Distribution of Santolina etrusca (Lacaita) Marchi et D'Amato [Il pattern di distribuzione di Santolina etrusca (Lacaita) Marchi et d'Amato]

The results of bibliographic, herbarium and field studies on the distribution of Santolina etrusca are reported. The species has a disjoint, bipolar distribution with a northern group of populations along the Lima and Arno rivers (Pistoia, Lucca, Florence and Arezzo provinces), known from late nineteenth century herbarium specimens but not confirmed, and a southern group including Mt. Amiata and surrounding areas (centre of dispersal), the Maremma area, the Orcia and Paglia valleis, the Tuscia and a small area near Orvieto (Siena, Grosseto, Viterbo and Terni provinces). The distribution of the species is linked to water courses which are its preferred habitat. © 2018 Società Botanica Italiana onlus.