{"id":11592,"date":"2020-11-10T09:01:49","date_gmt":"2020-11-10T09:01:49","guid":{"rendered":"https:\/\/www.northafricatrees.org\/genus\/vachellia-wight-arn\/"},"modified":"2023-03-26T16:20:26","modified_gmt":"2023-03-26T16:20:26","slug":"vachellia-wight-arn","status":"publish","type":"genus","link":"https:\/\/www.northafricatrees.org\/fr\/genres\/vachellia-wight-arn\/","title":{"rendered":"Vachellia Wight &#038; Arn."},"content":{"rendered":"<p>Genre comprenant environ 160 esp\u00e8ces autrefois incluses dans le genre <em>Acacia<\/em>. Il est repr\u00e9sent\u00e9 en Asie, en Australie, en Am\u00e9rique et dans le continent africain, avec un peu plus de 70 esp\u00e8ces pr\u00e9sentes dans ce dernier. Il inclut des arbres et arbustes, \u00e0 fleurs r\u00e9unies en glom\u00e9rules globuleux et feuilles bipenn\u00e9es pourvues de stipules \u00e9pineuses, fr\u00e9quemment \u00e9largies \u00e0 la base. Les caract\u00e8res taxonomiques du genre pr\u00e9sentant une plus grande valeur en termes de diagnostic ont fondamentalement attrait aux feuilles (nombre de pennes et de folioles), \u00e0 la taille des \u00e9pines stipulaires et aux caract\u00e9ristiques des gousses. Quant aux fleurs, tr\u00e8s simples et de faible valeur de diagnostic, elles sont r\u00e9unies en inflorescences glom\u00e9ruliformes et poss\u00e8dent un calice petit et gamos\u00e9pale, campanul\u00e9, \u00e0 5 dents, ainsi qu\u2019une corolle, \u00e9galement petite, \u00e0 5 p\u00e9tales soud\u00e9s \u00e0 la base, oblongs ou ov\u00e9s, glabres ou poilus. Elles sont notables par leurs nombreuses \u00e9tamines, \u00e0 filets longs, blancs, cr\u00e8me, blanch\u00e2tre-jaun\u00e2tre, jaunes ou jaun\u00e2tre-orang\u00e9, qui donnent sa couleur \u00e0 l&rsquo;inflorescence.<\/p>\n<p>En marge des esp\u00e8ces autochtones, sont pr\u00e9sentes dans le N. de l\u2019Afrique <em>V. farnesiana <\/em>et <em>V. karroo<\/em>, qui peuvent ponctuellement appara\u00eetre naturalis\u00e9es. <em>V. farnesiana <\/em>(L.) Wight &amp; Arn., (<em>Mimosa farnesiana <\/em>L.,<em> Acacia farnesiana <\/em>(L.) Willd.) est un arbuste ou arbre caducifoli\u00e9 originaire d\u2019Am\u00e9rique tropicale, aujourd\u2019hui cultiv\u00e9 dans presque tout le N. de l\u2019Afrique. Il poss\u00e8de des feuilles bipenn\u00e9es, \u00e0 2-8 pennes, pourvues chacune de 10-21 paires de folioles de 2-7 \u00d7 0,75-1 mm, et \u00e9pines stipulaires petites, de 0,5-1,5(3) cm. Les fleurs, jaunes, sont r\u00e9unies en capitules glom\u00e9ruliformes de 1-1,5 cm de diam\u00e8tre, et les gousses, de 4-7,5(9) \u00d7 0,8-1,5(2) cm, sont dures et de section subcylindrique. Un esp\u00e8ce tr\u00e8s similaire, <em>V. <\/em><em>karroo <\/em>(Hayne) Banfi &amp; Galasso (<em>A. karroo <\/em>Hayne<em>, A. horrida: auct.), <\/em>indig\u00e8ne d\u2019Afrique australe, est cultiv\u00e9e dans une grande partie du territoire ; elle se diff\u00e9rencie par ses feuilles, qui pr\u00e9sentent un plus grand nombre de pennes [(1)2-7(13) paires] et de folioles [5-15(27) paires par penne, de 1-3(5,5) mm de large], ses \u00e9pines plus grandes, de 0,5-10(25)mm, et ses gousses de (4)6-16(21) \u00d7 0,6-1 cm., comprim\u00e9es et toruleuses.<\/p>\n","protected":false},"template":"","class_list":["post-11592","genus","type-genus","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Vachellia Wight &amp; Arn. - North Africa Trees<\/title>\n<meta name=\"robots\" content=\"noindex, follow\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Vachellia Wight &amp; Arn. - North Africa Trees\" \/>\n<meta property=\"og:description\" content=\"Genre comprenant environ 160 esp\u00e8ces autrefois incluses dans le genre Acacia. Il est repr\u00e9sent\u00e9 en Asie, en Australie, en Am\u00e9rique et dans le continent africain, avec un peu plus de 70 esp\u00e8ces pr\u00e9sentes dans ce dernier. Il inclut des arbres et arbustes, \u00e0 fleurs r\u00e9unies en glom\u00e9rules globuleux et feuilles bipenn\u00e9es pourvues de stipules \u00e9pineuses,...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.northafricatrees.org\/generos\/vachellia-wight-arn-2\/\" \/>\n<meta property=\"og:site_name\" content=\"North Africa Trees\" \/>\n<meta property=\"article:modified_time\" content=\"2023-03-26T16:20:26+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.northafricatrees.org\\\/generos\\\/vachellia-wight-arn-2\\\/\",\"url\":\"https:\\\/\\\/www.northafricatrees.org\\\/generos\\\/vachellia-wight-arn-2\\\/\",\"name\":\"Vachellia Wight & Arn. - North Africa Trees\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.northafricatrees.org\\\/en\\\/#website\"},\"datePublished\":\"2020-11-10T09:01:49+00:00\",\"dateModified\":\"2023-03-26T16:20:26+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.northafricatrees.org\\\/generos\\\/vachellia-wight-arn-2\\\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.northafricatrees.org\\\/generos\\\/vachellia-wight-arn-2\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.northafricatrees.org\\\/generos\\\/vachellia-wight-arn-2\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Portada\",\"item\":\"https:\\\/\\\/www.northafricatrees.org\\\/fr\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Vachellia Wight &#038; Arn.\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.northafricatrees.org\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/www.northafricatrees.org\\\/en\\\/\",\"name\":\"North Africa Trees\",\"description\":\"\u00c1rboles y arbustos aut\u00f3ctonos del Norte de \u00c1frica\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.northafricatrees.org\\\/en\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.northafricatrees.org\\\/en\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.northafricatrees.org\\\/en\\\/#organization\",\"name\":\"North \u00e1frica trees\",\"url\":\"https:\\\/\\\/www.northafricatrees.org\\\/en\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\\\/\\\/www.northafricatrees.org\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.northafricatrees.org\\\/wp-content\\\/uploads\\\/2020\\\/10\\\/logo-north-africa-trees.png\",\"contentUrl\":\"https:\\\/\\\/www.northafricatrees.org\\\/wp-content\\\/uploads\\\/2020\\\/10\\\/logo-north-africa-trees.png\",\"width\":80,\"height\":70,\"caption\":\"North \u00e1frica trees\"},\"image\":{\"@id\":\"https:\\\/\\\/www.northafricatrees.org\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Vachellia Wight & Arn. - North Africa Trees","robots":{"index":"noindex","follow":"follow"},"og_locale":"fr_FR","og_type":"article","og_title":"Vachellia Wight & Arn. - North Africa Trees","og_description":"Genre comprenant environ 160 esp\u00e8ces autrefois incluses dans le genre Acacia. 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