_inf-768x623.jpg 768w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_inf.jpg 1232w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Adjacent to homes S of sand bar (&#8220;Island&#8221;) along the Pend Oreille River; 2.6 air mi NNW of the Bridge at Newport, WA; N 48.21822 W 117.06160; Pend Oreille Co.; 9\/27\/2022<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_inf2.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"507\" height=\"1000\" src=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_inf2.jpg\" alt=\"A photo of Fallopia japonica vine\" class=\"wp-image-60750\" srcset=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_inf2.jpg 507w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_inf2-152x300.jpg 152w\" sizes=\"(max-width: 507px) 100vw, 507px\" \/><\/a><figcaption class=\"wp-element-caption\">Adjacent to homes S of sand bar (&#8220;Island&#8221;) along the Pend Oreille River; 2.6 air mi NNW of the Bridge at Newport, WA; N 48.21822 W 117.06160; Pend Oreille Co.; 9\/27\/2022<\/figcaption><\/figure>\n<\/figure>\n<\/div>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_lvs.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"946\" data-id=\"60752\" src=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_lvs-1024x946.jpg\" alt=\"A photo of Fallopia japonica leaves \" class=\"wp-image-60752\" srcset=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_lvs-1024x946.jpg 1024w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_lvs-300x277.jpg 300w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_lvs-768x709.jpg 768w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_lvs.jpg 1083w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Adjacent to homes S of sand bar (&#8220;Island&#8221;) along the Pend Oreille River; 2.6 air mi NNW of the Bridge at Newport, WA; N 48.21822 W 117.06160; Pend Oreille Co.; 9\/27\/2022<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_lvsx.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"873\" data-id=\"60753\" src=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_lvsx-1024x873.jpg\" alt=\"A photo of Fallopia japonica leaves next to a ruler\" class=\"wp-image-60753\" srcset=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_lvsx-1024x873.jpg 1024w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_lvsx-300x256.jpg 300w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_lvsx-768x655.jpg 768w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_lvsx.jpg 1173w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Adjacent to homes S of sand bar (&#8220;Island&#8221;) along the Pend Oreille River; 2.6 air mi NNW of the Bridge at Newport, WA; N 48.21822 W 117.06160; Pend Oreille Co.; 9\/27\/2022<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-3 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_lfvein.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"868\" height=\"1000\" data-id=\"60754\" src=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_lfvein.jpg\" alt=\"A close up photo of Fallopia japonica\" class=\"wp-image-60754\" srcset=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_lfvein.jpg 868w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_lfvein-260x300.jpg 260w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_lfvein-768x885.jpg 768w\" sizes=\"(max-width: 868px) 100vw, 868px\" \/><\/a><figcaption class=\"wp-element-caption\">Adjacent to homes S of sand bar (&#8220;Island&#8221;) along the Pend Oreille River; 2.6 air mi NNW of the Bridge at Newport, WA; N 48.21822 W 117.06160; Pend Oreille Co.; 9\/27\/2022<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_inf3.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"759\" height=\"1000\" data-id=\"60755\" src=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_inf3.jpg\" alt=\"A photo of Fallopia japonica laid out\" class=\"wp-image-60755\" srcset=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_inf3.jpg 759w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_inf3-228x300.jpg 228w\" sizes=\"(max-width: 759px) 100vw, 759px\" \/><\/a><figcaption class=\"wp-element-caption\">Adjacent to homes S of sand bar (&#8220;Island&#8221;) along the Pend Oreille River; 2.6 air mi NNW of the Bridge at Newport, WA; N 48.21822 W 117.06160; Pend Oreille Co.; 9\/27\/2022<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-4 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_flrs.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"701\" height=\"1000\" data-id=\"60756\" src=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_flrs.jpg\" alt=\"A photo of Fallopia japonica leaves\" class=\"wp-image-60756\" srcset=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_flrs.jpg 701w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_flrs-210x300.jpg 210w\" sizes=\"(max-width: 701px) 100vw, 701px\" \/><\/a><figcaption class=\"wp-element-caption\">Adjacent to homes S of sand bar (&#8220;Island&#8221;) along the Pend Oreille River; 2.6 air mi NNW of the Bridge at Newport, WA; N 48.21822 W 117.06160; Pend Oreille Co.; 9\/27\/2022<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_fs.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"696\" height=\"1000\" data-id=\"60757\" src=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_fs.jpg\" alt=\"A photo of Fallopia japonica petal\" class=\"wp-image-60757\" srcset=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_fs.jpg 696w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_fs-209x300.jpg 209w\" sizes=\"(max-width: 696px) 100vw, 696px\" \/><\/a><figcaption class=\"wp-element-caption\">Adjacent to homes S of sand bar (&#8220;Island&#8221;) along the Pend Oreille River; 2.6 air mi NNW of the Bridge at Newport, WA; N 48.21822 W 117.06160; Pend Oreille Co.; 9\/27\/2022<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-5 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_flrcu.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"881\" height=\"1000\" data-id=\"60758\" src=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_flrcu.jpg\" alt=\"An alternate close up photo of Fallopia japonica leaf\" class=\"wp-image-60758\" srcset=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_flrcu.jpg 881w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_flrcu-264x300.jpg 264w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_flrcu-768x872.jpg 768w\" sizes=\"(max-width: 881px) 100vw, 881px\" \/><\/a><figcaption class=\"wp-element-caption\">Adjacent to homes S of sand bar (&#8220;Island&#8221;) along the Pend Oreille River; 2.6 air mi NNW of the Bridge at Newport, WA; N 48.21822 W 117.06160; Pend Oreille Co.; 9\/27\/2022<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_frt.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"790\" data-id=\"60759\" src=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_frt-1024x790.jpg\" alt=\"A photo of Fallopia japonica seed pod\" class=\"wp-image-60759\" srcset=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_frt-1024x790.jpg 1024w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_frt-300x231.jpg 300w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_frt-768x593.jpg 768w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_frt.jpg 1296w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Adjacent to homes S of sand bar (&#8220;Island&#8221;) along the Pend Oreille River; 2.6 air mi NNW of the Bridge at Newport, WA; N 48.21822 W 117.06160; Pend Oreille Co.; 9\/27\/2022<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-6 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_ach.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"852\" height=\"1000\" data-id=\"60760\" src=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_ach.jpg\" alt=\"A photo of Fallopia japonica seed\" class=\"wp-image-60760\" srcset=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_ach.jpg 852w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_ach-256x300.jpg 256w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_ach-768x901.jpg 768w\" sizes=\"(max-width: 852px) 100vw, 852px\" \/><\/a><figcaption class=\"wp-element-caption\">Adjacent to homes S of sand bar (&#8220;Island&#8221;) along the Pend Oreille River; 2.6 air mi NNW of the Bridge at Newport, WA; N 48.21822 W 117.06160; Pend Oreille Co.; 9\/27\/2022<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_ffrtcu.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"754\" height=\"1000\" data-id=\"60761\" src=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_ffrtcu.jpg\" alt=\"A photo of Fallopia japonica seeds on a ruler\" class=\"wp-image-60761\" srcset=\"https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_ffrtcu.jpg 754w, https:\/\/inside.ewu.edu\/ewflora\/wp-content\/uploads\/sites\/275\/2023\/03\/fal_jap1_ffrtcu-226x300.jpg 226w\" sizes=\"(max-width: 754px) 100vw, 754px\" \/><\/a><figcaption class=\"wp-element-caption\">Adjacent to homes S of sand bar (&#8220;Island&#8221;) along the Pend Oreille River; 2.6 air mi NNW of the Bridge at Newport, WA; N 48.21822 W 117.06160; Pend Oreille Co.; 9\/27\/2022<\/figcaption><\/figure>\n<\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Binomial Name Fallopia&nbsp;japonica&nbsp;(Houtt.) Ronse Decr. Family Polygonaceae Common Names Japanese knotweed Eastern Washington Asian Conservation Status Notes Very aggressive weed; especially in riparian areas Click on any image to enlarge it.<\/p>\n","protected":false},"author":16516,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"wpo365_audiences":[],"wpo365_private":false,"footnotes":""},"categories":[665,656],"tags":[5],"class_list":["post-54329","post","type-post","status-publish","format-standard","hentry","category-fallopia","category-polygonaceae","tag-dicot"],"_links":{"self":[{"href":"https:\/\/inside.ewu.edu\/ewflora\/wp-json\/wp\/v2\/posts\/54329"}],"collection":[{"href":"https:\/\/inside.ewu.edu\/ewflora\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/inside.ewu.edu\/ewflora\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/inside.ewu.edu\/ewflora\/wp-json\/wp\/v2\/users\/16516"}],"replies":[{"embeddable":true,"href":"https:\/\/inside.ewu.edu\/ewflora\/wp-json\/wp\/v2\/comments?post=54329"}],"version-history":[{"count":3,"href":"https:\/\/inside.ewu.edu\/ewflora\/wp-json\/wp\/v2\/posts\/54329\/revisions"}],"predecessor-version":[{"id":61406,"href":"https:\/\/inside.ewu.edu\/ewflora\/wp-json\/wp\/v2\/posts\/54329\/revisions\/61406"}],"wp:attachment":[{"href":"https:\/\/inside.ewu.edu\/ewflora\/wp-json\/wp\/v2\/media?parent=54329"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inside.ewu.edu\/ewflora\/wp-json\/wp\/v2\/categories?post=54329"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inside.ewu.edu\/ewflora\/wp-json\/wp\/v2\/tags?post=54329"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}