00 NEW YORK STATE MUSEUM 



Polygonum hydropiper L. 

 Smartweed 

 Ditches and wet i)laces. Common. July- September. 



Polygonum punctatum Ell. 

 P. acre H. B. K. 

 Water smartioeed 

 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. 



Doorireed. 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 black bindtveed 

 infrequent. West of Owego. June- Sep teml)er. 



Polygonum scandens L. 

 Climbing false buckwheat 

 Hanks of streams. Common. August-September. 



Polygonum sagittatum L. 

 Arrow-leaved tear-thumh 

 Swamps and low grounds. Common. July-September. 



Polygonum arifolium T^. 

 Halh erd- leaved tear- 1 h u w b 

 Marshes. Frequent. July-September. 



