Non-native shrubby species of Euphorbia (Euphorbiaceae) in Tunisia.

Botanical surveys undertaken in several regions of Tunisia (N Africa), mainly around salty wetlands and flats and along railways since 2015, yielded new records of non-native shrubby plants of the genus Euphorbia. These included Euphorbia canariensis, E. cotinifolia subsp. cotinoides, E. cooperi var. cooperi, E. cyathophora, E. milii, E. pulcherrima, E. tirucalli and E. trigona. Among these records, three (E. cotinifolia subsp. cotinoides, E. cooperi var. cooperi, and E. cyathophora) are new for the non-native flora of the Mediterranean area, one for the nonnative flora of the continental Africa (E. canariensis) whereas E. trigona and E. milii var. splendens are first reports to the non-native flora of N Africa. Moreover, Euphorbia pulcherrima is here assigned as first report for the non-native flora of the continental N Africa and E. tirucalli is confirmed as an established taxon and its distributive area is here updated. Distributions and brief morphological descriptions are given for each of these new records. Notes on their habitats and their main distinguishable features together with field photographs are also provided. [ABSTRACT FROM AUTHOR]