{"id":11091,"date":"2020-11-10T09:01:15","date_gmt":"2020-11-10T09:01:15","guid":{"rendered":"https:\/\/www.northafricatrees.org\/genus\/asteriscus-mill\/"},"modified":"2026-08-07T17:24:26","modified_gmt":"2026-08-07T17:24:26","slug":"asteriscus-mill","status":"publish","type":"genus","link":"https:\/\/www.northafricatrees.org\/fr\/genres\/asteriscus-mill\/","title":{"rendered":"Asteriscus Mill."},"content":{"rendered":"<p>Genre constitu\u00e9 de 10 esp\u00e8ces, dont 6 dans le N. de l\u2019Afrique, parmi lesquelles 2 sont herbac\u00e9es et 4 sous-arbustives \u00e0 port r\u00e9duit (jusqu\u2019\u00e0 1,5\u00a0m), propres des zones d\u00e9sertiques et subd\u00e9sertiques. La seule qui puisse \u00eatre consid\u00e9r\u00e9e comme arbustive est <strong>A. pinifolius<\/strong>, les trois autres d\u00e9passant \u00e0 peine 50 cm de hauteur et se diff\u00e9rencient de la pr\u00e9c\u00e9dente par leur caract\u00e8re non glanduleux, elles sont\u00a0:<\/p>\n<p><strong>A<\/strong>.<strong> graveolens<\/strong> (Forssk.) Less [<em>Nauplius graveolens<\/em> (Forssk.) Wiklund] (<em>Ara<\/em>.\u00a0: Negued, robd, rabd, rabi. <em>Tam<\/em>.\/<em>Tamahaq\u00a0<\/em>: Akatkat, hasnem, amio, amayu, tafsat, oukout). La plus amplement r\u00e9partie. Elle se caract\u00e9rise par ses rameaux blanch\u00e2tres, feuilles lin\u00e9aires g\u00e9n\u00e9ralement enti\u00e8res (les m\u00e9dianes et basales \u00e0 quelques dents dispers\u00e9es), verd\u00e2tre-blanch\u00e2tre car en grande partie couvertes de poils blanch\u00e2tre-gris\u00e2tre. Esp\u00e8ce \u00e0 aire de r\u00e9partition saharo-arabique qui, dans le N. de l\u2019Afrique, s\u2019\u00e9tend \u00e0 travers le Sahara de l\u2019Anti-Atlas et des zones basses au Haut Atlas au Maroc, avec quelques peuplements dans la vall\u00e9e du Souss, jusqu\u2019en \u00c9gypte, p\u00e9ninsule du Sina\u00ef comprise. Les 2 autres esp\u00e8ces poss\u00e8dent des feuilles plus larges, succulentes, obovales-spatul\u00e9es, non lin\u00e9aires.<\/p>\n<p><strong> A. imbricatus<\/strong> (Cav.) DC. (<em>Ara.<\/em>: Adrine) se diff\u00e9rencie fondamentalement des esp\u00e8ces pr\u00e9c\u00e9dentes par ses feuilles spatul\u00e9es, \u00e0 bord dent\u00e9-spinuleux, avec des feuilles qui entourent les capitules, oblongues-elliptiques, \u00e0 bord entier. Elle est end\u00e9mique des zones sableuses et pierreuses du Sahara occidental et de l\u2019Anti-Atlas occidental, avec quelques peuplements dans le Maroc atlantique moyen.<\/p>\n<p><strong> A. schultzii <\/strong>(Bolle) Pit. &amp; Proust (<em>Odontospermum schultzii<\/em> Bolle). Elle est l\u2019esp\u00e8ce de plus petite taille, d\u2019\u00e0 peine 15\u00a0cm de haut, \u00e0 feuilles poilues, \u00e0 bord cili\u00e9, capitules floraux \u00e0 fleurs centrales jaunes et fleurs p\u00e9riph\u00e9riques \u00e0 ligules blanches ou blanch\u00e2tre-jaun\u00e2tre. Elle \u00e9tait consid\u00e9r\u00e9e comme end\u00e9mique des \u00eeles Canaries orientales, mais est en r\u00e9alit\u00e9 plus amplement r\u00e9partie dans les provinces s\u00e8ches et subd\u00e9sertiques du continent, \u00e0 proximit\u00e9 des c\u00f4tes, du Sahara occidental jusqu\u2019au Souss.<\/p>\n<p>Tr\u00e8s proche de <em>Asteriscus<\/em>, le genre <strong>Pallensis<\/strong> (Cass.) Cass. s\u2019en diff\u00e9rencie essentiellement par les ak\u00e8nes plats de ses fleurs ligul\u00e9es. Dans le N. de l\u2019Afrique, il est repr\u00e9sent\u00e9 par 6 esp\u00e8ces, toutes \u00e0 aire de r\u00e9partition m\u00e9diterran\u00e9enne et irano-touranienne. Deux d\u2019entre elles pr\u00e9sentent des tiges ligneuses.<\/p>\n<p><strong> P. maritima <\/strong>(L.) Greuter [<em>A. maritimus<\/em> (L.) Less.], est un cham\u00e6phyte d\u00e9combant de jusqu\u2019\u00e0 40 cm de haut, end\u00e9mique de la M\u00e9diterran\u00e9e occidentale. \u00c0 ramification dense et feuilles oblongues-ov\u00e9es ou spatul\u00e9es, elle pr\u00e9sente des capitules sessiles ou tr\u00e8s courtement p\u00e9doncul\u00e9s entour\u00e9s de feuilles involucrales semblables aux caulinaires et inermes, et des fleurs h\u00e9miligul\u00e9es jaune-dor\u00e9 ou jaune citron et des fleurs flosculeuses plus sombres. Ses ak\u00e8nes p\u00e9riph\u00e9riques sont d\u00e9pourvus d\u2019ailes. Elle appara\u00eet dans les falaises et formations rocheuses littorales et de l\u2019int\u00e9rieur, au Maroc, en Alg\u00e9rie et en Tunisie.<\/p>\n<p><strong> P. teknensis<\/strong> (Dobignard &amp; Jacquemoud) Greuter &amp; Jury, end\u00e9mique du S.-O. du Maroc, se diff\u00e9rencie fondamentalement de la pr\u00e9c\u00e9dente par ses ak\u00e8nes p\u00e9riph\u00e9riques largement ail\u00e9s.<\/p>\n<p>Elles ne sont actuellement pas \u00e9valu\u00e9es \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>A. graveolens<\/em> a \u00e9t\u00e9 consid\u00e9r\u00e9e comme Pr\u00e9occupation mineure (LC), <em>A. imbricatus<\/em> et <em>A. schultzii<\/em> comme Quasi menac\u00e9es (NT).<\/p>\n","protected":false},"template":"","class_list":["post-11091","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>Asteriscus Mill. - 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=\"Asteriscus Mill. - North Africa Trees\" \/>\n<meta property=\"og:description\" content=\"Genre constitu\u00e9 de 10 esp\u00e8ces, dont 6 dans le N. de l\u2019Afrique, parmi lesquelles 2 sont herbac\u00e9es et 4 sous-arbustives \u00e0 port r\u00e9duit (jusqu\u2019\u00e0 1,5\u00a0m), propres des zones d\u00e9sertiques et subd\u00e9sertiques. 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