FLORA OF THE YELLOWSTONE NATIONAL PARK. 33 



Astragalus alpinus, L. 



Common throughout grassy jilaces and open woods, from 6C00-9500 

 ft. alt. 



Astragalus Missouriensis, Nutt. 



Dry rocky hills, mouth of Gardiner River, 5G00 ft. alt. 



Astragalus Purshii, Dougl. 

 With the preceding. 



Astragalus triphyllus, Pursh. 



With A. PursMi. The last three sjiecies not observed elsewhere in 

 the Park. 



Astragalus frigidus, Gray, var. Americanus, Watson. 



Grassy borders of streams and open woods. Blacktail Deer Creek, 

 7300 ft, alt. ; Soda Butte Creek, 7800 ft. alt. Rather rare. 



Astragalus campestris, Gray. 



Border of pine woods. Very common from 6000-8000 ft. alt. 



Astragalus multiflorus, Gray. 



Dry bench lands. Blacktail Deer Creek and j\It. Evarts, 7200-7800 

 ft. alt. ; Soda Butte Creek, 8000 ft. alt. ; Cache Creek, (>700 ft. alt. 



Astragalus tegetarius, Wats. 



Mammoth Hot Springs, 6200 ft. alt. 



Astragalus tegetarius, Wats., var. implexus, Canby. 



Bare rocky slopes and summits. Sepulchre Mt., 8600 ft. alt. ; ]\It. 

 Washbume, 10,000 ft. alt. 



Oxytropis deflexa, D. C. 



Meadows along Blacktail Deer Creek, 7300 ft. alt. ; Mt. Washburne, 

 10,000 ft. alt. (a dwarf, stemless form, with leaves an inch and leaflets 

 2-3 lines long). 



Oxytropis viscida, Nutt. 



Grassy slopes and summits of Specimen Ridge and Amethyst Mt., 

 8500-9000 ft. alt. 



Oxytropis lagopus, Nutt. 



Common throughout. Bare rocky hills, Gardiner, 5 00 ft. alt. ; Mt. 

 Washburne, 9800 ft. alt. 



Oxytropis Lamberti, Pursh. 



Common from 5800 ft. alt. to alpine. Mouth of Gardiner River, 

 5400 ft. alt. ; Mt. Holmes, 10,000 ft, alt, 

 3 



