422 REPORT OF NEW JERSEY STATE MUSEUM. 



Polygonum pensylvanicum Ij. Pennsylvania Smartweed. 



Polygonum pensylvanicum Linnaeus, Sp. PI. 362. 1753 [Pennsylvania]. — 

 Knieskern 26. — Britton 209. 



Common throughout the State. While a native plant of eastern 

 North America, this is one of those species which have found 

 themselves perfectly adapted for existence in cultivated and 

 waste ground, and has thus become a weed to such an extent 

 that all record of its original habitat and distribution has been 

 lost. It seems useless to cite localities, as it occurs in waste and 

 cultivated ground everywhere, even on the coastal islands. 



Fr. — ^Early August to late Septem'ber or into October. 



Polygonum careyi Olney. Carey's Smartweed. 



Polygonum Careyi Olney, Proc. Prov. Franklin Soc. I. 29. 1847 [Providence, 

 R. I.]. — Willis 52. — Britton 208. — Keller and Brown 130. 



Frequent in sandy swamps of the northern counties and 

 now spreading over the southern half of the State as a weed. 

 Whether originally native within our limits it is impossible to 

 say. 



Pr. — ^iMid-July into September. 



Middle District.— Femherton (C), Browns Mills, Medford (S), Haddon- 

 field, Mickleton. 



Pine Barrens. — Manchester, Winslow (P), Landisville (T), Hammonton 

 (C), Egg Harbor City. 



Coast Strip. — Ocean Grove (P), Toms River (C). 



Polygonum hydropiperoides Michx. Mild Smartweed. 



Polygonum hydropiperoides Michaux, Fl. Bor. Am. I. 239. 1803 [Pennsyl- 

 vania, Virginia and Carolina]. — Britton 209. 



Swamps of the Middle and Coast districts to Cape May; com- 

 mon. Apparently less abundant northward and absent from: the 

 Pine Barrens. 



Fr. — Late July to late September or into October. 



Middle District. — New Egypt, Birmingham, Bear Swamp (S), Ballangers 

 Mills (S), Clementon, Repaupo, Mickleton, Sharpstown, Salem (S). 

 Coast Strip. — Manahawkin, Ocean City, Cold Spring (S). 



Polygonum hydropiperoides opelousanum Riddell. Riddell's Smartweed, 



Polygonum Opelousanum "Riddell" Small, Bull. Torr. Bot. Club XIX. 354. 

 [Opelousas, La.]. 



