90 NEW, YORK STATE MUSEUM 



Polygonum hydropiper L. 

 Smartweed 

 Ditches and wet places. Common. July- September. 



Polygoimm punctatum Ell. 

 P. acre H. B. K. 

 Water smartweed 

 Shores of the river. Frequent. June-October. 



Polygonum virginianum L. 

 Virginia knotweed 

 Damp thickets. Frequent. July-October. 



Polygonum orientale L. 

 Prince's feather 

 Waste places. Escaped from cultivation. Infrequent. August- 

 September. 



Polygonum aviculare L. 



Door weed. Knotgrass 

 In dooryards and along footpaths. Common. June-November. 



Polygonum erectum L. 

 Erect knotweed 

 Roadsides. Common. July- September. 



Polygonum convolvulus L. 

 Black bindweed 

 Cultivated and waste grounds. Common. July-September. 



Polygonum cilinode Michx. 

 Fringed Mack Mndtveed 

 Infrequent. West of Owego. June- September. 



Polygonum scandens L. 

 C lim h ing fci Ise 5 uckio heat 

 Banks of streams. Common. August-September. 



Polygonum sagittatum L. 

 Arrow-leaved tear-thiinih 

 Swamps and low grounds. Common. July-September. 



Polygonum arifolium L. 

 HaTberd-leaved tear-thuwh 

 Marshes. Frequent. July-September. 



