236 



Cyperaceae 



Carex 



50 



Map 465 



Carex Richii (Fern.) Mack 



o 50 



Map 466 



Carex cumulata (Bailey) Mack. 



50 



Map 467 



Carex Longii Mack. 



46. Carex Longii Mack. (Bull. Torrey Bot. Club 49: 372. 1922.) (Carex 

 albolutescens of recent authors, not Schwein.) Map 467. Infrequent in 

 the northwestern counties where it is found in acid swamps and sloughs, 

 less often in sandy interdunal swales. 



Mass. to Venezuela; nw. Ind. and sw. Mich.; also in Bermuda. 



47. Carex albolutescens Schwein. (Bull. Torrey Bot. Club 49: 372. 

 1922.) (Carex straminea of Mack., probably not of Willd., Rhodora 40: 

 329-330. 1938.) Map 468. Frequent in southern Indiana in low flat 

 woods, associated principally with sweet gum and pin oak. It also is found 

 rarely along the northern border of the state where it occurs in low woods, 

 associated with beech and sugar maple, and occasionally in swamps. 



N. S. southw. along the coast to Fla., westw. along the Gulf to Tex. and 

 northw. in the Mississippi Valley to Ind. and sw. Mich. 



48. Carex alata Torr. Map 469. Infrequent in swamps and sandy 

 swales in the lake area. It is seldom plentiful in any locality; frequently 

 only one or two plants can be found at a station. 



Mass. to Fla. and Tex., westw. to Mich., Ind., and Mo. 



49. Carex tribuloides Wahl. (Including Carex tribuloides var. sang- 

 amonensis Clokey.) Map 470. Very common throughout the state in 

 swamps, open marshes, low woods, and ditches and on the low borders of 

 streams and ponds. 



Que. to Minn., southw. to Fla. and La. 



50. Carex cristatella Britt. (Carex cristata Schwein., not Clairv.) 

 Map 471. Common in low open woods, swamps, marshes, and roadside 

 ditches and on flood plains and banks of streams. Rare in the unglaciated 

 area. 



Mass. to N. Dak., southw. to Va. and Mo. 



51. Carex muskingumensis Schwein. Map 472. Frequent in low wet 

 places in woods where it often forms extensive and pure stands if not 



