{"id":10961,"date":"2020-11-10T08:58:21","date_gmt":"2020-11-10T08:58:21","guid":{"rendered":"https:\/\/www.northafricatrees.org\/family\/convolvulaceae-juss-3\/"},"modified":"2023-05-23T18:19:12","modified_gmt":"2023-05-23T18:19:12","slug":"convolvulaceae-juss-3","status":"publish","type":"family","link":"https:\/\/www.northafricatrees.org\/fr\/familles\/convolvulaceae-juss-3\/","title":{"rendered":"CONVOLVULACEAE Juss."},"content":{"rendered":"<p>Famille compos\u00e9e de 58 genres et environ 1650 esp\u00e8ces d\u2019arbres (rarement), arbustes, lianes et, plus g\u00e9n\u00e9ralement, plantes herbac\u00e9es, r\u00e9parties dans les r\u00e9gions chaudes et temp\u00e9r\u00e9es de toute la plan\u00e8te. Elle est repr\u00e9sent\u00e9e dans le N. de l\u2019Afrique par 11 genres, mais seuls les arbustes et les arbrisseaux apparaissent dans le genre <strong>Convolvulus<\/strong>.<\/p>\n<p>Les autres convolvulac\u00e9es du N. de l\u2019Afrique pr\u00e9sentant une certaine lignification se trouvent dans le genre Seddera Hochst. Il comprend 8 esp\u00e8ces, dont 2 sont pr\u00e9sentes dans le N de l\u2019Afrique. Il s\u2019agit de petits sous-arbrisseaux qui, lorsqu\u2019ils ne sont pas excessivement abroutis, peuvent d\u00e9passer 0,5 m de haut.<\/p>\n<p><strong>S. latifolia<\/strong> Hochst. &amp; Steud. De jusqu\u2019\u00e0 40(60) cm de haut ; esp\u00e8ce caract\u00e9ris\u00e9e par ses jeunes rameaux et feuilles verd\u00e2tre-blanch\u00e2tre car couvertes de poils longs et courts m\u00e9lang\u00e9s. Feuilles (6-30 \u00d7 2,5-17 mm) elliptiques \u00e0 obov\u00e9es, obtuses ou aigu\u00ebs, parfois apicul\u00e9es au sommet, \u00e0 p\u00e9tiole de 1-5 mm de long. Fleurs axillaires, solitaires ou par paires, subsessiles (p\u00e9dicelle de jusqu\u2019\u00e0 0,5 mm). S\u00e9pales (2,5-5 \u00d7 1-2,5 mm) in\u00e9gaux, elliptiques \u00e0 oblanc\u00e9ol\u00e9s, aigus. Corolle de 4,5-6,5 mm, blanche. Le fruit est une capsule largement ovo\u00efde, poilue, de 2-3 mm de long. Graines de c. 1,5 \u00d7 2 mm. Elle vit dans les zones s\u00e8ches, \u00e0 aire de r\u00e9partition saharo-sindienne, et est pr\u00e9sente dans le N. de l&rsquo;Afrique pour le moins au Sahara occidental, en \u00c9gypte et au Soudan.<\/p>\n<p><strong>S. arabica<\/strong> (Forssk.) Choisy (<em>Cressa arabica<\/em> Forssk.) est un sous-arbrisseau de 20-35(60)\u00a0cm, pubescent, \u00e0 poils \u00e9parses, tiges vieilles lignifi\u00e9es, les jeunes herbac\u00e9es et vertes. Feuilles (0,5-15\u00a0\u00d7\u00a00,3-0,8\u00a0mm) \u00e0 p\u00e9tioles de 1-2\u00a0mm, elliptiques, \u00e0 base arrondie et sommet obtus et mucron\u00e9. Fleurs dispos\u00e9es en cymes \u00e0 1 fleur, \u00e0 p\u00e9doncule de 0,5-2\u00a0cm. S\u00e9pales (3-4\u00a0\u00d7\u00a01,5-2\u00a0mm), ov\u00e9s \u00e0 elliptiques, \u00e0 sommet aigu et base coriace et pubescente. Corolle de 5-6\u00a0mm, blanche. Le fruit est une capsule globuleuse \u00e0 largement ovo\u00efde, glabre. Graines de c. 2\u00a0mm, ovo\u00efdes et noires. L&rsquo;esp\u00e8ce vit dans les for\u00eats et arbustaies des collines rocheuses. Son aire de r\u00e9partition comprend la p\u00e9ninsule arabique et l&rsquo;Afrique tropicale orientale, s&rsquo;\u00e9tendant au N. au travers des r\u00e9gions soudanaises de la mer Rouge, jusqu\u2019au Djebel Elba.<\/p>\n<p>Esp\u00e8ces peu communes mais \u00e0 aire de r\u00e9partition vaste. Aucune de ces esp\u00e8ces n\u2019est actuellement \u00e9valu\u00e9e \u00e0 l\u2019\u00e9chelle mondiale dans la Liste rouge des esp\u00e8ces de l\u2019UICN. Dans le Livre Rouge de la flore vasculaire du Maroc (Fennane, 2021), <em>S. latifolia<\/em> a \u00e9t\u00e9 consid\u00e9r\u00e9e comme Donn\u00e9es insuffisantes (DD). Dans le Liste rouge des plantes vasculaires d\u2019\u00c9gypte (<em>Flora Aegyptiaca <\/em>Vol 1, 2000), <em>S. arabica<\/em> et <em>S. latifolia<\/em> sont catalogu\u00e9es comme \u00ab\u00a0menac\u00e9es\u00a0\u00bb.<\/p>\n","protected":false},"template":"","class_list":["post-10961","family","type-family","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>CONVOLVULACEAE Juss. - 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=\"CONVOLVULACEAE Juss. - North Africa Trees\" \/>\n<meta property=\"og:description\" content=\"Famille compos\u00e9e de 58 genres et environ 1650 esp\u00e8ces d\u2019arbres (rarement), arbustes, lianes et, plus g\u00e9n\u00e9ralement, plantes herbac\u00e9es, r\u00e9parties dans les r\u00e9gions chaudes et temp\u00e9r\u00e9es de toute la plan\u00e8te. Elle est repr\u00e9sent\u00e9e dans le N. de l\u2019Afrique par 11 genres, mais seuls les arbustes et les arbrisseaux apparaissent dans le genre Convolvulus. 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