THE IOWA SEDGES. 350 



1886, JVbrris ; woodlands along the Mississippi river, Clinton 

 and Muscatine counties, Barnes d: Miller; Grinnell, 1877, 

 Jones; Ames, July 1, 1897, Stewart. 



65. C. tribuloides WaM. K. Acad. Handl. xxiv, 145 



(1803) . PI. viii. 



C- lagofodoides Schkuhr, Nacht., 20 (1806;. 

 Illus. Flora, 1, 356, fig. S62 ; Gray's Man., 6th ed., 620; Arthur, Fl. Iowa, 34; 

 MacMillan, Metas. Minn. Val , 10S; Bessey, Cont. Fl. Iowa, 124; Bren- 

 del, Fl. Peoriana, 62; Hale, Add. Fl. Wis., 5; Fink, Proc. Iowa Acad. 

 Sci., iv, 106. 



Low ground, usually near timber; probably throughout the 

 state but not plentiful. 



Ames and Grinnell, July 4, 1886, Johnson; Eldridge, Scott 

 count}-. June, July. 1897. Barnes <£ Miller; Johnson county, 

 Julv. 1897, Misses Finch <£ Caranagh; Keokuk, June 1, 

 1897, Shimek; Montrose, Sept., 1883, Arthur. 



66. C. tribuloides bebbii (Olncy) Bailey. Typ. Car.. 55 



(1889). 



C- bebbii Olney. Exsic. II, 12 (1870). 

 Illus. Flora, 1, 356; Bailey in Gray's Man., 6th ed., 620: MacMillan, Metas. 

 Minn. Val., 109; Brendel, Fl. Peoriana, SS: Webber, Fl. Neb., 98; Ryd- 

 berg, Fl. Bl. Hills, S. D., 528; Fink, Proc. Iowa Acad. Sci., IV, 106. 



Very low ground, sloughs and margins of ponds and lakes; 

 growing in dense tufts, the spikes clustered in a dense head. 

 Not before reported from Iowa. 



Emmet county, one mile east of Armstrong, July, 1895, 

 Cratty. Two forms occur; one with more slender culms, 6 

 to 12 inches high, the spikes about 3 lines long; the other 2 

 feet high, stouter, with the spikes a third larger. An imper- 

 fect specimen collected by Mr. Skinner in 1895 at Fayette 

 probably belongs here. 



67. C. TRIBULOIDES MONILIFORMIS (Tuck.) Britton. Illus. 



Flora, 1, 356 (1896.) 



Q. scoparia var. moniliformis Tuck. Enum. Meth., 17 (1S43). 

 C- tribuloides var. reducta Bailey. Proc. Am. Acad., xxn, 118 (18S6). 

 Illus. Flora, 1. c; Gray's Man.. 6th ed., 620; Fink, Proc. Iowa Acad. Sci., 

 iv, 106. 



