FLORA OF THE YELLOWSTONE NATIONAL PARK. 73 



Glyceria nervata, Trin., var. stricta, Scribn. 



Open bogs. Mammoth Hot Springs, 6 "200 ft. alt. (594). 



Glyceria aquatica, Smith. 



Upper Yellowstone Falls (Adams). 



Glyceria pauciflora, Presl. 



Rather frequent in open and wooded bogs from 7500-9000 ft. alt. 

 (267). 



Festuca ovina, L. 



Meadows and slopes from 7000-9000 ft alt. Very common, especially 

 alove 8000 ft. alt., in a great variety of forms. 



Festuca ovina, L., var. brevifolia, Wats. 



High alpine summits. Upi er East Foik, 10,700 ft. alt. (635). 



Festuca confinis, Vasey (Poa ? Kinr/ii, Wats.). 



Rocky open hillsides. Soda Butte Creek, 8500 ft. alt. (578). 



Bromus Kalmii, Gray. 



Rather common in rich meadows and open woods from 6.100 8500 ft. 

 alt. (266, 265, 538). 



Bromus breviaristatus, Buck). 



Common over the upper "bunch grass" areas and up to 8500 ft. alt. 

 (264). 



Bromus virens, Buckl. (('<-r<it(n-Jilo yr< unit flora, H. B. K.). 

 Open slopes. Soda Butte, 7000 ft. alt. (586). 



Bromus Pumpellianus, Scribn., ined. 



Dry open places on the borders of woods. Slough Creek and Soda 

 Butte Creek, 6000-7000 ft. alt. Not common (587). 



Bromus ciliatus, L. ? 



Shaded bogs and meadows from 6500-8.";00 ft. alt. (589). 



Agropyrum caninum, L. 



Common over the "bunch grass" areas (625). 



Agropyrum divergens, Nees. 



Common with the preceding (622, 623). 



Agropyrum tenerum, Vasey. 



Generally in more moist situations and at higher elevations than the 

 two preceding species (251). 



