Carex 



Cyperaceae 



245 



^0 



Map 492 

 Carex aurea Nutt. 



50 



Map 493 



Carex tetanica Schkuhr 



Pistillate spikes oblong or linear-oblong, 5-8 mm wide; perigynia spreading at 



maturity, 3-5 mm long, abruptly narrowed at the apex into a minute, more or 



less strongly bent beak; leaf blades 2.7-7 mm wide; culms stout. . . .71. C. Meadii. 



Culms strongly aphyllopodic; stolons superficial; plants of rich humus in shady woods. 



72. C. Woodii. 



70. Carex tetanica Schkuhr. Map 493. Infrequent in northern Indiana 

 in marly or sandy soils, bordering marshes and lakes ; becoming frequent 

 to locally common on the dunes where it occurs especially on low sandy 

 interdunal flats ; rare in southern Indiana, in open post oak flats. 



Mass. to Alberta, southw. to Pa. and Iowa. 



71. Carex Meadii Dewey. {Carex tetanica var. Meadii (Dewey) Bailey.) 

 Map 494. Infrequent in the lake area and in southeastern Indiana; fre- 

 quent in the dune area. Its habitat is much that of C. tetanica except that 

 C. Meadii also occurs in drier soils and in even more open situations. 

 Carex Meadii as a rule is readily distinct from C. tetanica except at Pine 

 in Lake County where the two species are closely associated and inter- 

 mediate forms are frequent. The same is true of C. tetanica and C. Garberi, 

 at this station, and, as noted under the latter species, such transitional 

 forms may be due to hybridization. 



N. J. to Sask., southw. to Ga. and Tex. 



72. Carex Woodii Dewey. (Carex tetanica var. Woodii (Dewey) Wood; 

 Carex colorata Mack.) Map 495. Rare in the northern counties. So far 

 this species is known in Indiana from three collections only, all by Deam : 

 in a moist red and white oak woods 4 miles northwest of Valparaiso, 

 Porter County, June 2, 1927, in a rich beech-maple woods 1 mile south- 

 east of North Liberty, St. Joseph County, May 23, 1934, and June 13, 

 1935 and at the base of a sugar maple slope in Steuben County. At 

 the latter locality it was associated with Impatiens biflora, Solidago caesia, 

 Viola canadensis, Smilacina racemosa, Polygonum virginianum, Isopyrum 

 biternatum, and Caulophyllum thalictroides. 



N. Y. to Man., southw. to D. C. and Mo. 



