668 Rydberg : Astragalus and its segregates 



17. OROPHACA (T. & G.) Britton, Man. 555. 1901. 

 Besides 0, sericea (Nutt.) Britton, the following are found in 



Colorado : 



Orophaca tridactylica (A. Gray) Rydb, 



Astragalus tridactyliciis A. Gray, Proc. Am, Acad. 6 : 527. 1866 



Orophaca aretioides (Jones) Rydb. 



Astragalus sericoleiicus aretioides Jones, Cont. West. Bot. 8; 13 

 1898. 



New York Botanical Garden. 





