76 SANDUSKY FLORA. 



A. reflexum, Bicknell. 



Huron River, Milan, and probably elsewhere. 

 The variety amhiguum also occurs. 



POLYGONACE>E. 



FAGOPYRUH, Qaertn. 



F. esculentum, Moench. Buckwheat. 



Infrequent, except in fields where it has sometime 

 been sown. 



POLYGONUM, L. Knotweed. 

 P. acre, H. B. K. Water Smartweed, 

 Common. 



P. AMPHIBIUM, L.* 



Marblehead ; rare. 

 P. arifolium, L. Halberd-leaved Tear-thumb. 



Bristol's woods, Florence. 

 P. aviculare, L. Knot-grass. Door-weed. 



Abundant. 

 P. careyi, Olney.* 



Southern Perkins. 

 P. convolvulus, L. Black Bindweed. 



Common. 

 P. dumetorum, L. Copse or Hedge Buckwheat. 



Milan, Marblehead. This or P. scandens is 



common and grows on the Islands. 

 P. erectum, L. Erect Knotweed. 



Common. 

 P. hartwrightii Gray.* 



A few plants near L. S. & M. S. freight house. 



Doubtless introduced. 

 P. ■ hydropiper. Smart- weed. Water Pepper. 



Common. 

 P. hydropiperoides, Michx. Mild Water Pepper. 



Infrequent. Kelley's Island. 



