92 



Polygonum avlculare, L. (Knotgrass.) 



A very common weed. (Nat. from Eu.) 

 Polygonum erectum, L. (P. aviculare, var. erectum. Gray's 



Manual.) 



Essex County (Rev. J. L. Russell); Ipswich (J. R.). Scarce. 



Considered an American plant. 

 Polygonum maritimum, L. (Coast Knotgrass.) 



Beverly, Lynn, Ipswich, etc. 

 Polygonum tenue, Miclix. 



Andover, Lawrence, Amesbury, Newbury, Lynn (Tracy), Danvers, 



etc. Frequent. 

 Polygonum arifolium, L. (Halberd-leaved Tear-thumb.) 



Common in damp places. 

 Polygonum sagittatum, L. (Arrow-leaved Tear- thumb.) 



In similar places. Common. 

 Polygonum Convolvulus, L. (Black Bindweed.) 



A climbing weed. (Nat. from Eu.) 

 Polygonum cillnode, Michx. 



Danvers, 1840 (memo. Rev. J. L. Russell), Rockport, Andover 



(Mrs Downs), etc. Not very common. 

 Polygonum dumetorum,. i., var. scandena. (Climbing Ealsb 



Buckwheat.) 



Beverly, West Gloucester, Lynn (Tracy), Manchester (G. D. 



Phippen), etc. Frequent. 



Pagopyrum esculentum, McencJi. (Buckwheat.) 

 Frequent in cultivation, occasionally escaping, Lynn (Tracj"), Dan- 

 vers (J. H. Sears). (Adv. from Eu.) 



Eumex orbieulatus, Gray. (Great Water-Dock.) 



Essex County (Oakes), West Newbury, Swampscott. Scarce. 

 Rumex salicifolius, Weinmann. (White Dock.) 



Nahant (Tracy), Gloucester, Newburyport, etc., near the seashore. 



"First sent by Dr. Nichols from Danvers " (Bigelow's Fl. Bost., 2d 



ed., 1824). 

 Humex crispus, L. (Curled Dock.) . 



A roadside weed. (Nat. from Eu.) 

 Rumex otatusifolius, L. (Bitter Dock.) 



A common weed. (Nat. from Eu.) 

 Rumex Aeetosella, L. (Field or Sheep Sorrel.) 



Another ubiquitous weed. Noticed near Salem (1628) by Hijjginson 



and by some authors considered an American plant. Mr. Phippen 



mentions that strong plants in the garden bear tubers on the roots. 



(Nat. from Eu.) 



