Coreopsis COMPOSITAE Bidens 



New Castle to Sussex and Dorchester Counties. Mid-July to 

 early Sept. 



C. tinctoria Nutt. 



Escaping from cultivation at Wilmington and Ocean City (Wo). 



C. tripteris L. 



One collection: rocky islands in the Susquehanna River at 

 Conowingo (Ce), J. Crawford, 29 July 1924 (A). Locahty now- 

 submerged. 



Bidens L. Bur Marigold. 



B. bidentoides (Nutt.) Britton. (Coreopsis Nutt.) 



Infrequent; muddy, tidal shores of Delaware River, near Wil- 

 mington, and of Elk River: Blair's Shore, 4 mi. s. of Elkton (Ce), 

 Long, 57096, 20 July 1941 (A) ; stony shore of Susquehanna River, 

 at Frenchtown (Ce), G. R. Proctor, 1227, 10 Sept. 1944 (P). Sept., 

 early Oct. 



B. discoidea (T. & G.) Britton. 



Infrequent, in swamps and low ground of the Coastal Plain. 

 Mid-Sept., early Oct. 



B. frondosa L. Beggar Ticks. 



Frequent in low ground, Piedmont and Coastal Plain. Sept., 

 mid-Oct. 



B. vulgata Greene. Beggar Ticks. 



Rare, in northern New Castle County: marshes near Wilming- 

 ton, Canhy, 23 Sept. 1899 (D) ; wet railroad bank, Southwood (NC), 

 R. R. Tatnall, 3566, 30 Sept. 1937 (T). 



B. comosa (Gray) Wiegand. 



Infrequent in damp ground about Wilmington; rare farther 

 south: Townsend (NC), Canhy, 4 Sept. 1899 (D); roadside ]4 mi- 

 s. of Magnolia (K), R. R. Tatnall, 1559, 3 Sept. 1932 (T); field 6 

 mi. n. w. of Easton (Ta), Earle, 1662, 19 Sept. 1937 (P). Sept. 



B. connata Muhl. Swamp Beggar Ticks. 



Infrequent in low grounds. New Castle County; seldom col- 

 lected farther south: wet sand n. of Ocean City (Wo), Fogg, 11406, 

 12 Sept. 1936 (P); meadow s. w. of Easton (Ta), Earle, 3997, 1 Oct. 

 1944 (P); 2 mi. s. w. of Longwoods (Ta), Earle, 4017, 1 Oct. 1944 

 (P). Sept., early Oct. 



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