{"id":10940,"date":"2020-11-10T08:58:20","date_gmt":"2020-11-10T08:58:20","guid":{"rendered":"https:\/\/www.northafricatrees.org\/family\/boraginaceae-juss-3\/"},"modified":"2026-06-12T20:10:57","modified_gmt":"2026-06-12T20:10:57","slug":"boraginaceae-juss-3","status":"publish","type":"family","link":"https:\/\/www.northafricatrees.org\/fr\/familles\/boraginaceae-juss-3\/","title":{"rendered":"BORAGINACEAE Juss."},"content":{"rendered":"<p>Famille compos\u00e9e de 153 genres et environ 2000 esp\u00e8ces d\u2019arbres, arbustes, lianes (rarement) et plantes herbac\u00e9es, \u00e0 aire de r\u00e9partition quasiment cosmopolite, mais dot\u00e9e d\u2019une repr\u00e9sentation importante sous les tropiques et dans les r\u00e9gions irano-touranienne et m\u00e9diterran\u00e9enne. Dans les r\u00e9gions temp\u00e9r\u00e9es, les divers genres sont compos\u00e9s d\u2019esp\u00e8ces annuelles ou herbac\u00e9es p\u00e9rennes. Dans les zones tropicales apparaissent des arbres et arbustes. Dans le N. de l\u2019Afrique, \u00e0 la transition entre les mondes m\u00e9diterran\u00e9en et tropical, apparaissent quelques arbres, arbustes et plantes p\u00e9rennes \u00e0 tiges plus ou moins ligneuses (dans les genres <strong>Cordia<\/strong>,<strong> Euploca<\/strong>,<strong> Trichodesma, <span class=\"HwtZe\" lang=\"fr\"><span class=\"jCAhz ChMk0b\"><span class=\"ryNqvb\">Lithodora <\/span><\/span><\/span> <\/strong>et <strong>Echiochilon<\/strong>).<\/p>\n<p>Le genre <strong>Euploca<\/strong> Nutt., compos\u00e9 en grande partie d\u2019esp\u00e8ces herbac\u00e9es, pr\u00e9sente une esp\u00e8ce ligneuse, <strong>E. rariflora <\/strong>(Stocks) Diane &amp; Hilger (<em>Heliotropium rariflorum<\/em> Stocks), de jusqu\u2019\u00e0 0,5(0,8) m de haut, \u00e0 rameaux dress\u00e9s, gris\u00e2tres, les plus \u00e2g\u00e9s couverts d\u2019une \u00e9corce blanch\u00e2tre-argent\u00e9 qui se d\u00e9tache en lani\u00e8res, laissant appara\u00eetre une \u00e9corce brun fonc\u00e9, presque noire, qui se d\u00e9tache \u00e9galement. Ramilles jeunes vertes \u00e0 poils blancs appliqu\u00e9es. Feuilles de 7-25 (35) \u00d7 1-5 mm, lin\u00e9aires ou lin\u00e9aires-lanc\u00e9ol\u00e9es, \u00e0 bord un peu r\u00e9volut\u00e9 et couvertes de poils blancs appliqu\u00e9s et \u00e9parses (se touchant \u00e0 peine), \u00e0 p\u00e9tiole de <em>c<\/em> 2 mm. Inflorescences peu denses, spiciformes, \u00e0 poils blancs appliqu\u00e9s, fleurs pentam\u00e8res, calice \u00e0 lobes sub\u00e9gaux, lanc\u00e9ol\u00e9s, corolle de 2,4-3 mm, blanche ou verd\u00e2tre-jaun\u00e2tre. Nucule subglobuleuse, couverte de poils dress\u00e9s. Son aire de r\u00e9partition est principalement saharo-sindienne, du Sahara atlantique au N.-O. de l\u2019Inde, s\u2019\u00e9tendant au S.-E. jusqu\u2019en Tanzanie. Dans le N. de l\u2019Afrique : Sahara occidental, m\u00e9ridional et occidental.<\/p>\n<p><span class=\"HwtZe\" lang=\"fr\"><span class=\"jCAhz ChMk0b\"><span class=\"ryNqvb\"><strong>Lithodora<\/strong> Griseb.<\/span><\/span> <span class=\"jCAhz ChMk0b\"><span class=\"ryNqvb\">est un genre ne comprenant que trois esp\u00e8ces d&rsquo;arbrisseaux m\u00e9diterran\u00e9ens, dont deux sont pr\u00e9sentes en Afrique du Nord.<\/span><\/span> <span class=\"jCAhz ChMk0b\"><span class=\"ryNqvb\">Elles se caract\u00e9risent par leur \u00e9corce blanch\u00e2tre qui se fissure pour r\u00e9v\u00e9ler un int\u00e9rieur sombre, leurs rameaux et leurs feuilles parsem\u00e9s de poils blancs (laissant appara\u00eetre le vert du feuillage), leurs feuilles lanc\u00e9ol\u00e9es, l\u00e9g\u00e8rement charnues, de 0,5 \u00e0 1,5 cm de long, et leurs fleurs sym\u00e9triques, actinomorphes, en forme d&rsquo;entonnoir, d&rsquo;un bleu-pourpre fonc\u00e9.<\/span><\/span> <span class=\"jCAhz\"><span class=\"ryNqvb\"><strong>L. fruticosa<\/strong> (L.) Griseb.<\/span><\/span> <span class=\"jCAhz ChMk0b\"><span class=\"ryNqvb\">est originaire de la M\u00e9diterran\u00e9e occidentale (France, Espagne, Maroc et Alg\u00e9rie), tandis que <strong>L. hispidula<\/strong> (Sm.) Griseb., similaire, se trouve dans la partie orientale (Anatolie, Syrie, Libye et plusieurs \u00eeles comme la Cr\u00e8te et Chypre).<\/span><\/span> <span class=\"jCAhz ChMk0b\"><span class=\"ryNqvb\">La population libyenne a \u00e9t\u00e9 diff\u00e9renci\u00e9e comme <strong>L. hispidula<\/strong> subsp.<\/span><\/span> <span class=\"jCAhz ChMk0b\"><span class=\"ryNqvb\"><strong>cyrenaica<\/strong> (Pamp.) Brullo &amp; Furnari, end\u00e9mique du Jbel Akhdar.<\/span><\/span><\/span><\/p>\n<p>Appartiennent \u00e9galement \u00e0 cette famille les arbrisseaux du genre <strong>Echiochilon <\/strong>Desf., \u00e0 tiges et rameaux ligneux, mais qui atteignent \u00e0 peine 40(50) cm de haut. Ils pr\u00e9sentent une \u00e9corce blanch\u00e2tre qui se fendille et se d\u00e9tache en plaques longitudinales, des ramilles et feuilles \u00e0 poils blancs \u00e9parses (laissant apercevoir nettement la couleur verte de la feuille), lanc\u00e9ol\u00e9es \u00e0 oblongues, charnues, de 0,5-1,5 cm. Les esp\u00e8ces nord-africaines \u00e0 tiges les plus lignifi\u00e9es sont les suivantes : <strong>E. fruticosum <\/strong>Desf. (<em>Ara.<\/em> (\u00c9gypte) : Kahla) est l\u2019esp\u00e8ce la plus amplement r\u00e9pandue au Sahara, de l\u2019Atlantique \u00e0 la mer Rouge, et se diff\u00e9rencie par sa corolle poilue sur sa face externe ; <strong>E. chazaliei<\/strong> (Cham.) I.M. Johnst., du Sahara occidental (de la Mauritanie au S. du Maroc) pr\u00e9sente une corolle glabre sur sa face externe ; <strong>E. simonneaui <\/strong>Dubuis &amp; Faurel, end\u00e9mique du Sahara occidental (Seguia el-Hamra), poss\u00e8de des feuilles lanc\u00e9ol\u00e9es \u00e0 poils pr\u00e9sents uniquement sur les bords et corolle glabre sur sa face externe ; enfin, <strong>E. kotschyi <\/strong>(Boiss. &amp; Hohen.) I.M. Johnst., qui se diff\u00e9rencie par ses p\u00e9tales blancs \u00e0 base jaun\u00e2tre, vit dans la p\u00e9ninsule arabique et en Iran, \u00e9galement cit\u00e9e en Libye.<\/p>\n","protected":false},"template":"","class_list":["post-10940","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>BORAGINACEAE 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=\"BORAGINACEAE Juss. - North Africa Trees\" \/>\n<meta property=\"og:description\" content=\"Famille compos\u00e9e de 153 genres et environ 2000 esp\u00e8ces d\u2019arbres, arbustes, lianes (rarement) et plantes herbac\u00e9es, \u00e0 aire de r\u00e9partition quasiment cosmopolite, mais dot\u00e9e d\u2019une repr\u00e9sentation importante sous les tropiques et dans les r\u00e9gions irano-touranienne et m\u00e9diterran\u00e9enne. Dans les r\u00e9gions temp\u00e9r\u00e9es, les divers genres sont compos\u00e9s d\u2019esp\u00e8ces annuelles ou herbac\u00e9es p\u00e9rennes. 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