Article

In the delicate ecosystem of the islands off the Sardinian coast, it often occurs that some species of plants, which were found in the past, at subsequent visits are no longer found. The author has focused his attention on 18 islands belonging to the 3 main Sardinian archipelagos, where he has taken a census of 131 entities, at one time recorded but later not confirmed by various scientists studying these habitats. These plants, which belong to 42 families and are grouped in 104 genera, are the most representative systematic categories within the Sardinian islands, belong to a floristic tumover, and have a typically Mediterranean biological and chorological spectrum. They include lO endemisms and 9 species listed in the Red Book of Plants in Italy. Furthermore, it has been highlighted that the vulnerability of these environments is inversely proportional to their surface extension and the most threatened habitat is that of typically psammophilous species, followed by the casmophilous and humid habitats.