FLORA OF THE YELLOWSTONE NATIONAL PARK. 35 



Potentilla glandulosa, Lindl. 



Rather common, generally in dry and rocky places. Mirror Lake 

 Plateau, 8600 ft. alt. ; Open woods Mammoth Hot Springs, 6400 ft. alt. ; 

 Upper Falls of the Yellowstone (Adams). 



Potentilla Norvegica, L. 



Mud Springs and Upper Falls of the Yellowstone (Adams). 



Potentilla rivalis, Nutt., var. millegrana, Watson (P. millegrana, Engelra.). 

 Sandy bluffs and shores of Yellowstone Lake, 7740 ft. alt. 



Potentilla palustris, Scop. 



Shoshone Lake (Forwood). 



Potentilla Plattensis, Nutt. 



Grassy summits of Specimen Ridge and Amethyst Mt., 8500-9400 ft. 

 alt. ; Mt. Washburne, 9800 ft. alt. ; Stinkingwater Pass (Parry). 



Potentilla dissecta, Pursh (P. diversifolia, Lehra.). 



Meadows and alpine slopes, from 6500-10,000 ft. alt. Common, and 

 varying much in size according to elevation. 



Potentilla gracilis, Dougl. 



Meadows from 7000-9000 ft. alt. Antelope Creek, 8000 ft. alt. ; 

 Yellowstone Lake, 7740 ft. alt. 



Potentilla gracilis, Dougl., var. flabelliformis, T. and G. 



Mammoth Hot Springs, 6400 ft. alt. ; Cache Creek, 7800 ft. alt. In 

 rather dryer situations than the last. 



Potentilla gracilis, Dougl., var. rigida, Watson (P. Nnttal/ii, Lehm.). 

 Hot Sulphur Springs (Adams). 



Potentilla fruticosa, L. 



Common in bogs from 7000-9000 ft. alt. 



Potentilla Anserina, L. 



Wet places. Delusion Lake, 7800 ft. alt. ; Mirror Lake, 8900 ft. alt. ; 

 Pelican Creek, 7800 ft. alt. ; Yellowstone Lake (Adams). 



Sibbaldia procumbens, L. 



Common on subalpine and alpine slopes and summits, but frequently 

 at much lower elevations. Rocky hills, Slough Creek, 6800 ft. alt.; 

 Rocks, Pelican Creek, 8000 ft. alt. 



Ivesia Gordoni, T. and G. 



Alpine and subalpine. Very common. 



