{"id":11136,"date":"2020-11-10T09:01:18","date_gmt":"2020-11-10T09:01:18","guid":{"rendered":"https:\/\/www.northafricatrees.org\/genus\/lycium-l\/"},"modified":"2021-07-25T10:21:55","modified_gmt":"2021-07-25T10:21:55","slug":"lycium-l","status":"publish","type":"genus","link":"https:\/\/www.northafricatrees.org\/fr\/genres\/lycium-l\/","title":{"rendered":"Lycium L."},"content":{"rendered":"<p>Genre form\u00e9 d\u2019environ 88 esp\u00e8ces, principalement r\u00e9parties dans les zones s\u00e8ches voire d\u00e9sertiques du Nouveau Monde, et dont environ 25 sont indig\u00e8nes de l\u2019Afrique. Dans le N. de l\u2019Afrique, ce genre est repr\u00e9sent\u00e9 par 4 esp\u00e8ces autochtones (<strong>L. europaeum<\/strong>, <strong>L. intricatum<\/strong>, <strong>L. shawii<\/strong> et <strong>L. schweinfurthii<\/strong>) et 2 allochtones, qu\u2019il convient de bien diff\u00e9rencier afin de ne pas commettre d\u2019erreurs dans la gestion des \u00e9cosyst\u00e8mes naturels.<\/p>\n<p><em> L. barbarum <\/em>L. (<em>L. halimifolium <\/em>Mill., <em>L. vulgare <\/em>Dunal) est semblable \u00e0 <em>L. Europaeum<\/em> mais se diff\u00e9rencie bien par ses fleurs, \u00e0 \u00e9tamines tr\u00e8s exsertes, qui pr\u00e9sentent en dehors de la corolle une longueur \u00e0 peu pr\u00e8s \u00e9gale \u00e0 la somme de celles des tubes du calice et de la corolle. Corolle \u00e0 lobes bien plus grands, de 3,8-6(7)\u00a0mm, de la m\u00eame taille que le tube de la corolle. Fruits \u00e9galement rouges, mais allong\u00e9s, oblongs (les fameuses baies de goji). Originaire de Chine, elle est cultiv\u00e9e dans les jardins pour ses qualit\u00e9s ornementales, et est pr\u00e9sente sous forme adventice, et semble-t-il naturalis\u00e9e, dans divers secteurs c\u00f4tiers du Maroc, de l&rsquo;Alg\u00e9rie, de la Tunisie et de l&rsquo;\u00c9gypte, p\u00e9ninsule du Sina\u00ef comprise.<\/p>\n<p><em> L. afrum<\/em> L. Il s\u2019agit \u00e9galement d&rsquo;un arbuste \u00e9pineux, de jusqu\u2019\u00e0 2\u00a0m de haut, \u00e0 feuilles sur les tiges et \u00e9pines, dispos\u00e9es en fascicules de 5-12 feuilles, de (11)14-18(24)\u00a0\u00d7\u00a00,8-2\u00a0mm, lin\u00e9aires ou \u00e9troitement oblongues, \u00e0 sommet aigu ou subobtus, crasses, glauques, glabres. Fleurs solitaires, \u00e0 p\u00e9dicelle de 5-10(13)\u00a0mm, dress\u00e9-patent en fleur et r\u00e9fl\u00e9chi en fruit. Calice de 4-6(8)\u00a0\u00d7\u00a04-5\u00a0mm, campanul\u00e9 ou l\u00e9g\u00e8rement tubuleux, \u00e0 5 dents de <em>c<\/em>. 1,5\u00a0mm, sub\u00e9gales, dress\u00e9es, aigu\u00ebs. Corolle \u00e0 p\u00e9tales soud\u00e9s de (13) 15-20\u00a0\u00d7\u00a05-8\u00a0mm, brun fonc\u00e9 ou rouge-violet, infundibuliforme ou tubuleuse, glabre \u00e0 l\u2019ext\u00e9rieur, l\u00e2chement poilue \u00e0 l\u2019int\u00e9rieur, \u00e0 5 lobes de 2-3\u00a0mm, largement ov\u00e9s \u00e0 suborbiculaires, obtus, patents. \u00c9tamines atteignant la bouche de la corolle, ins\u00e9r\u00e9es au niveau de la partie m\u00e9diane du tube de la corolle, \u00e0 7-10\u00a0mm de sa base, \u00e0 filets de 7-8\u00a0mm poilus \u00e0 la base. Style de 12-18\u00a0mm, atteignant la bouche de la corolle. Fruit en baie de 8-13\u00a0\u00d7\u00a08-10\u00a0mm, sph\u00e9rique ou l\u00e9g\u00e8rement ellipso\u00efde, rouge tr\u00e8s fonc\u00e9, presque noire. Graines de 1,5-2\u00a0mm, subdisco\u00efdales \u00e0 ovo\u00efdes. Esp\u00e8ce originaire des zones pluvieuses hivernales de la partie occidentale de l&rsquo;Afrique australe, qui vit sur ar\u00e8nes et dunes sableuses c\u00f4ti\u00e8res et les versants de basse montagne. Elle est cultiv\u00e9e \u00e0 titre ornemental pour ses fleurs, et se trouve donc \u00e9chapp\u00e9e de culture et naturalis\u00e9e dans certaines zones du reste de l\u2019Afrique et du monde.<\/p>\n","protected":false},"template":"","class_list":["post-11136","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>Lycium L. - 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=\"Lycium L. - North Africa Trees\" \/>\n<meta property=\"og:description\" content=\"Genre form\u00e9 d\u2019environ 88 esp\u00e8ces, principalement r\u00e9parties dans les zones s\u00e8ches voire d\u00e9sertiques du Nouveau Monde, et dont environ 25 sont indig\u00e8nes de l\u2019Afrique. 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