17 
Idaho: B. W. Everman, No. 319, shores of Petit Lake, August 13, 1895, 
Oregon: A fragmentary specimen collected by the U. S. South Pacific Exploring 
Expedition, under the command of Captain Wilkes, 1838-1842, is doubtfully 
referred here." 
15. SITANION STRIGOSUM J. G. Smith, sp. nov. 
Culms stout, erect, 3 to 6 dm. high, terete, striate, glabrous, the uppermost inter- 
nodes minutely pubescent. Nodes brownish, glabrous. Sheaths open at the 
lower ones involute, rounded at the base, long-acuminate pointed, strongly 
nerved, strigose-pubescent throughout, sparsely hirsute along the nerves, sca-. 
brous on the cartilaginous margins. Spike stout, erect, exserted, 8 to 12 em. 
the back, scabrous and glaucous, strongly 3-nerved above, the middle awn stout, 
recurved, scabrous, 5 to 7 em. long, the lateral ones 1 to 2 mm. long. Palea 
nearly as long as the flowering glume; bifid, with two short awns, ciliate along 
the nerves above. 
"Type collected by P. A. Rydberg, No. 3298, Sheep Creek, Montana, August 8, 1896. 
Also collected by Charles A. Geyer, June 10, 1839, “in heavy ferruginous loam, 
Missouri, James and Shienne River valleys," probably at the eastern border of 
the Bad Lands, above Mandan, N. Dak. | ; : 
S. strigosum differs from S. montanum in the very long, less rigid, more strongly 
nerved culm leaves, the uppermost nearly as long as or much exceeding the 
spike, those of the innovations half the length of the culm. The flowering 
umes are more scabrous and shorter. This may be Rafinesque's S. elymoides. 
16. SITANION MOLLE J. G. Smith, sp. nov. 
Culms stout, erect, rigid, 3 to 4 dm. high, clothed at the base with dead leaf-sheaths, 
terete, striate, pubescent. Innovations about half as long as the culm. Nodes 
pubescent, the lower ones sparsely hirsute along the nerves, the upper puberu- 
empty glumes. Flowering glume of the lowest hermaphrodite floret linear- 
lanceolate, acute, 1 em. long, smooth and shining, glaucous, trifid, or entire, 
tipped with a stout, spreading, scabrous awn 5 to 7 em. long. Palea as long as 
the flowering glume, acute, or bicuspidate scabrous along the nerves. i 
“Type collected by Shear and Bessey, No. 1469, East Side Buffalo Pass, Larimer 
County, Colo., moist, open mountain side, 3,200 m. August 14, 1898, r 
S. molle is related to S. montanum. It differs in being finely pubescent throughout. 
The leaves are longer and less strongly nerved. 
$$$ Hordeiformae. Lowest floret hermaphrodite. Empty glumes 4, entire. 9 032 
17. SITANION BREVIFOLIUM J. G. Smith, sp. nov. Pl. III. 2494 
Culms 3 to 6 dm. high, terete, stout, erect, obscurely striate, glancous. Innovations 
less than half the length of the culms. Nodes glabrous. Sheaths smooth, 
scarious along the margins, glaucous, longer than the internodes, the uppermost 
much elongated, the lower sometimes pubescent or hirsute. Ligule almost 
20775—No. 18——2 
