{"id":11196,"date":"2020-11-10T09:01:22","date_gmt":"2020-11-10T09:01:22","guid":{"rendered":"https:\/\/www.northafricatrees.org\/genus\/teucrium-l\/"},"modified":"2021-09-08T18:10:51","modified_gmt":"2021-09-08T18:10:51","slug":"teucrium-l","status":"publish","type":"genus","link":"https:\/\/www.northafricatrees.org\/fr\/genres\/teucrium-l\/","title":{"rendered":"Teucrium L."},"content":{"rendered":"<p>Genre comprenant environ 280 esp\u00e8ces \u00e0 aire de r\u00e9partition presque cosmopolite, mais principalement pr\u00e9sentes dans les aires m\u00e9diterran\u00e9ennes. Dans le N. de l\u2019Afrique, il est repr\u00e9sent\u00e9 par 75 esp\u00e8ces, r\u00e9parties en particulier dans l\u2019aire m\u00e9diterran\u00e9enne et les parties les moins arides du Sahara. La plupart sont des plantes annuelles, vivaces ou des sous-arbustes de jusqu\u2019\u00e0 0,5(1) m de haut, certaines \u00e0 base ligneuse mais \u00e0 rameaux herbac\u00e9s. Seule 1 esp\u00e8ce, <strong>T. fruticans<\/strong>, peut parfois \u00eatre consid\u00e9r\u00e9e comme un arbuste, \u00e0 tiges et rameaux ligneux atteignant 1,5(2) m de haut. Autres esp\u00e8ces arbustives, <strong>T. malenconianum<\/strong>, <strong>T. brevifolium<\/strong> et <strong>T. chardonianum<\/strong> pr\u00e9sentent un port plus r\u00e9duit mais encore consid\u00e9rable, pouvant atteindre jusqu\u2019\u00e0 1 m de haut en bonnes conditions.<\/p>\n<p>Petits sous-arbrisseaux \u00e0 souches ligneuses ne d\u00e9passant pas 40 cm de haut : <strong>T. divaricatum<\/strong> Boiss., \u00e0 feuilles p\u00e9tiol\u00e9es coriaces, ov\u00e9es-cun\u00e9iformes, cr\u00e9nel\u00e9es ou incises-cr\u00e9nel\u00e9es, \u00e0 fleurs \u00e0 corolle pourpr\u00e9e, propre de l\u2019E. de la M\u00e9diterran\u00e9e, pr\u00e9sente dans le N. de l\u2019Afrique en Libye (Cyr\u00e9na\u00efque) ; <strong>T. compactum<\/strong> Lag., de la M\u00e9diterran\u00e9e occidentale, \u00e0 feuilles \u00e0 base cun\u00e9iforme, cr\u00e9nel\u00e9es, qui appara\u00eet dans le N. de l\u2019Alg\u00e9rie et de la Tunisie et le N.-O de la Libye ; <strong>T. decaisnei <\/strong>C.Presl [<em>T. pilosum<\/em> (Decne) Asch. &amp; Schweinf., <em>T. sinaicum<\/em> Boiss.], petit arbuste viscide \u00e0 inflorescences solitaires ou r\u00e9unies en groupes de 2-3, des aires d\u00e9sertiques de l\u2019E. de l\u2019\u00c9gypte (Sina\u00ef compris) et de la Libye (Cyr\u00e9na\u00efque) ; et <strong>T. zanonii <\/strong>Pamp., sous-arbuste tr\u00e8s rare, end\u00e9mique de la Libye (Cyr\u00e9na\u00efque), dens\u00e9ment velout\u00e9-tomenteux, \u00e0 rameaux prostr\u00e9s \u00e0 verticillastres dens\u00e9ment dispos\u00e9s en \u00e9pis terminaux, oblongo\u00efdes et courts.<\/p>\n<p>Parmi les esp\u00e8ces non enti\u00e8rement herbac\u00e9es, \u00e0 tiges principales ligneuses, sont dignes de citer : <strong>T. barbarum<\/strong> Jahand. &amp; Maire, arbrisseau \u00e0 rameaux longs et dress\u00e9s de jusqu\u2019\u00e0 1 m de haut, ou parfois sous-arbrisseau rupicole, \u00e0 feuilles subenti\u00e8res ou \u00e0 bord irr\u00e9guli\u00e8rement cr\u00e9nel\u00e9-lobul\u00e9, vertes sur l\u2019endroit et grises sur l\u2019envers, celles des rameaux florif\u00e8res villeuses-tomenteuses sur les deux faces, end\u00e9mique du N. du Maroc (entre le Rif, le Moyen Atlas et l\u2019oc\u00e9an Atlantique) ; <strong>T. bracteatum<\/strong> Desf., sous-arbuste tr\u00e8s hispide \u00e0 feuilles lanc\u00e9ol\u00e9es, end\u00e9mique de l\u2019extr\u00eame N. de l\u2019Alg\u00e9rie et du Maroc (Rif occidental) ; <strong>T. radicans <\/strong>Bonnet &amp; Barratte, sous-arbuste extr\u00eamement rare, end\u00e9mique nord-tunisienne tr\u00e8s localis\u00e9e.<\/p>\n<p>\u00c0 tiges et rameaux principaux indur\u00e9s, plus ou moins lignifi\u00e9s, mais rarement ligneux et mesurant jusqu\u201980 cm de haut. \u00e0 aire de r\u00e9partition plus vaste, mais end\u00e9miques de la r\u00e9gion m\u00e9diterran\u00e9enne : <strong>T. flavum<\/strong> L., <strong>T. scorodonia<\/strong> L. et <strong>T. pseudo-scorodonia<\/strong> Desf. La premi\u00e8re poss\u00e8de des fleurs jaunes et le calice \u00e0 5 dents sub\u00e9gales. Les 2 autres pr\u00e9sentent des fleurs verd\u00e2tre-jaun\u00e2tre et le calice bilabi\u00e9, \u00e0 dent sup\u00e9rieure beaucoup plus longue que les autres. Ces deux derni\u00e8res se distinguent fondamentalement par le calice, celui de <em>T. scorodonia<\/em> \u00e9tant glabrescent, tandis que celui de <em>T. pseudo-scorodonia<\/em> est villeux.<\/p>\n<p>Il s\u2019agit d\u2019esp\u00e8ces g\u00e9n\u00e9ralement communes mais parfois tr\u00e8s menac\u00e9es, du moins localement. Elles ne sont actuellement pas \u00e9valu\u00e9es \u00e0 l\u2019\u00e9chelle mondiale dans la Liste rouge des esp\u00e8ces de l\u2019UICN. Dans le Liste rouge des plantes vasculaires d\u2019\u00c9gypte (<em>Flora Aegyptiaca <\/em>Vol 1, 2000), <em>T. decaisnei<\/em> est catalogu\u00e9e comme \u00ab vuln\u00e9rable \u00bb.<\/p>\n","protected":false},"template":"","class_list":["post-11196","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>Teucrium 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=\"Teucrium L. - North Africa Trees\" \/>\n<meta property=\"og:description\" content=\"Genre comprenant environ 280 esp\u00e8ces \u00e0 aire de r\u00e9partition presque cosmopolite, mais principalement pr\u00e9sentes dans les aires m\u00e9diterran\u00e9ennes. 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