THE IOWA SEDGES. 337 



5. C. tuckermani Dew. Am. Jour. Sci., xi.ix. 48(1845). 



Illus. Flora, i, 29S, rig. 6S9; Gray's Man., 6th ed., 594; Tracy, Fl. Mo., 95 ; 

 Brendel, Fl. Peoriana, KS: Uphani, Supl. Fl. Minn., 49: Bruhin, Fl., 

 Wis., 2S0. 



Low swampv ground, rare: not before reported from Iowa. 



Grinnell, collected about 1887. by Prof. H. W. Norris, and 

 now in the herbarium of the Iowa i\.gricultural College. Its 

 southern range recorded in our text books is New Jersey. 

 Michigan, and Minnesota. The author has a specimen in his 

 herbarium collected in Illinois many years ago bv Dr. S. B. 

 Mead, and it is reported from Missouri by Prof. Tracy. 



6. C retrorsa Schwein. Ann. Lvc. X. Y .. 1. 70 (1S24). 



Illus. Flora, 1, 29S, fig. 691; Gray's Man., 6th ed., 595: Arthur, Cont. Fl 

 Iowa, v: MacMillan, Metas. Minn. Val., 127; Brendel, Fl. Peoriana, 88; 

 Hale, Add. Fl. Wis., 5; Rvdt.erg.Fl.Bl. Hills, S. D., 528; Fink, Iowa 

 Acad. Sci.. iv, 105. 



Low ground in woods and along the margins of streams 

 and sloughs: northern half of the state, rare. This is some- 

 times found growing with C. lupuliua Muhl. between which 

 hybrids have been found in New York and Michigan and 

 probably occur within our limits. 



Estherville, 1881, and Iowa Lake. 1S96. C ratty ,■ Fayette 

 county. 1S95. Miss Omi 31. Rounds. 



7. C. lurida parvlla [Paine) Bailey. Bull. Toit. Club. 



xx, 418 (1893). 



C. tentaculata var. farvula Paine, Cat. Oneida PI., 105 (1S65). 

 Illus. Flora, 1, 297: Hitchcock, PI. Ames, 524. 



Sloughs, very rare, Ames, 1886. Hitchcock. This is the C. 

 lurida of Hitchcock's Plants of Ames. 524. a specimen of 

 which is now in the Iowa Agricultural College herbarium. 



"Low — (8-16 in. high), very slender, with one or two 

 spikes which are half or less the size of those in the type, 

 sessile, or very nearly so; peryginia not more than half the 

 size of those in the common form."' Prof. L. H. Bailey in 

 Bud. Torr. Club. 1. c. 



