GENERA OF GRASSES OF THE UNITED STATES. 
147 
reduced in M. schreheri (fig. 82), the type species, the first being 
obsolete and the second not over 0.5 mm. long. In M. montana 
(Nutt.) Hitchc. (C dly coclon montanum Nutt. ; Muhleribergia trifida 
Hack. ; M. gracilis 
of authors, not 
H. B. K.) the sec- 
ond glume is 3- 
toothed. Muhlen- 
bergia capillaris 
(Lam.) Trin. (fig. 
83) , of the South- 
ern States, is a 
handsome peren- 
nial with diffuse 
purple panicles. 
There are nine 
species in the 
Eastern States; 
the others are 
western or mainly 
southwestern. 
Many of the west- 
ern species a r e 
important range 
grasses and often 
form a consider- 
able proportion of 
the grass flora of 
the arid and semi- 
arid regions. The 
c o m m onest of 
these are M. mon- 
t a n a a n d M . 
wrightii V a s e y. 
The second has a 
spikelike leaden- 
hued panicle. 
Fig. 82. — Nimble Will, Muhleribergia schreberi. Plant, X i ; branchlet showing both first 
ana second glumes of two spikelets, spikelet with obsolete first glume, and floret, all 
X 5. 
