I 86 CYPERACEAE 



Spikes oblong or oblong-cylindric; staminate scales with 



short rough awns. 146. C. hystricina. 



Perigynia obtusely triangular, scarcely inflated. 



Perigynia teeth erect, I mm. long; body of beak 1 mm. 



long. 147. C. Pseudo-Cyperus. 



Perigynia teeth recurved or spreading, 1.5-2 mm. long; 



body of beak 1.5-2 mm. long. 148. C. comosa. 



43. Squarrosae. 



Scales exceeding perigynia; terminal spike small, normally 



staminate. 149. C. Frankii. 



Scales much shorter than perigynia; terminal spike gynae- 

 candrous. 

 Scales acuminate or awned; spikes oval. 150. C. squarrosa. 



Scales obtusish; spikes oblong-cylindric. 151. C. typhina. 



44. LUPULINAE. 



Pistillate spikes globose or subglobose; style straight. 



Scales usually strongly awned; pistillate spikes 1-12- 



rlowered. 152. C. intumescens. 



Scales usually obtuse, varying to slightly cuspidate; 



pistillate spikes 6-30-flowered. 153. C. Asa-Crayi. 



Pistillate spikes oblong or cylindric; style abruptly bent. 

 Achenes longer than thick, the angles not prominently 



knobbed. 154. C. lupulina. 



Achenes not longer than thick, the angles prominently 



knobbed. 155. C. lupuliformis. 



1. C. siccata Dewey. In dry fields and on hills: Me. to Alaska, 



south to R. I., N. J., Mich., Ariz, and Cal. 



Conn. Stratford and Southington; reported as occasional or 



local elsewhere. 

 N. Y. Bank of Hudson, near Hastings, one colony. 

 N. J. Succasurina, Morris Co. and Assinpink Creek, Mercer Co. 

 Pa. Reported from Northampton Co. 



A rare and local species with us. 



2. C. retroflexa Muhl. In woods and thickets: Mass to Ont., 



Mich., Fla. and Tex. 



Conn. Pomfret; reported as scattered throughout except in 

 Litchfield Co., increasing southwestward. 



N. Y. The Bronx, and scattered up the Hudson Valley; not re- 

 ported from the Catskills. North of the moraine on Long 

 Island and at Giffords, S. I. /^' _ ?jd %t/v ^ t ^3C*^*' 



N. J. Bergen, Warren, Sussux.nnd Passaic counties; reported also 

 from Hunterdon and Monmouth counties (the latter very 

 doubtful). 



Pa. Bucks, Delaware and Montgomery counties. Reported from 

 Wayne and Northampton counties. 



