424 REPORT OF NEW JERSEY STATE MUSEUM. 



Polygonum setaceum Baldwin. Bristly Smartweed. 



Polygonum setaceum "Baldwin" Elliott, Bot. S. C. and Ga. 1 : 455. 1817 

 [Savannah.] 



Damp ground in the lower part of the Cape May peninsula; 

 locally common. 



First obtained in the State by the writer September 6, 1909, 

 on the borders of a stream east of Cape May Court House. 



Fr. — Late August, probably into October. 

 Cape May. — Court House, Dias Creek. 



Polygonum virginianum L. Virginia Knotweed. 



Polygonum virginianum Linnaeus, Sp. PI. 360. 1753 [Virginia]. — Britten 209. 



Common in woods of the northern counties, south locally 

 in the Middle district and rarely in the Cape May peninsula. 

 Pr. — Early August into October. 



Middle District.— i^cw Egypt, Haddonfield (S), Springdale (S), below 

 Washington Park (S), Mickleton, Swedesboro. 

 Cape May.— Court House (OHB). 



Polygonum aviculare L. Knotgrass. 



Polygonum aviculare Linnaeus, Sp. PI. 362. 1753 [Europe]. — Britton 210. 



Commbn in cultivated and waste ground throughout the State ; 

 although of native origin it has become a typical weed, and cita- 

 tion of localities seems useless. ' 



Fr. — Late August into October. 



Polygonum erectum L. Erect Knotweed. 



Polygonum erectum Linnaeus, Sp. PI. 363. 1753 [Philadelphia]. — Britton 210. 

 Polygonum aviculare var. erectum Knieskern 26. 



Similar in distribution and history to the last species. 

 Fr. — Late August into October. 



Polygonum maritimum L. Seaside Knotweed. 



Polygonu7n maritimum Linnaeus, Sp. PI. 361. 1753 [Italy and Virginia]. — 



Willis 52. — Britton 210. — Keller and Brown 131. 

 Polygonum glaucum Nuttall, Man. L 254. 1818 [Egg Harbor, N. J.]. 



Sands of the sea beaches, but apparently not common. 

 The plant here referred to^ is often whitish and always 

 with silvery sheaths. Other prostrate Polygomims occur along 



