Additional notes on vegetation of dry openings along the Trent River, Ontario

Additions and corrections are provided for two tables which accompanied a r ecently published description and analysis of dry, open, natural habitats a long the Trent River in the eastern portion of southern Ontario. The vascul ar floras of two additional dry open areas near Crowe Bridge and Campbellfo rd are recorded. The former site is on shallow soil over limestone and incl udes some of the few examples of alvar plant communities that remain undist urbed and relatively rich in native species along the Trent River system. T he latter site is an important addition to the relict limestone savannas th at provide an indication of the natural vegetation that once characterized much of the Trent River system. It is also of phytogeographic interest and includes a rich native flora and rare species.