a rex 



Cyperaceae 247 



Sterile shoots developing conspicuous culms; leaves not semi-evergreen; peri- 

 gynia rather sharply angled above; pistillate spikes few-flowered, the lower 



on long capillary peduncles 79. C. styloflexa. 



Sterile shoots reduced to tufts of leaves; leaves semi-evergreen; perigynia 



obtusely triangular 80. C. laxiflora. 



Bract-sheaths strongly serrulate on the edges. 



Sterile shoots reduced to tufts of leaves, not forming culms. 



Pistillate scales acuminate to strongly cuspidate, more than half the length of 

 the perigynia; beak of perigynium conspicuous, straight or oblique; leaves 



semi-evergreen; staminate spike peduncled, conspicuous 



80a. C. laxiflora var. semdata. 



Pistillate scales broadly obovate-orbicular, half the length of the perigynia or 

 less, strongly divergent at the base; beak of perigynium short, abruptly 

 bent; leaves not semi-evergreen, the blades 7-30 mm wide; staminate 



spike sessile, very slender, inconspicuous 81. C. albursina. 



Sterile shoots developing conspicuous culms; leaf blades 3-12 mm wide, not 

 semi-evergreen; pistillate scales mucronate to long-awned; beak of peri- 

 gynium short, abruptly bent. 

 Culms not reddish-tinged at the base; lower pistillate spikes not on long 

 capillary peduncles; staminate scales usually greenish white or slightly 

 tinged with reddish brown; staminate spike typically sessile or very 



short-peduncled; perigynia obovoid, 3-4 mm long 82. C. blanda. 



Culms reddish-tinged at the base; lower pistillate spikes on long capillary 

 peduncles; staminate scales strongly tinged with reddish brown; staminate 



spike long-peduncled; perigynia broadly obovoid, 2.5-3.2 mm long 



83. C. gracilescens. 



73. Carex plantaginea Lam. Map 496. Rather infrequent in the north- 

 ern counties in rich woods. South of the lake area it is local and found 

 mostly in humus on the wooded sandstone slopes of deep ravines, usually 

 in dense shade and associated with Hydrophyllum appendiculatum. No 

 specimen was found to confirm the report in Coulter's Catalogue from 

 Tippecanoe County. 



Que. to Sask., southw. to N. C. and Ky. 



74. Carex Careyana Torr. Map 497. Frequent but local in moist rich 

 woods, particularly in ravines. 



N. Y. to Mich., southw. to Va. and Mo. 



75. Carex platyphylla Carey. Map 498. All the Indiana collections of 

 this species are from the knob area (Chestnut Oak Upland) with the 

 exception of a single collection from Vigo County and one from Putnam 

 County. It is found in calcareous soils on dry open woodland slopes. No 

 specimen could be found to confirm Bradner's report from Steuben County, 

 but the occurrence of the species in the northern counties is not improbable 

 since it is known from southern Michigan. 



Que. to Mich., southw. to N. C. and 111. 



76. Carex abscondita Mack. (Carex ptychocarpa Steud.) Map 499. 

 A southern and Coastal Plain species found in Indiana in the southern 

 counties only. It is rare in dry beech woods and very rare in black-white 

 oak woods. 



Mass. to Ind.. southw. to Fla. and La. 



