Article

We present a new assessment of the exotic flora of continental Portugal, six years after our last study. In 1999, we have assessed 500 exotic species of vascular plants (invasive or more or less naturalised). From 1999 to 2005, 64 new plant species records were added (12.8 % more), attaining a total of 564 taxa (including, as in precedent works, species, subspecies and some hybrids), belonging to 113 families (Almeida & Freitas 2006). At the present time, we have a list of 667 taxa (18.3 % more than at our previous work, and more than 17.9 % of the total number of taxa of the Portuguese flora), included in 124 different families.