218 Cyperaceae Carex 



perigynia) ; perigynia appressed or ascending; leaf sheaths not sep- 

 tate-nodulose. 

 Perigynia rounded and minutely beaked at the apex; pistillate spikes 



oblong, 1-2.5 cm long 32. § Limosae, p. 260. 



Perigynia tapering into a beak neai'ly the length of the body; pistillate 

 spikes linear, 2-6 cm long. .C. prasina in 25. § Gracillimae, p. 253. 

 Terminal spike gynaecandrous. 



Perigynia transversely corrugated 31. § Shortianae, p. 259. 



Perigynia not transversely corrugated 33. § Atratae, p. 260. 



Style persistent, indurated, continuous with the achene. 



Perigynia subcoriaceous and firm 38. §Paludosae, p. 264. 



Perigynia membranaceous. 



Perigynia obconic or broadly obovoid, truncately contracted into the long, 



subulate beaks 39. § Squarrosae, p. 266. 



Perigynia from lanceolate to ovoid or globose-ovoid, not truncately con- 

 tracted. 

 Perigynia lanceolate or ovoid-lanceolate, tapering into the beak. 



Perigynia many-nerved, slightly inflated, 3 mm wide or less, yellowish 



green; achenes 3.5 mm long 36. § Folliculatae, p. 263. 



Perigynia strongly ribbed, strongly inflated, ovoid-lanceolate, 3.5 mm 

 wide or more, green; achenes 5 mm long. .41. § Lupulinae, p. 269. 

 Perigynia broader, abruptly contracted into the beak, usually strongly 

 ribbed. 



Perigynia finely and closely ribbed 37. § Pseudo-Cyperi, p. 263. 



Perigynia coarsely ribbed. 



Perigynia 7-10 mm long; achenes 2-3 mm long, 1.25-2.25 mm wide. 



40. § Vesicariae, p. 267. 



Perigynia 10-20 mm long; achenes 2.5-6 mm long, 2-4 mm wide. 

 41. § Lupulinae, p. 269. 



1. § INTERMEDIAE 



Perigynia ovate-orbicular, 2.5-3 mm long, 1.5-1.75 mm wide, abruptly contracted into 

 a beak about a fourth the length of the body 1. C. Sartwellii. 



Perigynia elliptic, 4-4.5 mm long, 1-1.3 mm wide, very gradually long-beaked 



la. C. Sartwellii var. stenorrhyncha . 



1. Carex Sartwellii Dewey. Map 418. Occasional in marshes and marly 

 sloughs, more rarely in sandy ditches, in the northern half of the state; 

 becoming frequent in the dune area. 



Ont. and w. N. Y. to B. C, southw. to 111., Mo., Nebr., and Colo. 



la. Carex Sartwellii var. stenorrhyncha Hermann. (Rhodora 40: 78. 

 1938.) Map 418a. Known only from two localities, both in Lake County: 

 in a prairie marsh south of Sheffield St. and west of Calumet Ave., two 

 miles north of Hammond, Deam no. 53920 (Deam Herbarium) ; and on 

 a prairie east of Wolf Lake, Hermann no. 6052 (Type in Gray Herbarium). 



2. § ARENARIAE 



2. Carex siccata Dewey. (Carex foenea Willd., according to Svenson 

 in Rhodora 40: 325-329. 1938.) Map 419. Infrequent in the lake area in 

 dry open sandy soil and in open black oak woods. 



Maine to Wash, and Mack., southw. to N. J., Ind, Nebr., and in the 

 mts. to Ariz. 





