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Order 89. POLYGONACEiE.— Buckwheat Family. 



RUMEX. 



Rumex crispus Curled dock. 



Rumex sanguineus Bloody veined dock. 



Rumex Acetosella Sheep sorrel. 



Polygonum. 



Polygonum agnaticum Water persicaria. 



Polygonum Hartwrightii Knotweed. 



Polygonum orientale Prince's feather. 



Polygonum lapathifolium Knotweed. 



Polygonum Hydropipci Common smartweed, or water pepper. 



Polygonum acre Water smartweed. 



Polygonum Virginianum Smooth knotweed. 



Polygonum aviculare Common knotgrass. 



Polygonum erectum Knotgrass. 



Polygonum ant'olium Halbert leaved tear thumb. 



Polygonum sagittatum Arrow leaved tear thumb. 



Polygonum convolvulus Black bindweed. 



Polygonum dumetorum Climbing false buckwheat. 



Polygonum persicaria Lady's thumb. 



Polygonum Pennsylvanicum. 



Fagopyrum. 

 Fagopyrum esculentum Buckwheat. 



Order 91. ARISTOLOCHIACE^:— Birthwort Family. 



ASARUM. 



Asarum Canadense Wild ginger. 



Order 92. PIPERACE^E.— Lizard's Tail Family. 

 Saururus. 

 Saururus cemuus Lizard's tail. 



Order 93. LAURACEiE.— Laurel Family. 

 Sassafras. 



Sassafras officinale Sassafras. 



Lindera. 

 Linden* Benzoin Wild allspice. 



