102 RypBERG: STUDIES ON THE Rocky MOUNTAIN FLORA 
arifolia Nutt.,* and S. arifolia tenuior is but a depauperate form of 
the same. Both S. paniculata Blank. and S. arifolia Nutt. have 
to give way for the older name S. cuneata Sheldon,t which was 
described from the deep-water form of the same species. 
POACEAE 
Blankinship reported Panicum nitidum Lam. from Columbia 
Falls, Montana. This must be an error, for that species is known 
only from the eastern seaboard from southern Virginia to eastern 
Texas. Aristida fasciculata Hookeri of Blankinship’s list is the 
same as A. longiseta. 
Professor Nelson reports Aristida oligantha from Colorado. I 
have seen no specimens from that state and none from west of 
central Nebraska. Perhaps A. bromoides might have been mis- 
taken for it. 
The oldest available specific name for Eriocoma cuspidata is 
hymenotdes, which is therefore adopted, and its name and synonymy 
is as follows: 
Eriocoma hymenoides (R. & S.) Rydb. comb. nov. 
Stipa membranacea Pursh, Fl. Am. Sept. 728. 1814. Not S. 
membranacea L. 1753. 
Stipa hymenoides R. & S. Syst. 2: 339. 1817. 
Eriocoma cuspidata Nutt. Gen. 1: 40. 1818. 
Oryzopsis cuspidata Benth.; Vasey, Special Rep. U. S. Dept. Agr- 
O63: 23... 108%, 
The following species of Muhlenbergia should be added to the 
flora of the Rocky Mountain region: M. pauciflora Buckl. (M. 
neomexicana Vasey; M. Pringlei Scribn.), M. polycaulis Scribn., 
and M. curtifolia Scribn., which were collected by Professor A. O. 
Garrett and myself in southeastern Utah last summer. Alope- 
curus fulvus Smith is not found in America, except perhaps in 
Greenland. A. aristulatus Michx. is not the same, differing not 
only in the general habit, not being depressed- geniculate, but also 
in the different position of the awn of the floral glume. Alopecurus 
pallescens Piper has been collected in both Idaho and Montana. 
*J. G. Smith. Rep. Missouri Bot. Gard. 6: 32. 1894. 
f Bull. Torrey Club 20: 283. 1893. 
