Records of alien plants new for the Flora of The Balearic Islands (West-Mediterranean)

Increasing worldwide rates of plant introductions is an environmental issue that makes necessary to continuously update alien checklists. The Balearic Islands (an archipelago located in the Western Mediterranean basin) has been strongly influenced by tourism during the last decades, causing an increase of alien species arrival. After two years of field surveys (2021-2022), here we report and discuss the presence of 12 alien plant species previously unknown for the Balearic archipelago. Species records include the known invasives Tradescantia fluminensis, Cylindropuntia tunicata and Erythrostemon gilliesii. World widespread and of variable invasiveness Salpichroa origanifolia, Portulacaria afra, Buddleja madagascariensis, and less recorded Aloiampelos ciliaris, and Aloe x delaetii, Dracaena draco and Justicia adhatoda. Finally, Euphorbia canariensis and Sedum multiceps, both rarely recorded being these records the second and third observations outside their native range.