{"id":11076,"date":"2020-11-10T09:01:14","date_gmt":"2020-11-10T09:01:14","guid":{"rendered":"https:\/\/www.northafricatrees.org\/genus\/santolina-l\/"},"modified":"2026-08-07T17:57:55","modified_gmt":"2026-08-07T17:57:55","slug":"santolina-l","status":"publish","type":"genus","link":"https:\/\/www.northafricatrees.org\/fr\/genres\/santolina-l\/","title":{"rendered":"Santolina L."},"content":{"rendered":"<p>Genre comprenant environ 20 esp\u00e8ces euro-m\u00e9diterran\u00e9ennes, particuli\u00e8rement diversifi\u00e9 dans la p\u00e9ninsule ib\u00e9rique, avec 3 esp\u00e8ces dans le N. de l\u2019Afrique, dont 2 end\u00e9miques (<strong>S. adscensionis<\/strong> et <strong>S. africana<\/strong>) et une autre end\u00e9mique de la p\u00e9ninsule ib\u00e9rique, de Malte et du N.-O. de l\u2019Afrique (<strong>S. pectinata<\/strong>). Bien que leur port soit r\u00e9duit (\u00e0 peine 80\u00a0cm de haut), il s\u2019agit fr\u00e9quemment d\u2019esp\u00e8ces dominantes dans certaines formations v\u00e9g\u00e9tales et caract\u00e9ristiques du paysage.<\/p>\n<p>Genre tr\u00e8s proche, <strong>Pentzia<\/strong> Thunb. est compos\u00e9 de 25 esp\u00e8ces, la plupart des aires arides et d\u00e9sertiques du S. de l\u2019Afrique, dont 2 esp\u00e8ces arbustives dans le N. du continent. <strong>P. monodiana<\/strong> Maire (<em>Tamahaq\u00a0<\/em>: Tehatit), semblable \u00e0 une santoline de par son port et son aspect g\u00e9n\u00e9ral, mais dont les ak\u00e8nes pr\u00e9sentent un pappus en forme de couronne membraneuse liguliforme bien marqu\u00e9e. Il s\u2019agit d\u2019un petit sous-arbrisseau qui atteint 50\u00a0cm de haut, tr\u00e8s ramifi\u00e9, \u00e0 rameaux vieux \u00e0 \u00e9corce sub\u00e9reuse, les jeunes \u00e0 indument blanch\u00e2tre-s\u00e9ric\u00e9, feuilles m\u00e9dianes et sup\u00e9rieures pennatipartites et capitules de <em>c<\/em>. 1\u00a0cm de diam\u00e8tre, solitaires, longuement p\u00e9doncul\u00e9s, \u00e0 bract\u00e9es de l\u2019involucre lin\u00e9aires-lanc\u00e9ol\u00e9es, \u00e0 sommet scarieux blanch\u00e2tre et fleurs toutes flosculeuses, jaune-dor\u00e9. End\u00e9mique du Sahara alg\u00e9rien central, dans les plateaux du Hoggar et du Tassili-n-Ajjer. <strong>P. hesperidum<\/strong> Maire &amp; Wilczek est un petit sous-arbrisseau ligneux d\u2019\u00e0 peine 20\u00a0cm de haut, \u00e0 feuilles charnues, les m\u00e9dianes et sup\u00e9rieures \u00e0 bord denticul\u00e9, et les bract\u00e9es externes de l\u2019involucre ov\u00e9es ou oblongues, \u00e0 sommet scarieux brun p\u00e2le. End\u00e9mique des falaises \u00a0et plaines c\u00f4ti\u00e8res du Sahara marocain.<\/p>\n<p>Genre \u00e9galement proche, <strong>Cladanthus<\/strong> Cass. est form\u00e9 de 5 esp\u00e8ces m\u00e9diterran\u00e9ennes, toutes repr\u00e9sent\u00e9es dans le N. de l\u2019Afrique. Il s\u2019agit de plantes herbac\u00e9es annuelles ou p\u00e9rennes, avec une seule esp\u00e8ces suffrutescente. <strong>C. scariosus<\/strong> (Ball) Oberpr. &amp; Vogt (<em>Santolina scariosa<\/em> Ball, <em>Ormenis scariosa<\/em> (Ball) Litard. &amp; Maire), semblable aux esp\u00e8ces de <em>Santolina<\/em> et <em>Pentzia<\/em> de par son aspect, sa taille (\u00e0 peine 50\u00a0cm de haut) et ses capitules solitaires longuement p\u00e9doncul\u00e9s. N\u00e9anmoins, ce sous-arbrisseau se diff\u00e9rencie nettement par la pr\u00e9sence dans ses capitules de fleurs p\u00e9riph\u00e9riques h\u00e9miligul\u00e9es en plus des flosculeuses. De plus, contrairement \u00e0 <em>Santolina<\/em> et <em>Pentzia<\/em>, ses capitules pr\u00e9sentent des bract\u00e9es interflorales sur le r\u00e9ceptacle. L\u2019esp\u00e8ce est end\u00e9mique du Maroc, et occupe les zones arides des aires montagneuses de basse et moyenne altitude dans l\u2019Anti-Atlas, le Haut-Atlas, le Moyen Atlas et les plateaux du Maroc oriental.<\/p>\n<p>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>P. hesperidum<\/em> a \u00e9t\u00e9 consid\u00e9r\u00e9e comme Vuln\u00e9rable (VU) et <em>C. scariosus<\/em> comme Quasi menac\u00e9e (NT). En Alg\u00e9rie, <em>P. monodiana<\/em> est incluse dans la Liste des esp\u00e8ces v\u00e9g\u00e9tales non cultiv\u00e9es prot\u00e9g\u00e9es (d\u00e9cret ex\u00e9cutif 12-03 du 4 janvier 2012).<\/p>\n","protected":false},"template":"","class_list":["post-11076","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>Santolina 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=\"Santolina L. - North Africa Trees\" \/>\n<meta property=\"og:description\" content=\"Genre comprenant environ 20 esp\u00e8ces euro-m\u00e9diterran\u00e9ennes, particuli\u00e8rement diversifi\u00e9 dans la p\u00e9ninsule ib\u00e9rique, avec 3 esp\u00e8ces dans le N. de l\u2019Afrique, dont 2 end\u00e9miques (S. adscensionis et S. africana) et une autre end\u00e9mique de la p\u00e9ninsule ib\u00e9rique, de Malte et du N.-O. de l\u2019Afrique (S. pectinata). 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