Ageratina adenophora (Sprengel) King & Robinson

Abstract

In Algeria, A. adenophora was considered naturalized as early as in the 1870s (Battandier & Trabut, 1878). In France, it has been cultivated in botanical gardens since the 19th century. It is mentioned in the Villa Thuret garden (Antibes Juan-les-Pins, Sauvagio, 1899), the Monte Carlo garden (Jeannel, 1890), the Montpellier botanical garden (L'Indépendant: journal du Midi, 1848) and the Grenoble botanical garden (Verlot, 1857). It was also probably cultivated in private gardens as it is mentioned in horticultural books with advice on cultivation and maintenance (e.g. Dupuis & Hérincq, 1884). Ageratina adenophora was detected in Corsica in 1952 in Lupino near Bastia. More recent records around 2020 confirmed this expansion trend, with several new locations covering the area between Monaco and Nice (Cap-d'Ail,