(i58) 



Type collected by R. S. Williams in low marshy ground 

 in river bottoms near White River, Aug. 17, 1899. Also 

 secured by Messrs. Onion, Kennicott and Hardisty in 1861- 

 62. It has somewhat the appearance of low forms of P. 

 paua'fora (Presl) Kuntze, but it is stouter and more leafy, 

 and the flowering scales are longer and not truncate at the 

 apex as in that species. The deep purple of the flowering 

 scales makes a strong contrast with their broad white hyaline 

 margins, giving the spikelets a beautiful and striking appear- 

 ance. 



Festuca Altaica Trin. Hillsides at Dawson, June 25 and 

 July 13, 1899; White Pass, August 26, 1899 (Williams). 

 This is closely related to F. scabrella Torr., differing in its 

 more acuminate flowering scales, but otherwise strongly re- 

 sembling it. Should it prove the same, Torrey's name must 

 be considered a synonym, it having been published several 

 years later than that of Trinius. 



Fcstuca ovina polyphylla Vasey. Skagway (Williams). 



B ramus Pumpellianus Scribn. Dawson (Williams) ; Ft. 

 Selkirk (Tarleton). 



Bromus racemosus L. Dawson. Introduced (Williams). 



Agropyron Richardsoni Schrad. Dawson (Williams). 



Agropyron s-picatu.ni tcnuispiaim (S. & S.) Rydberg. 

 Dawson (Williams). 



Agropyron tenerum Vasey. River bank opposite Dawson 

 (Wiiliams). 



Hordcum nodosum L. Dawson. Introduced (Williams). 



Elymus arcnarius L. Skagway (Williams). 



Family Cyperaceae. 



Eriophorum polystachyon L. Mouth of Klondike (Wil- 

 liams). 



Eriophorum vaginatum L. Dawson ; below White Horse 

 Rapids ; Klondike River Bottom (Williams) ; Five-finger 

 Rapids (Tarleton). 



Carcx vcsicaria L. Dawson ; Klondike River Bottom 

 (Williams). 



