THE IOWA SEDGES. 



jo9 



Appanoose county. July. 1S96. Fitzpatnck ; near Skunk 

 River. Jasper county. July 3. 18S6, Norris. 



11. C. tvphixoides Schwein. Ann. Lye. 1. 66 (1824). 



C. squarrosa Gray's Man., 6th ed., 596 (1890), in part. 

 C. squarrosa var. typhinoides Dewey, Am. Jour. ScL, xi, 316 (1826). 

 Illus. Flora 1, 302, fig. 701. 



This species, not before reported from Iowa, closely resem- 

 bles C. squarrosa L. from which it is distinguished by its 

 darker green leaves. 4 to 5 lines wide, and the broader akene 

 which is 3 angled, ovoid -elliptic, with concave sides It oc- 

 curs in swamps in the eastern part of the state, and includes 

 many of the Iowa forms heretofore referred to the preceding 

 species. 



Fredericksburg, Chickasaw county. Miss Howe; banks of 

 the Wapsipinicon, Scott county. July. 1S96, and Clinton and 

 Muscatine counties, usually growing with C. asa-grayi Bailey, 

 Barnes & Miller; Mississippi bottoms. Oquawka. Illinois, 

 Patterson. 



12. C. trichocarpa Mu hi. Willd. Sp. PL. iv. 302 (1S05) 



C. trichocarpa var. imberbis Gray's, Man., 5th ed., 597 (1S67). 



C. trichocarpa var. detveyi Bailey, Bot. Gaz., x, (1SS3), 



C. trichocarpa var. Icerviconica (Dew.) Hitchcock. Trans. St. Louis Acad. 



Sci., 524 (1S91). 

 Illus. Flora, 1, 302, fig. 702; Gray's Man., 6th ed., 59S; Arthur, Cont. Fl. 



Iowa, iv; Hitchcock, PI. Ames, 524: MacMillan, Metas. Minn.Val., 124; 



Tracy, Fl. Mo., 94; Brendel, Fl. Peoriana, 63; Webber, PI. Neb., 9S. 



Sloughs and margins of ponds and streams; common and 

 very variable. We have besides the type the forms previ- 

 ously called var. imberbis and var. dezveyi. of which the latter 

 at least, seems worthy of varietal recognition. 



Estherville, Emmet county. June 18. 1882, the pubescent 

 form. Cratty; Iowa City, Hitchcock ; Johnson county, 1894, 

 Shimek; Ames, 1880, Bessey, and 1886, Hitchcock; West 

 Davenport. 1895, and Muscatine county, the glabrous form, 

 Barnes & Miller; Shelby county. 1894. a form with pube- 

 scent perigynia, but the long, wide-spreading teeth like those 



