摘要: Summary The area of S. Rossore is part an old marshy plane, placed on the right side mouth river Arno and reaching Serchio, which untill some centuries ago flowed indipendently into Tirrenian only later has been diversed Arno. On dunes downs a very interesting type Flora survives; its present physionomy going up to Quaternary period, could be preserved till today as since long time private farm park princes, dukes kings. most that downs, expecially oldest ones (pleistocenic) separated historic times, open sea from lagoon Fasana, penetrated just inside walls Pisa. For this reason these have studied with particular care. floristic research based not in study specimens collected by author, but also material author dispose. Th...