Rvdberg: Rocky Mountain flora GOl 



'^Muhlenbergia Thurberi Rydb. 



Sporobohis filic7dims 



Vilfa fih 



Jiliculmis Dewey. 1894. 



1896. 



filindmis Vasey and Vilfa jiL 



appeared in 1885 in Vasey's Catalogue o^ the Grasses of United 

 States, on page 44 ; but both are there noniina nuda and the first 

 place where a description is published \s, as far as I can find, \w 

 Beal's Grasses of North America. In the meantime Dewey had 

 published another Sporobohis fitcu/mis which invalidates that 

 specific name. 



'^Sporobolus flexuosus (Thurber) Rydb. 



Sporobohis cryptandnis fiexnosus Thurber ; Vasey, Bot. Wheeler 

 Surv. 282. 1878. 

 This is evidently specifically distinct from 5. cryptandnis. 



^ 



Deschampsia alpicola Rydb. sp. nov. 



Deschampsia caespiiosa alplna Vasey ; Beal, Grasses N. Am. 2 : 



368 ; at least in part, 1896. Not D, alpma R. & S. 1 8 17. 



Densely cespitose, tufted perennial ; sterile shoots numerous ; 

 sheaths 2-3 cm. long, glabrous, striate ; ligules linear-lanceolate, 

 acuminate, about 5 mm. long; blades 1-2 dm. long, 1-2 mm. 

 wide, stiff, often more or less involute; culm-leaves with sheaths 

 1-1.5 dm. long and blades 1-4 cm. long; culms 3-5 dm. high; 

 panicle short, open, 8-15 cm. long, its branches in 2's to 5's„ 

 Z-^ cm. long, soon spreading ; spikelets about 5 mm. long ; 

 empty glumes about 4 mm. long, lanceolate, acute ; flowering 

 glume nearly as long, hirsute at the base ; awn attached one third 

 or one-fi3urth from the base, one and a half to two times as long: 

 as the glume, bent and twisted. 



This differs from D, caespiiosa in the large flowers and the long 

 awns. It has been mistaken for D, bottnica, but that species has 

 long narrow inflorescence and comparatively longer empty glumes. 

 D. alpicohi is rather common in alpine regions of Colorado. A 

 similar if not identical form Is also found in Alaska. As the type 

 may be designated : 



Colorado: Mountain meadows, Pike's Peak, Sept. 4, 1901. 



M. Undcnvood XX. 



