230 



Cyperaceae 



Carex 



— TO 



Map 450 



Carex interior Bailey 



,arex incomperta 



9. § STELLULATAE 



Perigynium broadest near the middle, strongly nerved both ventrally and dorsally, with 



smooth beak 28. C. seorsa. 



Perigynium broadest at the base, with serrulate beak. 



Perigynia 2.25-3.25 mm long, the beak very shallowly bidentate. 



Perigynia nerveless or few-nerved at the base ventrally, brownish or tawny, the 

 beak with ventral false suture inconspicuous; scales obtuse; anthers 1 mm or 



less long; leaf blades 1-3 mm wide 29. C. interior. 



Perigynia strongly nerved ventrally, deep green, the beak with ventral false 

 suture conspicuous; scales subacute; anthers 1-1.5 mm long; leaf blades 



0.25-1 mm wide 30. C. Howei. 



Perigynia 2.75-4.75 mm long, the beak deeply bidentate. 



Perigynia deep green at maturity, strongly nerved ventrally, the body suborbicu- 

 lar or very broadly ovate with raised margins, the beak less than half the 



length of the body, the teeth short, straight, rigid 31. C. incomperta. 



Perigynia stramineous to brown at maturity, faintly nerved ventrally, the body 



ovate to ovate-lanceolate (occasionally broadly ovate in C. sterilis). 



Staminate flowers terminal, basal, or in separate spikes; margin of perigynium 



slightly if at all raised, setulose-serrulate toward the beak; beak of 



perigynium half the length of the body or more, the teeth broad, largely 



hyaline and soft, generally bent or twisted; scales chestnut brown, with 



lustrous white margins 32. C. sterilis. 



Staminate flowers mostly at the base of the terminal spikes; margin of peri- 

 gynium serrulate toward the beak, the teeth short, stiff; scales tinged 

 yellowish brown, with narrow hyaline margin. 

 Perigynia 2.75-3.3 mm long, the beak about a third the length of the body, 



the teeth triangular; scales somewhat obtuse to acute 33. C. laricina. 



Perigynia 3.5-4 mm long, the beak about half the length of the body, the teeth 

 subulate; scales acute to somewhat cuspidate. (See excluded species 

 no. 9, p. 273) C. cephalantha. 



28. Carex seorsa E. C. Howe. {Carex rosaeoides E. C. Howe.) Map 

 449. Rare in wet woods and tamarack bogs in the dune area. The known 

 localities for this sedge in Indiana are : Dune Park, Keiser, and Tamarack 

 in Porter County and Pine Station (now north Clark Street, Gary) in 

 Lake County. 



Mass. to Ga., locally westw. to Ind. 



