(i59) 



Carex saxatilis L. Thirty-mile River (Williams). 



Carex Grahami Boott. Near Stewart River (Williams). 



Carex atyina Sw. Dawson (Williams) ; White Horse 

 Rapids (Tarleton). 



Carex Ghnelini Hook. Skagway (Williams). 



Carex stylosa Drejer. Mouth of Bonanza ; also a speci- 

 men doubtfully referred to this species from Dawson Swamp 

 (Williams). 



Carex Yukonensis Britton sp. nov. 



Group of C. caesfiitosa. Culms slender, roughish, 2.5-4 

 dm. high, longer than the leaves. Leaves narrowly linear, 

 roughish margined, 2 mm. wide, the midvein prominent : 

 lowest spike subtended by a nearly filiform bract 1-2.5 cm - 

 long; staminate spike terminal, stalked, 2-2.5 cm - l° n g 5 

 pistillate spikes 2 or 3, 1.5-2 cm. long, 2.5 mm. thick, dense, 

 apparently erect, the upper nearly sessile, the lower one, 

 when 3 are present, filiform-stalked, loosely flowered toward 

 the base; perigynia nearly orbicular, nerveless, 1 mm. in 

 diameter, very minutely beaked, lenticular, sharply margined, 

 about as long as the black, ovate-oblong, acute or acutish 

 scale; stigmas 2 or 3. 



Mouth of Bonanza Creek, R. S. Willliams, June 18, 1899. 



Carex rigida Good ?. Mouth of Bonanza Creek (Williams). 



Carex acuiina Bailey. Mouth of Klondike (Williams). 



Carex fiodocarpa R. Br. White Pass (Williams). 



Carex Magcllanica Lam. Klondike River Bottom ; near 

 Mouth of Klondike (Williams). 



Carex cafiillaris L. Dawson (Williams). 



Carex altocaulis (Dewey) Britton. Hillside among willows, 

 Dawson and at Walker Gulch (Williams). 



Carex bicolor All. Ten miles above Lebarge (Williams). 



Carex concinna R. Br. Dawson (Williams) ; Lake Ben- 

 nett (Tarleton). 



Carex flifolia Nutt. Miles Canon (Williams). 



Carex Williamsii Britton, sp. nov. 



Glabrous; culms filiform, smooth, 1-2.5 dm. high. Leaves 

 filiform-linear, shorter than the culms, equitant, 1 mm. wide 



