456 Bicknell: Ferns and flowering plants of Nantucket 



TiNIARIA DUMETORUM (L.) OpiZ. 



Polygonum Dwnetoriini L. 



Frequent about the borders of thickets mostly in dry open 

 ground, flowering through August and September. 



In the shade of dense thickets in Squani and on Coskaty a 

 delicate very thin-leaved form, simulating Tiniaria cristata (Engelm. 

 & Gray) Small, but with the much larger achenes of P. Diimetoritin 



3.5 mm. long by 2.5 mm. wide. I have collected the same 

 plant on Long Island, New York, and on La Rue Island, Canada, 

 near Alexandria Bay. It is further characterized by very short 

 and few-flowered leafy-bracted racemes or the flowers in merely 

 axillary very small clusters. It contrasts rather strikingly with 

 the common form oi P, Dwnetorum and may even be distinct. 



Fagopyrum Fagopyrum (L.) Karst. 



The buckwheat is mentioned by Mrs. Owen as being common 

 in old fields. It was casually noted on my earliest visit to the 

 island but has not been observed since and would therefore appear 

 to have generally died out. 



Polygonella articulata (L.) Meisn. 



Common throughout, usually in pure sand ; often growing 

 entirely alone, but also mingling with the xerophytic vegetation of 

 the dry commons. Saul's Hills. First flowers, Aug. 9, 1906. 



