{"id":21152,"date":"2025-10-16T09:09:11","date_gmt":"2025-10-16T12:09:11","guid":{"rendered":"https:\/\/www.naturenb.ca\/?p=21152"},"modified":"2026-02-16T12:03:46","modified_gmt":"2026-02-16T16:03:46","slug":"la-verveine-bleue-une-incroyable-fleur-indigene","status":"publish","type":"post","link":"https:\/\/www.naturenb.ca\/fr\/2025\/10\/16\/la-verveine-bleue-une-incroyable-fleur-indigene\/","title":{"rendered":"La verveine bleue, une incroyable fleur indig\u00e8ne"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">La verveine bleue, une incroyable fleur indig\u00e8ne<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.naturenb.ca\/sites\/www.naturenb.ca\/wp-content\/uploads\/2025\/10\/IMG_2068-1024x768.jpg\" alt=\"\" class=\"wp-image-21145\" srcset=\"https:\/\/www.naturenb.ca\/sites\/www.naturenb.ca\/wp-content\/uploads\/2025\/10\/IMG_2068-1024x768.jpg 1024w, https:\/\/www.naturenb.ca\/sites\/www.naturenb.ca\/wp-content\/uploads\/2025\/10\/IMG_2068-300x225.jpg 300w, https:\/\/www.naturenb.ca\/sites\/www.naturenb.ca\/wp-content\/uploads\/2025\/10\/IMG_2068-768x576.jpg 768w, https:\/\/www.naturenb.ca\/sites\/www.naturenb.ca\/wp-content\/uploads\/2025\/10\/IMG_2068-1536x1152.jpg 1536w, https:\/\/www.naturenb.ca\/sites\/www.naturenb.ca\/wp-content\/uploads\/2025\/10\/IMG_2068.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><em><strong>Ce blogue invit\u00e9 fait partie d\u2019une s\u00e9rie d\u2019articles r\u00e9dig\u00e9s par des \u00e9tudiants de l\u2019Universit\u00e9 Mount Allison, dans le cadre d\u2019un\u00a0<a href=\"https:\/\/www.naturenb.ca\/fr\/2025\/05\/28\/un-jardin-pour-les-pollinisateurs-et-un-partenariat-fructueux-avec-luniversite-mount-allison\/?lang=fr\">partenariat entre Nature NB et le cours sur la conservation appliqu\u00e9e des plantes indig\u00e8nes et des pollinisateurs.<\/a>\u00a0Merci \u00e0 la Dre Emily Austen et aux \u00e9tudiants pour cette collaboration continue!<\/strong><\/em><br><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Par Keeghan Stephens, \u00e9tudiant \u00e0 l&#8217;Universit\u00e9 Mount Allison<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les fleurs sauvages indig\u00e8nes sont les plantes \u00e0 fleurs qui poussent naturellement dans notre environnement. Ces plantes ont \u00e9volu\u00e9 et se sont d\u00e9velopp\u00e9es aux c\u00f4t\u00e9s d&#8217;autres plantes et animaux, tels que les pollinisateurs, perfectionnant ainsi un \u00e9quilibre fragile qui a contribu\u00e9 au bon fonctionnement de l&#8217;\u00e9cosyst\u00e8me. La verveine hast\u00e9e, ou verveine bleue, est l&#8217;une de ces fleurs sauvages indig\u00e8nes (<em>Verbena hastata<\/em>).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vous connaissez peut-\u00eatre ces tiges surmont\u00e9es de fleurs violettes, que vous avez aper\u00e7ues en passant devant elles dans les foss\u00e9s au bord de la route ou lors de promenades nocturnes dans les zones humides et les prairies. La verveine bleue joue un r\u00f4le important dans notre \u00e9cosyst\u00e8me en tant que halte populaire pour les pollinisateurs comme les abeilles et en tant que solution provisoire pour les \u00e9missions de m\u00e9thane dans les zones humides.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La verveine bleue est une fleur sauvage vivace et r\u00e9sistante, originaire de r\u00e9gions couvrant toute l&#8217;Am\u00e9rique du Nord. Au Nouveau-Brunswick, elle fleurit de juillet \u00e0 septembre et atteint une hauteur impressionnante de cinq pieds. En tant que fleur des zones humides, elle prosp\u00e8re dans les sols humides et \u00e0 ciel ouvert. La verveine bleue pr\u00e9sente un large \u00e9ventail d&#8217;interactions avec d&#8217;autres organismes de son environnement, pollinisateurs ou non. Ses graines sont la proie d&#8217;oiseaux tels que les cardinaux et les juncos, qui les dispersent dans le paysage. Il est important de noter que la verveine bleue est une destination pris\u00e9e de nombreux pollinisateurs, tels que les abeilles, dont les populations sont en d\u00e9clin \u00e0 l&#8217;\u00e9chelle mondiale.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Planter des fleurs sauvages est une fa\u00e7on amusante et efficace de contribuer \u00e0 soutenir les populations de pollinisateurs. Lorsque vous produisez des m\u00e9langes de semences \u00e0 planter sur votre terrain, la verveine bleue devrait figurer parmi vos priorit\u00e9s. D&#8217;autres recherches sur cette plante ont montr\u00e9 qu&#8217;elle \u00e9tait l&#8217;une des plantes les plus fr\u00e9quemment visit\u00e9es par les abeilles indig\u00e8nes dans un champ de fleurs sauvages (Abbate et al. 2024). L&#8217;\u00e9tude souligne l&#8217;int\u00e9r\u00eat d&#8217;utiliser l&#8217;attrait de cette fleur pour attirer davantage de pollinisateurs g\u00e9n\u00e9ralistes dans les champs de fleurs. En attirant davantage de pollinisateurs g\u00e9n\u00e9ralistes dans le champ, la verveine bleue garantit que les autres plantes du champ sont pollinis\u00e9es \u00e0 un rythme plus \u00e9lev\u00e9, ce qui favorise les esp\u00e8ces de pollinisateurs sp\u00e9cialis\u00e9s qui pourraient ne d\u00e9pendre que d&#8217;une seule plante dans ledit champ. Cela signifie \u00e9galement que si une population de pollinisateurs conna\u00eet une mauvaise ann\u00e9e, d&#8217;autres sont l\u00e0 pour prendre le relais.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour en savoir plus sur la plantation et l&#8217;entretien de la verveine bleue, consultez les sources suivantes (en anglais) :<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.gardeningknowhow.com\/ornamental\/flowers\/blue-vervain\/growing-blue-vervain-plants.htm\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Blue Vervain Cultivation: Tips On Growing Blue Vervain Plants<\/strong><\/a><strong>, <\/strong><a href=\"https:\/\/www.westernnativeseed.com\/plant%2520guides\/verhaspg.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Blue Vervain (Verbena Hastata) Plant Fact Sheet<\/strong><\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Au-del\u00e0 de ses avantages pour les pollinisateurs, la verveine bleue peut \u00e9galement jouer un r\u00f4le dans la lutte contre le changement climatique. Les zones humides o\u00f9 pousse la verveine bleue sont des puits de m\u00e9thane, qui emprisonnent le gaz sous des couches de boue \u00e9paisse. Le m\u00e9thane est un gaz \u00e0 effet de serre dont le pouvoir de r\u00e9tention de la chaleur est 28 fois sup\u00e9rieur \u00e0 celui du dioxyde de carbone. Les zones humides sont responsables d&#8217;un tiers des \u00e9missions mondiales de m\u00e9thane. Selon la Convention de Ramsar sur les zones humides, 64 % des zones humides mondiales ont disparu, et d&#8217;autres sont d\u00e9grad\u00e9es ; ces zones humides d\u00e9grad\u00e9es et disparues sont en outre responsables d&#8217;une quantit\u00e9 disproportionn\u00e9e d&#8217;\u00e9missions de m\u00e9thane (Ramsar, 2018 ; Evans &amp; Gauci, 2023). Les zones humides intactes et restaur\u00e9es abritent g\u00e9n\u00e9ralement des plantes qui limitent les \u00e9missions de m\u00e9thane, mais les zones humides endommag\u00e9es par les plantes envahissantes et le d\u00e9veloppement peuvent compter moins de plantes indig\u00e8nes pour remplir ce r\u00f4le et produire davantage d&#8217;\u00e9missions. La verveine bleue semble jouer ce r\u00f4le de plante tampon, ne lib\u00e9rant pas de m\u00e9thane (Kao-Kniffin et al. 2010). La restauration de la dynamique naturelle de nos zones humides par la plantation de flore indig\u00e8ne, y compris de plantes tampons comme la verveine bleue, peut r\u00e9duire les \u00e9missions et contribuer \u00e0 ralentir le changement climatique (Evans &amp; Gauci, 2023).<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<figure class=\"wp-block-image alignright size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"960\" src=\"https:\/\/www.naturenb.ca\/sites\/www.naturenb.ca\/wp-content\/uploads\/2025\/10\/image.png\" alt=\"\" class=\"wp-image-21132\" srcset=\"https:\/\/www.naturenb.ca\/sites\/www.naturenb.ca\/wp-content\/uploads\/2025\/10\/image.png 720w, https:\/\/www.naturenb.ca\/sites\/www.naturenb.ca\/wp-content\/uploads\/2025\/10\/image-225x300.png 225w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\"><em>Verbena hastata de iNaturalist, par Kent McFarland<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<p class=\"wp-block-paragraph\">La verveine bleue est une plante vraiment remarquable. Non seulement est-elle magnifique, mais elle contribue \u00e9galement de mani\u00e8re significative au bien-\u00eatre de nos \u00e9cosyst\u00e8mes. Elle favorise notamment la pollinisation des fleurs sauvages locales et r\u00e9duit les \u00e9missions de m\u00e9thane dans les zones humides. Il est facile de se concentrer sur ces organismes exceptionnels. Cependant, toutes les fleurs sauvages m\u00e9ritent d&#8217;\u00eatre appr\u00e9ci\u00e9es. Qu&#8217;elles aient des fleurs impressionnantes, qu&#8217;elles jouent un r\u00f4le d\u00e9mesur\u00e9 dans l&#8217;\u00e9cosyst\u00e8me ou qu&#8217;elles n&#8217;aient aucune de ces caract\u00e9ristiques, il est bon de se rappeler que ces organismes ont tous leur place dans le r\u00e9seau complexe de nos \u00e9cosyst\u00e8mes.<\/p>\n<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><em><strong>Rejoignez le <a href=\"https:\/\/www.naturenb.ca\/fr\/club-gardiens-des-semences\/?lang=fr\">club Gardien\u00b7nes des semences<\/a> pour recevoir une infolettre de Nature NB consacr\u00e9e \u00e0 la culture des plantes indig\u00e8nes !<\/strong><\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Sources<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>75% of Earth\u2019s land areas are degraded; wetlands have been hit hardest, with 87% lost globally in the last 300 years | The Convention on Wetlands, The Convention on Wetlands<\/em>. (n.d.). Retrieved October 24, 2024, from <a href=\"https:\/\/www.ramsar.org\/news\/75-earths-land-areas-are-degraded-wetlands-have-been-hit-hardest-87-lost-globally-last-300\">https:\/\/www.ramsar.org\/news\/75-earths-land-areas-are-degraded-wetlands-have-been-hit-hardest-87-lost-globally-last-300<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Abbate, A. P., Campbell, J. W., Grodsky, S. M., &amp; Williams, G. R. (2024). Assessing the attractiveness of native wildflower species to bees (Hymenoptera: Anthophila) in the southeastern United States. <em>Ecological Solutions and Evidence<\/em>, <em>5<\/em>(3), e12363.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Evans, C., Gacui, V., (2023) Wetlands and Methane Technical Paper (Wetlands International)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Features, M. H. D. last updated in. (2014, November 8). <em>Blue Vervain Cultivation: Tips On Growing Blue Vervain Plants<\/em>. Gardeningknowhow.<a href=\"https:\/\/www.gardeningknowhow.com\/ornamental\/flowers\/blue-vervain\/growing-blue-vervain-plants.htm\"> https:\/\/www.gardeningknowhow.com\/ornamental\/flowers\/blue-vervain\/growing-blue-vervain-plants.htm<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kao-Kniffin, J., Freyre, D. S., &amp; Balser, T. C. (2010). Methane dynamics across wetland plant species. <em>Aquatic Botany<\/em>, <em>93<\/em>(2), 107-113.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kirk, S., Belt, S., &amp; Berg, N. A. (2011, February). <em>Blue Vervain Plant Fact Sheet<\/em>. Western Native Seed. https:\/\/www.westernnativeseed.com\/plant%20guides\/verhaspg.pdf&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Plant database<\/em>. Lady Bird Johnson Wildflower Center &#8211; The University of Texas at Austin. (n.d.). https:\/\/www.wildflower.org\/plants\/result.php?id_plant=VEHA2&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ulyshen, M., &amp; Horn, S. (2023). Declines of bees and butterflies over 15 years in a forested landscape. <em>Current Biology<\/em>, <em>33<\/em>(7). https:\/\/doi.org\/10.1016\/j.cub.2023.02.030&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Van Drunen, S. G., Linton, J. E., Kuwahara, G., &amp; Ryan Norris, D. (2022). Flower plantings promote insect pollinator abundance and wild bee richness in Canadian agricultural landscapes. Journal of Insect Conservation, 26(3), 375-386.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La verveine bleue, une incroyable fleur indig\u00e8ne Ce blogue invit\u00e9 fait partie d\u2019une s\u00e9rie d\u2019articles r\u00e9dig\u00e9s par des \u00e9tudiants de l\u2019Universit\u00e9 Mount Allison, dans le cadre d\u2019un\u00a0partenariat entre Nature NB [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":21146,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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