14 John Mallory Bates 



It is easily seen that this can not be placed under any 

 described form; and it becomes equally evident that one 

 species with two main varieties and other sub-species is a 

 better treatment than the two species as given in Britten's 

 Manual. 



7. C. riparia Curtis. In swales and marshes ; very dark green ; 



taking the whole ground and making heavy hay, where not 

 too wet to cut. Laurel, Cedar Co. ; Otoe Co. (Uni.) ; Cal- 

 laway, Custer Co. ; Scotia, Greeley Co. ; St. Paul, Howard 

 Co.; Nemaha, Nemaha Co. (Bates). Probably to be found 

 in several more stations. 



8. C. lanuginosa Michx. (filiformis latifolia Boechl.). In swales 



and banks. Extremely common. Minden (Hapeman) ; 

 Nebraska City; Thedford ; Anselmo ; Crawford ; Pine Ridge, 

 Sheridan Co.; Whitman (Uni.); Red Cloud; Ewing; St. 

 Paul; O'Neill; Crawford; Harrison, Sioux Co. (Bates). 



9. C. parryana Dewey. In the Platte meadows, a few feet 



above water. Rare ; probably introduced from Wyoming by 

 the waters of the Platte. Minden (Dr. Hapeman) ; Minden 

 (Bates, under guidance of Dr. Hapeman). 



10. C. fusca All. (biixbaumii Wahl.) (polygama Schkuhr.). In 



marshy ground; rare. S. W. Holt Co. and northeast of 

 Newport at Kirkwood P. O., probably over the line in Holt 

 Co. (Bates). 



11. C. stricta Lam. In bogs and wet banks; very common in 



some form. Halsey ; Norway, Thomas Co. ; fairly typical 

 (Uni.). 



a. var. angustata (Boott.) Bailey. Lincoln; Valentine; 

 Minden; Emerson, Dixon Co. (Uni.) ; Merriman; Val- 

 entine; Johnstown; St. Paul (Bates); Minden (Hape- 

 man). 



b. var. decora Bailey (C. haydeni Dewey). Minden 



(Hapeman in my herbarium; not in his specimens in 



University or Minden). The achenes are obovate, 



which is the only mark separating it from angustata. 



The angustata type, varying greatly in style of scales and 



length of spikes, prevails throughout the state. In many 



158 



