Cyperus CYPERACEAE Eleochans 



(D); sand pit west of bridge, 1 mi. s. of Choptank Mills (K), R. R. 

 Tatnall, 5048, 15 Sept. 1942 (T), and 5224, 19 Aug. 1945 (T, A). 



C. dipsaciformis Fern. 



Rare, in rocky woods and open sandy soil: Wilmington, woods 

 along the Brandywine Creek, Commons, 28 July 1866 (A) ; Middle- 

 town (NC), E. B. Bartram, 16 Aug. 1908 (A). 



C. Plukenetii Fern. (C. retrofractus of Gray's Man., ed. 7. See 

 Rhodora 47, 110-113. 1945.) 

 Rare, in dry ground: Rehoboth (S), Commons, 13 Aug. 1896, 

 (A); Millsboro (S), S. Brown, 21 Sept. 1907 (A); city park, Salis- 

 bury (Wi), (A. V. Smith), R. R. Tatnall, 4325, 9 Aug. 1939 (T, P, G) 



C. ovularis (Mx.) Torr. 



Frequent in both Coastal Plain and Piedmont provinces, chiefly 

 in dry sand, but occasionally in meadows. July to mid-Sept. 



C. retrorsus Chapm. (C cylindricus of Gray's Man., ed. 7.) 



Frequent; dry fields, sandy pinelands, beaches and dune hol- 

 lows on the Coastal Plain. Mid-July to Sept. 



y U C. Grayii Torr. 



Frequent on sand dunes and beaches of the Coastal Plain. 

 Aug., Sept. 



C. filiculmis Vahl. 



Fields, roadsides and sandy pine woods, chiefly on the Coastal 

 Plain. July to early Oct. 



Var. macilentus Fern. 



Frequent; sandy fields and roadsides. July to early Sept. 



Dulichium Pers. 



D. arundinaceum (L.) Britton. 



Common in shallow water and on pond borders, chiefly on the 

 Coastal Plain. Mid-July to early Oct. 



Eleocharis R. Br. Spike Rush, 



E. quadrangulata (Mx.) R. & S. 



Infrequent; swamps, streams and ponds of the Coastal Plain. 

 Mid-July to Aug. 



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