66 Muhlenbergia, Volume 9 
I have thought of this in looking over some specimens of 
Agoseris. When several of the newer species were added to the 
Colorado flora I was not well acquainted with them in the field, 
and could not judge of their merits. Further collecting has 
strengthened my belief in their validity as good species. I sup- 
pose because many of the species closely resemble each other 
that careful attention on the part of collectors has not been given 
them; but for this very reason more careful observation should 
be given them. 
Agoserts roseata Rydb. In the new Manual of Botany of 
the Central Rocky Mountains this is made a synonym of 7roa- 
zmon glaucum Nutt., but I do not regard it as so closely related 
to that species as are some others. The decidedly oblanceolate 
or spatulate leaves, scarcely at all glaucous, and the broad blunt 
bracts and roseate flowers easily separate it from A. glauca. It 
seems, too, to be a plant of the western slope, and I have it only 
from the type locality, “Bear river, twenty miles below Steam- 
boat Springs,” and from Red Cliff, in Eagle county. 
Agoseris agrestis Osterhout. After describing this I be- 
came doubtful of its standing. Forms which closely resemble 
A. glauca and A. Leontodon Rydb. have been referred to it, but 
probably should be placed with those species. It is certainly a 
close ally of A. glauca, but my collection of the past summer 
leads me to think that it is distinct. In A. glauca the bracts 
are narrow and nearly of: the same length, while I now regard 
A. agrestis as characterized by broader bracts of successive 
lengths. It seems to be a plant of middle elevations in the 
mountains, and is nuch less common than a A. glauca. 
Agoserts rostrata Rydb. This seems to be a thoroughly 
good species. I do not know A. arzzonica Greene, but bracts 
“all purple in the middle,” does not apply to our Colorado 
plants, and I suspect that “pappus fragi e and deciduous” is not 
particularly true of it. Wide and short outer bracts and nar- 
row elongated inner ones are characteristic of it. All of the 
specimens in my collection are from the eastern foothills, 
Windse or Jorado 
