242 



Cyperaceae 



Carex 



Map 486 



Carex tonsa (Fern.) Bi'ck 



n. 



o To 



Map 487 



Carex Richardsonii R. Br. 



Map 488 

 Carex picta Steud. 



form is analogous to the plant which has been called Carex umbellata f. 

 vicina (Dewey) Wieg. but the type specimen upon which that form is based 

 is the long-beaked plant (C. rugosperma Mack.) so that the name cannot 

 be applied to the Indiana plant. 



Newf. to B. C, southw. to D. C. and 111. 



62. Carex rugosperma Mack. (Bull. Torrey Bot. Club 42: 621. 1915.) 



(Carex umbellata of many recent authors, not Schkuhr.) Map 485. Infre- 

 quent in the northern tier of counties. It is found in dry, sandy oak 

 woods, open drained low woods, and on borders of drained marshes. 

 N. S. to Minn., southw. to Md. and Ind. 



63. Carex tonsa (Fern.) Bickn. (Bull. Torrey Bot. Club 35: 492. 1908.) 

 (Carex umbellata var. tonsa Fern.) Map 486. Frequent in the dune area 

 on low, open dunes and in dry, open woods. 



Que. to Alberta, southw. to D. C. and Ind. 



15. § DIGITATAE 



Basal spikes present; terminal spikes androgynous; pistillate scales abruptly cuspidate 

 or short-awned. (See excluded species no. 15, p. 274.) C. pedimculata. 



Basal spikes absent; terminal spike staminate; pistillate scales blunt to acute 



64. C. Richardsonii. 



64. Carex Richardsonii R. Br. Map 487. Known in Indiana only from 

 the dunes at Pine, Lake county. Pine is now within Gary on the east 

 side of Clark Street, an eighth of a mile south of Lake Michigan. Here 

 on a sandy knoll at the edge of a marsh, Carex Richardsonii is associated 

 with Andropogon scoparius, Castilleja coccinea, Erigeron pulchellus, 

 Senecio pauperculus var. Balsamitae, Lithospermum canescens, Potentilla 

 fruticosa, Carex umbellata and C. aurea, Liatris spicata, Betula papyrifera, 

 Pedicularis canadensis, Krigia bi flora, Rhus trilobata var. arenaria, R. 

 radicans, R. Vernix, Arabis lyrata, Hypoxis hi7*suta, and Koeleria cristata. 



This is one of the rarest sedges in the eastern states where it is very 

 local in its distribution (although its known range seems to indicate that 



