Cyperus CYPERACEAE Cyperus 



One known collection: "Moist soil, Baltimore Hundred," 

 (southeastern Sussex County), Commons, 10 Sept. 1875 (A). 

 The northern limit of range for this species. 



C. flavescens L. (Incl. var. poaeforinis (Pursh) Fern. Rhodora 

 41, 529-530. 1939.) 

 Frequent in moist ground, in both Piedmont and Coastal Plain 

 provinces. Aug. to early October. 



C. diandrus Torr. 



Infrequent, in wet soil of the Piedmont and Coastal Plain. 

 Aug., Sept. 



C. rivularis Kunth. 



Frequent; ditches and banks of streams, Piedmont and Coastal 

 Plain. Mid- Aug., Sept. 



C. filicinus Vahl. (C Nuitallii of Gray's Man., ed. 7.) 



Frequent in coastal salt marshes; occasional in upland meadows. 

 Aug. to mid-Oct. 



C. polystachyos Rottb. var. texensis (Torr.) Fern. (C. micro- 

 dontus Torr. See Rhodora 41, 530. 1939.) 

 Infrequent; stream margins, tidal mud and pine woods, Coastal 

 Plain. Aug. to mid-Oct. 



C. sabulosus Mart. &Schrad. (C.^afescens of Gray's Man., ed. 7.) 



Sandy fields and clearings, in Accomac and Northampton 

 Counties; "a frequent weed" in the latter. Aug. to Oct. 



C. compressus L. 



Infrequent; sandy soil of the Coastal Plain. Aug., Sept. 



C. virens Mx. {C . pseudovegetus Steud. See Rhodora 47, 109-110. 

 1945.) 



Common; ditches, low open ground and pine woods, in the 

 Coastal Plain. July to mid-Oct. 



A southern species, here near its northern limit. 



C. dentatus Torr. 



Infrequent; sandy swamps and river shores of the Coastal Plain. 

 Mid-July to Sept. 



C. rotundus L. 



Rare: sandy shore, Collins Beach (NC), Commons, 12 Oct. 



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