Conservation of Ptilostemon greuteri (Asteraceae), an endemic climate relict from Sicily (Italy): State of knowledge after the discovery of a second population

Ptilostemon greuteri is one of the most endangered and poorly studied woody vascular plant species Mediterranean Basin, endemic to Sicily (Italy). Several peculiar traits confer P. a character uniqueness an enigmatic attractiveness. In fact, at first glimpse largest individuals this remind remarkable cases herbaceous genera (e.g., Echium, Senecio) turned on insular or insular-like mountain ecosystems. Following discovery second population rare species, project aiming study conservation was set up. We present here updated information distribution, status, biology ecological requirements species. Field surveys supported by drone imagery were carried out estimate current range two populations. The data obtained allowed refine status assessment update distribution pattern means detailed digital maps each population. Ongoing field investigations currently provide valuable about point impact wildfires size structure. Our research has also highlighted several knowledge gaps that need be filled apply more effective measures. Preliminary results suggest local topographic mesoclimatic factors (air humidity shade) are key variables explaining persistency survival in area.