135 



553. P. grandidenta, Michx. 



554. P. monolifera, Ait. 



Rather rare. Squaw Is., Niagara R.; near Ft. Erie, Ont., 

 Clinton. 



8S5. P. angulata, Ait. ? 



Found by J. A. Paine, at Braddock's Bay, Lake Ontario, Mon- 

 roe Co., and therefore probably within our territory. 



SS6. P. balsamifera, L. 



Rather rare. Squaw Is., Niagara R. 



The variety candicans, Gray, is common in cultivation, but prob- 

 ably not indigenous here. 



8S7. P. DILATATA, L. 



Common in cultivation and spreading by the root. 



