Ambrosia COMPOSITAE Rudheckia 



w A. artemisiifolia L. var. elatior (L.) Descourtils. See Rhodora 37, 

 184-185. 1935. Low Ragweed. 



Common weed, in waste ground, woods, brackish marshes and 

 dune hollows, Piedmont, and Coastal Plain southward to Accomac 

 County. Aug., Sept. 



Xanthium L. Cocklebur. 

 Compare Cronquist: Rhodora 47, 403. 1945. 



X. spinosum L. 



Occasional in waste ground. New Castle County: Wilmington, 

 Commons, Sept. 1865 (A) ; Delaware City, Commons, 21 June 1897, 

 (A). Introd. from tropical America. 



X. italicum Moretti. (X. commune Britton, probably.) 

 Infrequent on roadsides and river shores. Coastal Plain. 



X. chinense Mill. 



Frequent; fields, roadsides and city streets, in both provinces. 



^ X. echinatum Murr. 



Frequent in sandy soil of the Coastal Plain, Sussex County and 

 southward to Cape Charles (No). Chiefly on sea beaches, but 

 occasionally inland. 



Heliopsis Pers. Ox-eye. 



H. helianthoides (L.) Sweet. ( H. laevis Pers.) 



Frequent in thickets and meadows. Piedmont province; rare on 

 the Coastal Plain: Barlow Branch, 1 mi. s. of Townsend (NC), R. 

 R. Tatnall, 1235, 25 July 1931 (T); farm d}4 mi. w. n. w. of Long- 

 woods (Ta), Earle, 3748, 6 Sept. 1942 (A). July to mid-Sept. 



Eclipta L. 



E. prostrata (L.) L. (E. alha (L.) Hassk. See Fernald: Rhodora 

 47, 196-197. 1945.) 

 Infrequent, in waste places and wet ground, throughout the 

 Peninsula. Late Aug. to early Oct. 



Rudbeckia L. Cone-flower. 

 ^ ^ R. hirta L. Black-eyed Susan. 



Common in dry fields and meadows. Piedmont, and Coastal 



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