6 
genus. To be sure there are species so closely connecting Elymus with 
Sitanion that it is difficult to determine to which genus they ought to 
be referred, but the same is true in the case of Elymus and Agropyron; 
there are e which may with equal propriety be placed 
either in the one genus or the other. 
That there are forms connecting Sitanion with Elymus S their 
close relationship, but this fact does not afford sufficient reason for 
uniting them, and the paper here presented, describing the many 
species into which Sitanion may be divided, affords good evidence and 
ample justification for its separation. 
- F. LAMSON- SCRIBMER. 
