Carex 



Cyperaceae 



267 



~T3 



Map 556 



Carex squarrosa L. 



Jan. 



Feb. 



Mar. 



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Miles 



56 



Map 557 



Carex vesicana L. 



40. § VESICARIAE 



Pistillate scales not rough-awned. 



Pistillate spikes oblong to cylindric, 17-many-flowered; leaf blades flat or the margins 

 somewhat revolute. 

 Perigynia not reflexed; bracts moderately exceeding the inflorescence. 

 Achenes not excavated on one side; perigynia 2.5-3.5 mm wide. 



Culms sharply triangular below the spikes, rough; perigynia appressed or 

 ascending; teeth of perigynia long or perigynia tapering gradually into 

 the beak; lower sheaths fragile, becoming strongly filamentose; ligule 

 much longer than wide; rootstocks short-creeping, without long horizontal 



stolons 128. C. vesicaria. 



Culms bluntly triangular below the spikes, smooth; perigynia spreading to 

 squarrose at maturity; teeth of perigynia short or perigynia abruptly 

 contracted into the beak; lower sheaths not fragile, not becoming 

 filamentose; ligule slightly if at all longer than wide; rootstocks with 



long horizontal stolons 129. C. rostrata. 



Achenes deeply excavated on one side; perigynia 5-6.5 mm wide 



130. C. Tuckermani. 



Lower perigynia reflexed or widely spreading, somewhat falcate; bracts many 



times exceeding the inflorescence 131. C. retrorsa. 



Pistillate spikes globose or short-oblong, 3-18-flowered; leaf blades involute 



132. C. oligosperma. 



Pistillate scales rough-awned 133. C. lurida. 



128. Carex vesicaria L. (Including Car ex vesicaria var. monile (Tuck- 

 erm.) Fern.) Map 557. Infrequent in the lake area in swamps, swales, 

 and swampy woods. 



Newf. to B. C, southw. to Del., Ind., Mo., N. Mex., and Calif.; also in 

 Eurasia. 



129. Carex rostrata Stokes. (Including Carex rostrata var. utriculata 

 (Boott) Bailey.) Map 558. Frequent in northern Indiana in marshes, 

 swamps, low woods, wet roadside ditches, and swales and on borders of 

 ponds and lakes, often in shallow water. It is a very widespread species 

 but generally is not plentiful in any one locality. 



