* 



BiCKNELL : Ferns and flowering plants of Nantucket 455 



Persicaria punctata (EU.) Small. 



P. punctata var. leptostachya (Meisner) Small. 



Very common n\ swampy places and along^ wet meadows and 

 pond shores. In full flower through August and September. 



I am unable to see in the so-called var. leptostachya anythhig 

 more than a reduced and slender state of the ordinary plant — and 

 the most common form of the species appears to be more or less 

 intermediate between these two extremes. It does not appear from 

 Elliott's description which form of the plant, if either one, he had 

 particularly in view. 



Persicaria rohustior (Small) comb. wov. 



Pol}'go?unii piinctatum robustior \ius\ Small, Bull. Torrey Club 

 21 : 477. 1894. 



Wet ditch in Quaise; Watt's Run ; muddy ditch north of the 

 town, just in flower, Aug. 15, 1906. Leaves sometimes 15 cm. 

 long by 3.25 cm. wide. 



My experience with this plant, even before it was described, led 

 me to regard it ^s distinct from P. punctata and further acquain- 

 tance with it at many localities has only confirmed this view. Al- 

 though closely related to P, punctata, its characters seem to be very 

 constant and it has a distinctive appearance which announces its 

 identity at sight. It comes into flower definitely later than P. 

 punctata. 



Note, — Polygo?tuin aniphibiuni L. is included m Mrs. Owen's 

 catalogue. What particular plant was intended is now impossible 

 to say unless specimens should be somewhere preserved. I did 

 not myself meet with any species of the ampJiibiuni group. 



Polygonum Zitccarinii Small is planted in the town and shows 

 some tendency to escape from cultivation. 



Tracaulon sagittatum (L.) Small. 



Polygonum sagittal u)n L. 



Common in low grounds, flowering through August and 

 September, 



TiNiARiA Convolvulus (L.) Webb. & Moq. 



Polygonum Convolvulus L, 



Common about cultivated grounds and in waste places. In 

 flower through August and September. 



