The Sedges of Nebraska 17 



town, Brown Co. (Bates); Lincoln; Hardy; "Prairies of 

 the Missouri"; Plummer Ford, Thomas Co. (Uni.). These 

 all have the " plump obovoid " perigynia with spikes too 

 short and compact for the species. 



a. var. varians Bailey. Long Pine; Valentine (Bates); 

 Pauline (Dr. Hapeman) ; Nebraska City, several sheets 

 from three collections (Uni.). These all have more 

 ellipsoid-obovate perigynia, with upper spikes approx- 

 imating. These divisions have to be forced more or less 

 to receive our forms. The width of leaves seems to 

 have little value. East and west cut no figure. I don't 

 suppose any one else would have made exactly this align- 

 ment without consultation, but I am convinced it is as 

 good as any other, and that is not satisfactory to me. 

 I am willing some one else should tackle them. 



24. C. aurea Nutt. In low meadows. Crawford; Valentine; Ft. 



Niobrara; Callaway; Loup City (Bates); Thedford (Dr. 

 Hapeman); Pine Ridge; Hat Creek Basin; Thedford 

 (Uni.). I have seen it in many places without collecting. 



25. C. setifolia (Dewey) Britton (C. eburnea Boott.). On dry 



wooded slopes ; rare. Merriman and Ft. Niobrara, Cherry 

 Co. ; Scotia, Greeley Co. (Bates) ; " Bluffs of the Missouri " 

 (Clements) (Uni.). A beautiful species. 



26. C. pennsylvanica Lam. Dry, sandy prairies and thickets. 



Valentine; Sargent; Long Pine; Red Cloud (Bates) ; Gor- 

 don ; Thedford ; Ponca, Dixon Co. ; Deuel Co. ; Crete ; 

 Nebraska City (Uni.). Very common and therefore 

 neglected. 



27. C. varia Muhl. Dry, wooded slopes; rare. Ft. Niobrara; 



Long Pine; Neligh, Antelope Co. (Bates). 

 a. var. colorata Bailey. Nebraska City, J. J. Thornber 

 (Uni.). 



28. C. durifolia Bailey (backii Boott.), var. nova subrostrata. 



Perigynium subglobosum e basi producta, 4 mm. longum 

 2.1 mm. latum plus minus, non regulariter triquetrum; ros- 

 trum I mm. longum plus minus, crassum truncatum non 

 hyalinum, apice cylindricuum ; basis c. i mm. longa fulva; 



161 



