Polygonum POLYGONAC— CHENOPODIAC. Chenopodium 



P. scandens L. Climbing False Buckwheat. 



Frequent in moist thickets, climbing over shrubs. Frt. late 

 Aug., Sept. 



P. dumetorum L. 



Infrequent; woods, thickets and open ground, 



P. cristatum Engelm. & Gray. 



Infrequent in the Coastal Plain: near Chestertown (QA), E. G. 

 Vanatta, 15 Aug. 1903 (A); pine woods w. of Kiptopeke (No), 

 Fernald, Long & Fogg, 5300, 14 Oct. 1935 (P). 



Associated with P. dumetorum, from which it is distinguished by 

 its dentate calyx-wings. 



P. cuspidatum Sieb. & Zucc. 



Cultivated, and frequently escaping to fencerows and woods. 

 Introd. from Japan. -^' 



P. sachalinense F. Schmidt. Sachaline. 



Occasionally escaping, and rapidly spreading: roadside near 

 Bacon Hill (Ce), Long, 54384, 26 May 1940 (A), and 57004, 13 

 July 1941 (A). 



Tovara Adans. 



T. virginiana (L.) Raf. {Polygonum virginianum L.) Virginia 

 Knotweed. 

 Common in rich woods and thickets, Piedmont and Coastal 

 Plain. Frt. Aug., Sept. 



Fagop3nrum L. 

 F. esculentum Moench. Buckwheat. 



Escaping from cultivation. 



Polygonella Mx. 

 P. articulata (L.) Meisn. 



Dry, sandy soil, preferring the seacoast, but also found inland; 

 frequent in Sussex and Worcester Counties, and occasional in Kent 

 County, Delaware. Fl. and frt. Sept., Oct. 



CHENOPODIACEAE (Goosefoot Family) 



Chenopodium L. Goosefoot. 

 \\ C. ambrosioides L. 



A weed of waste places, beaches, and borders of salt marshes; 

 common throughout. Fl. mid-Aug., Sept. ' (;\^vy \>{^ ,■ 



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