{"id":13505,"date":"2020-11-10T10:09:20","date_gmt":"2020-11-10T10:09:20","guid":{"rendered":"https:\/\/www.northafricatrees.org\/species\/lactuca-orientalis-boiss-boiss-3\/"},"modified":"2026-04-15T08:02:44","modified_gmt":"2026-04-15T08:02:44","slug":"lactuca-orientalis-boiss-boiss-3","status":"publish","type":"species","link":"https:\/\/www.northafricatrees.org\/fr\/esp\u00e8ce\/lactuca-orientalis-boiss-boiss-3\/","title":{"rendered":"Lactuca orientalis (Boiss.) Boiss."},"content":{"rendered":"

Arbuste laticif\u00e8re, floconneux-cotonneux de jusqu’\u00e0 50(60) cm de haut, \u00e0 ramifications intriqu\u00e9es et extr\u00e9mit\u00e9s des rameaux lignifi\u00e9es et \u00e9pineuses. Feuilles sinu\u00e9es-dent\u00e9es \u00e0 pennatilob\u00e9es, \u00e0 2-4 paires de lobes lat\u00e9raux \u00e9troitement triangulaires ; les inf\u00e9rieurs p\u00e9tiol\u00e9es, formant une rosette basale qui se d\u00e9veloppe en hiver ; les caulinaires plus petites et moins profond\u00e9ment divis\u00e9es, alternes, sessiles, \u00e0 base longuement d\u00e9currente le long de l\u2019entre-n\u0153ud inferieur de la tige. Capitules solitaires, p\u00e9doncul\u00e9s les terminaux et sessiles les lat\u00e9raux, \u00e0 involucre \u00e9troitement cylindrique de 7-10 mm de long \u00e0 la floraison et de jusqu\u2019\u00e0 15 mm \u00e0 la fructification, \u00e0 3-4 rang\u00e9es de bract\u00e9es imbriqu\u00e9es et r\u00e9ceptacle sans \u00e9cailles interflorales. Bract\u00e9es de l\u2019involucre vertes ou l\u00e9g\u00e8rement pourpr\u00e9es ; les plus externes environ six fois plus courtes que les internes, ov\u00e9es et pubescentes \u00e0 la base ; les internes \u00e0 sommet obtus, pubescentes. Capitules \u00e0 4(5) fleurs, jaune p\u00e2le, \u00e0 tube staminal long et de couleur jaune vif. Fruit en ak\u00e8ne de 6-8 \u00d7 1-3 mm, brun\u00e2tre ou pourpre fonc\u00e9, \u00e9troitement ellipso\u00efde, l\u00e9g\u00e8rement comprim\u00e9, \u00e0 5-9 c\u00f4tes de chaque c\u00f4t\u00e9, progressivement r\u00e9tr\u00e9cis au sommet en un pic de 2-3 mm, \u00e0 pappus blanc promptement caduc form\u00e9 de plusieurs rang\u00e9es de poils scabres de 7-9 mm.<\/p>\n","protected":false},"featured_media":0,"template":"","class_list":["post-13505","species","type-species","status-publish","hentry"],"acf":[],"yoast_head":"\nLactuca orientalis (Boiss.) 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