The Sedges of Nebraska i 5 



specimens the scales are half obtuse and half lengthened- 

 acute or acuminate. It should not be thought of as two 

 species, for the forms are innumerable in this one state. A 

 specimen sent in after this species was written up, collected 

 in Grand Island, Hall Co., by Prof. C. J. Elmore, very 

 young, has the almost orbicular achenes called for by 

 decora, together with the lengthened scales. It was rightly 

 named by the collector. It is simply another remarkable 

 variation in this species, being quite unlike the Minden 

 decora above. 

 12. C. nebraskensis Dewey. In saturated soil, spring holes and 

 swales. Over all the western part of the state. Chadron, 

 Dawes Co. ; Kennedy, Valentine and Arabia, Cherry Co. ; 

 Callaway, Custer Co. (Bates); Sioux Co.; Pine Ridge, 

 Sheridan Co. ; Broken Bow and Anselmo, Custer Co. ; Law- 

 rence Fork, Banner Co. ; Deuel Co. ; Thedford and Halsey, 

 Thomas Co.; Mullen, Hooker Co. (Uni.). One of my 

 Kennedy collections, Aug. 1912, has nearly all the pistil- 

 late spikes staminate for one third of the upper end, a char- 

 acter that is given to C. aquatilis in the manuals. A very 

 glaucous form is common, not noticed in manuals. The 

 achenes of this interesting species vary from 3.5-4.25 mm. 

 long, and from ovate to elliptic and obovate. The elliptic 

 forms are from Arabia and Hat Creek basin. 

 13. C. aquatilis Wahl. In the marsh of Boardman Creek, Ken- 

 nedy, Cherry Co., due west of the old John Bachelor Ranch 

 House, in at least two large patches, covering many square 

 rods (Bates, 191 1, 1912). This marsh- some 8 miles long 

 and half a mile wide is the home of Carex limosa L., C. 

 aquatilis Wahl., Cyperus engelmanni Steud., Eriophorum 

 angustifoHum Roth., Caltha palustris L., Aster jiinceus Ait., 

 and other rare plants. Yet I have been the only botanical 

 visitor for 24 years. It is worthy of exploitation by the 

 best. 



14. C. limosa, L. In the mossy marsh of Boardman Creek, Ken- 



nedy, as above. Near C. aquatilis (Bates). 



15. C. davisii Schwein. and Torn Lincoln and Otoe Co. (Uni.). 



159 



