16 
States in which a dozen or more separate species occur. Rafinesque apparently 
left no type, and the original description is too fragmentary to enable one to 
more than guess at the identity of the plant which he described. 
13. SITANION CZESPITOSUM J. G. Smith, sp. nov. 
Densely cwspitose, with flat leaves, and weak, ascending rows 8 EA 
very leafy, erect or spreading, 1 to 2 dm. long. Culms 2 to 3 . high, ve 
slender, terete, glabrous. Nodes glabrous. Sheaths striate, open p the duse 
smooth and glabrous. Ligule membranaceous, entire, very short. Blades 4 to 
10 cm. long, 2 to 3 mm. wide, linear, ; or the margins incurved, prominently 
7-nerved dete glabrous on the peeks Mobius above. Spike 4 to 6 cm. long, 
its bas» sometimes inelosed in the uppermost sheath, mostly exserted, somewhat 
NE. Empty glumes entire or bifid, 3 to 4 em. long 5 piss rous. 
Flowering glume of the lowest fertile floret linear- e entire, smooth and 
shining below, sparsely scabrous above the middle, about 7 mm. ‘aie tipped 
with a flexuous scabrous awn, about 5 mm. long. Callus rounded, glabrous. 
Palea as long as the flowering glume, rounded at the apex. Joints of the rachis 
glabrous, except along the margins, not at all dilated above, two-thirds the 
t. 
Growing in rieh soil in the canyons around silver City, N. Mex 
yfy pe specimens collected by Jared G. Smith, near Cliff, N. Me. August 19, 1897. 
Also collected at the' same loeality in August, 1896. It grows only in shaded 
canyons, and bay moist ae slopes in the mountains at an altitude of about 
000 m. Its green during the winter. It is one of the“ mutton 
cm? 5 abundant and highly valued as forage for sheep and cattle, 
now to be found only in protected situations. Probably also occurring in the 
mountains of western Texas, although there are no ncn from any other 
locality than the typical one in the National Herbar 
Closely related to S. hystrix (Nutt.) JGS., but the Sheet: 5 5 plades are glabrous 
on the back. 
14. SITANION MONTANUM J. G. Smith, sp. nov. 
Culms rather stout, erect, 2 to 4 dm. high, terete, RE glabrous below, scabrous 
above. Sheaths rather loose, open at the throat, as long as, or longer than, the 
internodes, smooth, scabrous or pubescent. Blades 5 to 10 em, long, 3 to 4 mm 
strigose-pubescent on the prominent nerves above, scabrous along the margins, 
wned, some of those in the lower part of the spike unequally bifid, the lobes 
extending into scabrous, divergent awns 5 to 6 em. long, 2 or iis 3 spikelets 
at each node. Lowest floret sterile. Flowering glumes 10 to 11 mm. long, 
linear-lanceolate, rounded on the back, smooth and shining for the lower third, 
scabrous above and on the margins, trifid, three-awned, the scabrous, divergent 
middle awn 4 to 7 cm. long, the lateral awns very short, slender. Palea as long 
as the flowering glume, with two short, setaceous, scabrous awns, or sometimes 
rather obtuse and muticous. Internodes of the rachis linear or dilated above, 
compressed, glaucous, 4 to 6 mm. long. 
S. montanum differs from S. strigosum in the shorter, flat, and more rigid erect leaves 
oother flowering glume. This may be ue's S. elymoi 
Northern Wyoming and Montana to Oregon. SPECIMENS EXAMINED: Montana: F. 
n-Seribner, No. 437, gravelly bottoms, — ege July 4, 1883; rather 
densely cinereous-pubescent throughout. P. , No. 3091 (type a 
Creek, July 15, 1896; and No. = Spanish n eiiis 18,1896. Tho 
Williams, No. 2002 2002, Spanish C k Basin, July 16, 1896, on sterile, aec soil. 
Wyoming : 3 Williams, "E 2776, Bull Camp, August 2, 1897; No. 2596, 
Ten - m Big Horn Mewutains,. August 19, 1897. 
