Mackenzie : Notes on Carex 265 



This plant is so widely distributed and well marked that it 

 seems to me to be fully entitled to specific recognition. The flex- 

 uous head and the small spikes, with the perigynia-beaks conspic- 

 uous and widely divergent, present a marked contrast to the stifier 

 head, the larger spikes, and the appressed perigynia-beaks of Carex 

 tribuloides Wahl., its nearest ally. It ranges from Nova Scotia and 

 New Brunswick to Minnesota and south to the District of Columbia 

 and Illinois, but is rare in the southern part of its range. The fol- 

 lowing specimens have been examined by me : 



Nova Scotia: Pictou, Hoive & Lang 459, July 12, 1901. 



New Brunswick : Kouchibougnac, Fowler. 



Quebec : Montmorenci Falls, John Maconn 67783 and 67784, 

 July 7 and June 28, 1905 ; Riviere du Loup, Egglcston jo6j, 

 August, 1902. 



Maine: Ft. Kent, Knight, August 20, 1905; Beech Hill 

 Road, Mt. Desert Island, Faxon, July 4, 1892; Orono, Briggs, 



j 



il62 t July 6, 1893. 

 New Hampshire : " 

 ite Mountains, Tucket 

 Vermont : Rutland 



July 16, 1896; 



J 



Mts 



Ontario : 



J 



26 



Khigh, July 25, 1905 ; Ottawa, John Maconn 26836, J 



1900. 



Minnesota : 



J 



Hall, J 



J 



^ Carex chihuahuensis sp. nov. 



Clumps medium-sized, the rootstocks long-creeping, culms 2- 

 3 dm. high, filamentose at base, strict, slightly roughened on the 

 angles, exceeding the leaves. Leaves with well-developed blades 

 four to eight to a fertile culm, clustered on the lower fourth, the 

 sheaths overlapping, the ligules not prolonged, the blades flat, as- 

 cending, 2-3 mm. wide, 5-1 5 cm. long, very rough towards the 

 apex ; inflorescence consisting of numerous scarcely distinguish- 

 able spikes densely aggregated (or the lower clusters separate) 

 •nto a compound or somewhat decompound ovate or oblong head, 

 2 ~7 cm. long, 7-15 mm. wide, the individual spikes with 4-10 as- 



