Rydberg : Rocky Mountain flora 539 



mens were originally referred. B. Flodmanii differs from B. 

 tnarginatus latior in the scabrous, not pilose floral glumes, and the 

 narrow inflorescence ; from B. aleutensis it differs in the shorter 

 awns, the smaller florets, and the less open inflorescence, and from 

 B. Hookerianus in the smaller spikelets, shorter awns, and narrower 

 scarious margins of the floral glumes. It agrees very well with 

 the description and figure of Ceratocfdoa breviaristata Hook., but 

 the palet is nearly as long as the floral glume. 



Montana : Sheep Creek, Aug. 8, i 896, /. II Flodman 18 J 

 (type, in herb. N. Y. Bot. Gard.) ; same locality and date, Rydberg 



33o8. 



Utah : Mount Nebo, 1905, Rydberg & Carlton yspj- 

 Wyoming: Buffalo Fork, 1897, F. Tweedy 6 j. 



Agropyron latiglume (Scribn. & Smith) sp. nov. 



Agropyron violaceum latiglume Scribn. & Smith, U. S. Div. Agrost. 

 Bull. 4 : 30. 1897. 



Agropyron inerme (Scribn. & Smith) sp. nov. 



Agropyron divergens inermis\e\ Scribn. & Smith, U. S. Div. 

 Agrost. Bull. 4 : 27. 1897. 



Hordeum depressum (Scribn. &. Smith) sp. nov. 



Hordeum nodosum depressum Scribn. & Smith, U. S. Div. Agrost. 

 Bull. 4 : 24. 1897. 



Elymus jejunus (Ramaley) sp. nov. 



Elymus virginicus jejunus Ramaley, Minn. Bot. Stud. I: 114. 



1894. 

 Elymus virginicus minor Vasey ; Rydb. Contr. U. S. Nat. Herb. 



3: 193. 1895. 



This was well described by Professor Ramaley. The descrip- 

 tion was overlooked when I a year later took up Dr. Vasey's 

 manuscript name. 



Elymus marginalis sp. nov. 



Perennial, with a rootstock, somewhat tufted ; stem 6-10 dm. 

 high, glabrous or pubescent at the nodes ; sheaths close, at least 

 the lower ones retrorsely pilose ; leaf-blades spreading, 1-2 dm. 



