106 RypDBERG: STUDIES ON THE Rocky MOUNTAIN FLORA 
Iregard the subgenus Hesperochloa of Festuca, proposed by 
Piper, as representing a distinct genus and here propose it as such. 
HESPEROCHLOA (Piper) Rydb. gen. nov. 
Festuca subgenus Hesperochloa Piper, Contr. U.S. Nat. Herb. 10: 
10. 1906. 
Densely tufted dioecious perennial, occasionally stoloniferous. 
Inflorescence a narrow panicle. Spikelets turgid, 3-5-flowered; 
rachilla scabrous on the basal half. Empty glumes 2, broadly 
lanceolate, subscarious, shining, the lower 1-nerved, the upper 
3-nerved. Floral glumes ovate, acuminate, rounded on the back, 
faintly nerved. Petals scabrous-ciliate on the keels. Styles obso- 
lete; stigmas hispidulous on all sides, not plumose; ovary deeply 
sulcate near the apex, sparsely hispidulous; grain beaked and 
bidentate at the apex. 
Hesperochloa Kingii (S. Wats.) Rydb. comb. nov. 
Poa (?) Kingit S. Wats. Bot. King Exped. 387. 1871. 
Festuca confinis Vasey, Bull. Torrey Club 11: 126. 1884. 
Festuca Kingit Scribn. U.S. Dept. Agr. Agrost. Bull. 5: 36. 1897: 
Not Festuca Kingiana (Endl.) Steud. 1855. 
Festuca Watsonu Nash, Britt. Man. 148. Igot. 
This was originally described as a doubtful Poa and afterwards 
transferred to Festuca because the floral glumes are rounded on 
the back. There are, however, certain characters in the stigmas 
and the grains that make it fit poorly in either genus. In both Poa 
and Festuca the stigmas are plumose, that is, the branches are 
spreading bilaterally, while in Hesperochloa the short bristlelike 
branches stand out in all directions, a condition rather rare among 
the grasses. 
Hordeum caespitosum Scribn. is found locally throughout the 
range, H. montanense was described from Montana, H. murinum 
and H. Aegiceras have been introduced and are locally established, 
especially in Utah. 
Sitanion Raf. is a very perplexing genus, and it is very doubtful 
if the many species proposed by J. G. Smith can be upheld. It is 
evident that S. longifolium and S. brevifolium are but local forms 
of one species, depending on the amount of moisture. As this 
species is the only one found anywhere near the type locality of 
