12 
4. SITANION POLYANTHERIX J. G. Smith, new name. Polyantherix hystrix 
Nees, in Ann. Nat. Hist. 1: 284 (1838), not ZEgilops hystrix Nutt. 
Culms 3 to 4 dm. high, terete, striate, minutely strigose- siad Sheaths striate, 
scabrous, closely enveloping the internodes and longe them, hirsute. 
Ligule very short, membranaceous. Blades 6 to 25 cm. long, eae long-attenuate 
or filiform, involute, acuminate, the ie hirsute on the back, the upper smooth, 
scabrous and sparsely hirsute on the nerves above. Spike 7 to 10 cm. long, rather 
rigid and densely flowered. Spikelets 2 at each node; all the florets of one of 
the spikelets sterile and the lowest and uppermost florets of the other either 
staminate or sterile, only the second producing seed. Empty glumes 5- to many- 
parted from near the base, the segments extending into slender, abruptly divari- 
cate awns, 6 to 25 mm. long. Flowering glume of the hermaphrodite floret 
linear-lanceolate, acute, smooth and shining for its lower two-thirds, slightly 
scabrous above, with a rigid, scabrous awn 2.5 to 3 cm, long arising from between 
two minute teeth, Palea a little longer than the flowering glume, acute, inter- 
nie of the rachis very short, smooth and shining, compressed, broadest above, 
3 mm. long. 
vA Gen collected by Douglas, in California. There isa specimen in the National Herba- 
rium, labeled 1 pol 2 whieh was collected by Dr. J. M. Bigelow, 
surgeon and botanist to Lieut. A. W. Whipple's expedition for a railway route 
from the Mississippi River i the Pacifie Ocean, near the thirty-fifth parallel 
of latitude in 1853-54, 8 without locality, and it is from this plant that 
the above description is draw 
This species may be separated via S. breviaristatum, to which it is related, by the 
very long-attenuate, filiform leaves, and taller and more slender culms. 
5. SITANION BREVIARISTATUM J. G. Smith, sp. nov. 
Low e on perennial, with slender, erect spikes and very long,rigid, erect o 
cending leaves. Culms about 2 dm. high, erect, clothed with dead lasten 
many-pa ens Qe seabrous, flexuous, divergent awns, from * to 20 mm. long. 
Flowering glume abont 6 mm. long, narrowly lanceolate, smooth below, scabrous 
above, tipped with a ate 1 awn from 1 to 1.5 cm. lon 
the flowering glume, acute, 2- rved, scarious along the margins, bieuspidate. 
Grain adherent to the palea, elliptical, oblanceolate, 5 inm. long, compressed, 
acute at the dier: rounded at goa . Internodes of the rachis compressed, 
5 , Spatnlate above, glau 
Type ee „ by Coville and 8 No. 833, Willow Creek Canyon, 
Panamint Mountains, California, May 22, 1891. 
This on differs from Sitanion multisetum to which it is related, in the low, densely 
tose habit; short, slender spikes; and very short awns of the empty and 
"prope dividi The bases of the culms are clothed with papery leaf-sheaths. 
$$ Busitanion. Lowest floret of one or both spikelets sterile and like the empty der 
some of the empty glumes baa from about the middle, the divisions divergent; 
others entire, subulate-setace 
. 6. SITANION MINUS J. G. Smith, sp. nov. 
pee 1. 5 to 2 dm. high, slender, rigid, erect, terete, glabrous. Nodes glabrous. 
m leaves 5. Sheaths glabrous, closely enveloping and longer than the inter- 
du Ligule almost obsolete. Blades 5 to 7 em. ., those of the innovations 8 to 
12 em. long, rigid, erect o: r somewhat N linear, 3 involute, 
smooth and glabrous on the back, scabrous on rigose-pubescent on 
the nerves above. Spikes 3 to 5 em. Jong, Hl their los foctüded in the 
