PENTSTEMON GRANDIFLORUS 



By H. TuLLSEN. 



T X southwestern South Dakota the large-flowered beard- 

 tongue (Pcntstcmon grand iflorus) blooms for a short time 

 in spring and early summer. There are several other species of 

 Pcntstcmon that are in flower at this time, but, as the name avouM 

 suggest, grandiflorus is the most conspicuous of all, though, in 

 my opinion, hardly the most attractive. On the Pine Ridge 

 Indian Reservation, a tract 100 by 60 miles in area, I saw this 

 species along but one creek valley, ^ledicine Root, though P. A. 

 Rydberg found it at Hermosa, in the Black Hills region. 

 \\^here I observed it, it was growing in the Rosebud silt loam, 

 a calcareous soil. Unlike most of the other Pentstenious found 



