Carex 



Cyperaceae 



261 



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o 3o 



Map 538 



Carex substricta (Kukenth.) Mack, 



TO 



Map 539 



Carex H ay den i i Dewey 



Lower sheaths filamentose ventrally; ligule much longer than wide; pistillate 

 spikes usually 3, the lower 1-6 cm long; perigynia elliptic to narrowly or 

 broadly ovate, 1.5 mm wide; pistillate scales appressed at maturity. 

 Leaf sheaths glabrous ventrally, without a minute hyaline jagged-ciliate 



margin at the mouth 114. C. stricta. 



Leaf sheaths hispidulous ventrally (and dorsally), usually with a minute 

 jagged-ciliate margin at the mouth; leaves usually paler green or 



glaucous 114a. C. stricta var. strictior. 



Beak of perigynium prominent, twisted when dry; at least the lower pistillate spikes 

 nodding or recurving; culms usually stout at the base, smooth above; stolons very 

 short and ascending or none 115. C. torta. 



111. Carex substricta (Kukenth.) Mack. (In Rydb., Flora Rocky Mts. 

 139. 1917.) (Carex aquatilis var. substricta Kukenth.) Map 538. Infre- 

 quent but locally plentiful in the northernmost tier of counties in marshes 

 and sloughs and on lake or river borders. 



Most of the reports of C. aquatilis from Indiana were doubtless based 

 upon specimens of this species. 



Newf. to Wash., southw. to N. J., Ind., and Nebr. 



112. Carex Haydenii Dewey. (Carex stricta var. decora Bailey.) Map 

 539. Infrequent in northwestern Indiana in wet prairies, ditches, and low 

 clearings in open oak woods. 



N. B. to Minn., southw. to N. J., 111., and Mo. 



113. Carex Emoryi Dewey. Map 540. Frequent along banks of creeks 

 and in swamps, sloughs, and swales in woods. Not known from the ungla- 

 ciated area. 



N. J. and Va. to Man. and Colo., southw. to Tex. and N. Mex. 



114. Carex stricta Lam. (Carex stricta var. angustata (Boott) Bailey.) 

 Map 541. Frequent in northwestern Indiana in marshes and open swamps 

 and on borders of creeks where it generally forms dense tussocks. Less 

 common than the following variety except in Lake County. 



