Fuirena 



Cyperaceae 



191 



50 



Map 359 



Eriophorum spissum Fern. 



Jan. 



Feb. 



Mar. 



Apr. 



May 



June 



July 



Aug. 



Sept. 



Oct. 



Nov. 



Dec 



Miles 



50 



Map 360 



Eriophorum g r a c i I e Koch 



Eriophorum angustifolium Roth 



Newf. to B. C, southw. to Conn., Pa., Ind., Nebr., and Calif.; also in 

 Eurasia. 



3. Eriophorum angustifolium Roth. Map 361. Infrequent on the bor- 

 ders of sloughs and in marshes and bogs. 



Subarctic Amer., southw. to Maine, Ont., 111., Iowa, and mts. of Colo, 

 and Oreg. ; also in Eurasia. 



4. Eriophorum viridi-carinatum (Engelm.) Fern. Map 362. Infre- 

 quent throughout our northern counties where it is usually found growing 

 in sphagnum in open tamarack bogs and less often in sedge marshes. 



Newf. to Sask. and B. C, southw. to Conn., N. Y., Ohio, Wis., Oreg., 

 and in the mts. to Ga. 



5. Eriophorum virginicum L. (Including Eriophorum virginicum f. 

 album (Gray) Wieg.) Map. 363. Since the bristles of this species vary 

 from tawny to white with intermediate forms, I have not attempted to 

 separate our plants on the basis of this character. Nearly all of our 

 plants at maturity have white or whitish bristles. It is found in marshes 

 and tamarack bogs. 



Newf. to Ont. and Man., southw. to Fla. and Nebr. 



467. FUIRENA Rottb. Umbrella Grass 



1. Fuirena pumila Torr. (Rhodora 40: 396-398. 1938.) (Fuirena 

 squarrosa of recent authors, not Michx.) Map 364. This sedge is very 

 local, having been found in only a few places in two counties. It grows 

 in moist sand in interdunal swamps and in wet sand on the borders of 

 lakes. I found it to be rather frequent in wet sand on the south side of 

 Walker Lake in Porter County. 



Mass. to Mich, and Ind., southw. to Fla. 



