{"id":12203,"date":"2020-11-10T10:07:34","date_gmt":"2020-11-10T10:07:34","guid":{"rendered":"https:\/\/www.northafricatrees.org\/species\/populus-nigra-l-3\/"},"modified":"2026-07-19T11:03:58","modified_gmt":"2026-07-19T11:03:58","slug":"populus-nigra-l-3","status":"publish","type":"species","link":"https:\/\/www.northafricatrees.org\/fr\/esp\u00e8ce\/populus-nigra-l-3\/","title":{"rendered":"Populus nigra L."},"content":{"rendered":"<p>Arbre caducifoli\u00e9, dio\u00efque, de jusqu\u2019\u00e0 30 m de haut, \u00e0 port plus ou moins r\u00e9gulier, houppier ovo\u00efde (cylindrique chez quelques formes cultiv\u00e9es), \u00e0 rameaux \u00e9tal\u00e9s. Tronc droit de jusqu\u2019\u00e0 1,5 m de diam\u00e8tre, \u00e0 \u00e9corce grise \u00e0 noir\u00e2tre et tr\u00e8s fendill\u00e9e longitudinalement d\u00e8s sa jeunesse ; il pr\u00e9sente parfois sur sa surface de nombreux broussins et une grande quantit\u00e9 de jeunes pousses naissant presque depuis la base. Ramilles glabrescentes, d\u2019abord jaunes puis, apr\u00e8s quelques ann\u00e9es, verd\u00e2tre-gris\u00e2tre \u00e0 ch\u00e2tain clair. Bourgeons \u00e0 4-6 \u00e9cailles, g\u00e9n\u00e9ralement assez visqueuses, glabrescentes. Feuilles (4-10 \u00d7 4-8 cm) alternes, toutes similaires en forme, ov\u00e9es-rhombo\u00efdales ou, plus fr\u00e9quemment, ov\u00e9es-triangulaires, \u00e0 base en forme de coin large, bord cr\u00e9nel\u00e9-dent\u00e9, r\u00e9sineuses et parfois l\u00e9g\u00e8rement pubescentes \u00e0 la naissance, perdant tr\u00e8s rapidement cette viscosit\u00e9 et devenant glabres, de couleur vert plus ou moins fonc\u00e9 sur l&rsquo;endroit, un peu plus clair sur l&rsquo;envers, longuement p\u00e9tiol\u00e9es. Inflorescences en chatons cylindriques, pendants, les m\u00e2les de 3-9 \u00d7 0,8-1,5 cm, sessiles, l\u00e9g\u00e8rement poilus, les femelles de 7-15 \u00d7 0,6-0,9 cm, courtement p\u00e9doncul\u00e9s. Fleurs \u00e0 disque nectarif\u00e8re persistant ; les m\u00e2les \u00e0 6-25(30) \u00e9tamines \u00e0 filets blancs et anth\u00e8res pourpres, les femelles \u00e0 ovaire ovo\u00efde-conique et 2 stigmates jaun\u00e2tres. Le fruit est une petite capsule ellipso\u00efdale de <em>c<\/em>. 8 mm, d\u00e9hiscente en 2 valves qui lib\u00e8rent de nombreuses graines minuscules pourvues de longs poils blanch\u00e2tres. Flottant dans l\u2019atmosph\u00e8re pendant un certain temps, ces poils s\u2019accumulent au sol en tombant, formant des masses cotonneuses caract\u00e9ristiques. 2n = 38.<\/p>\n","protected":false},"featured_media":0,"template":"","class_list":["post-12203","species","type-species","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>Populus nigra 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=\"Populus nigra L. - North Africa Trees\" \/>\n<meta property=\"og:description\" content=\"Arbre caducifoli\u00e9, dio\u00efque, de jusqu\u2019\u00e0 30 m de haut, \u00e0 port plus ou moins r\u00e9gulier, houppier ovo\u00efde (cylindrique chez quelques formes cultiv\u00e9es), \u00e0 rameaux \u00e9tal\u00e9s. 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