$4 THE AMERICAN MIDLAND NATURALIST 



Rumex pdtientia L. Patience Dock. 



Manhattan. Noted in two places along the roadside. 

 May 25. 



Rumex en's pits L. Curled Dock. 



Fields, roadsides etc. Common. May 25 (23). 

 Rumex obtusifolius L. Broad-leaved Dock. 



Roadsides. Occasional. June 10. 

 Rumex persicarioides I.. Golden Dock. 



Manhattan. Sandy soil, especially along old river channel. 

 July 15. 



Fagopyrum Fagopyrum (L.) Karst. Buckwheat. 



Cultivated and occasionally escaped. 

 Polygonum emersum (Michx.) Britton. 



Low places, sometimes in dry soil. Frequent. July 25 (23). 

 Polygonum lapathifolium L. 



Fields, riverbanks etc. Common. June 15. 

 Polygonum pennsylvanicum L. 



Fields, riverbanks etc. Common. May 30 (June 2). 

 Polygonum longistylum Small. 



Riverbanks, low roadsides etc. Common. July 20 (19). 

 Polygonum Persicaria L. Ladies' Thumb. 



Low places in fields, roadsides etc. Common. June 5 (5). 

 Polygonum hydropiperoides Michx. 



Manhattan. Once collected in roadside ditch. 

 Polygonum Hydropiper L. Water Pepper. 



Blue Rapids. Once collected along riverbank. 

 Polygonum punctatum Ell. 



Woods and wet places. Common. June 30. 



The name Smartweed is often applied to any of the eight 

 species preceeding, and Knotweed to the five following. 

 Polygonum virginianum L. 



Woods. Occasional. July 30. 

 Polygonum aviculare L. Doorweed. 



Dooryards, roadsides, or other trodden soil. May 25 (24). 

 Polygonum littorale Link. 



Dry roadsides. Common. 

 Polygonum ramosissimuui Michx. Bushy Knotweed. 



Roadsides. Common. July 30. 

 Polygonum tome Michx. Slender Knotweed. 



Blue Rapids. Prairie. 



