b. Empty glumes 3- to 7-nerved. 
* Apex of the flowering glume obtuse or truncate. 
opyron campestre Godr. Ag ES ., Fl. Fr. 3: 607. Sparingly introduced as a 
ballast plant at Camden, N. 
Agropyron glaucum Roem. & zt hult., Syst. 2: 752. Triticum glaucum Desf.; 
intermedium Host. Sparingly trnd as a ballast plant, New Jersey id 
Connectieut. 
** Apex of the flowering glume acute or acuminate. 
t Spikelets much pasear distichous in two parallel planes so that the spike is distinctly : | 
angled; rachis articulated, breaking up at maturity. 
Agropyron tetrastachys Scribn. & Smith, sp. nov. A maritime glaucous species 
with slender, erect, rigid culms, 2 to 3 si t high, spreading leaves, and pale 
greenish or stra aw-colored spikes. Culms striate, tía nodes brownish, gla- 
brous; sheaths striate, smooth, shorter. gen an the leaf Prades and internodes; 
ligule obsolete; deaf blades 4 or inear, long, attenuate-pointed, rigid, 6 to 8 
inches long, 2 lines or less wide, o on the back, scabrous on E. margins, 
closely striate-nerved and glaucons above, 8 scabrous along the nerves. Spikes 
angles; spikelets 15 to 20, 7- to 11-flowered, 6 to 10 lines long, 34 to 5 lines wide, 
parallel to the rachis and pe A one another; empty glumes about equal, 
lanceolate. and mucronate pointed, the lower 3-, the upper 5- to 7-nerved, about 
5 lines long, carinate toward the apex, smooth, excepting along the keel; flow- 
ering glume lanceolate, acute, keeled, mucronate or tipped with a "iet awn, 
scabrous above the middle; palea as long as its glume, acute; internodes of the 
rachilla very short and ad. Allied to A. bae m (Pursh.). 
Y Sandy pond Cape Elizabeth, Me. Specimens in the National Herbarium 
eolleeted by F. L. Seribner, July 26, 1895. Gray opi Tuckerman, 
August, 1860, Mad Elizabeth. 
t t Spikes not distinctly 4-angled, rachis continuous. 
t Flowering glume tipped with a geniculate divergent awn. 
Agropyron albicans Scribn. & Smith, sp. nov. Stoloniferous perennial with bluish- 
green leaves and much compressed, pubescent, distant spikelets, with geniculate 
divergent awns. Culms slender, erect, 1 to 2 feet high, glaucous, clothed at the 
base wit 
long-exserted, y nodding, 3 to 4 inches long, of 8 to 10 To spike- | " 
ered, 8 to 9 lines long, distant on the rachis, ascending or erect; 5 
empty glumes half to two-thirds as long as the spikelet, dec dee at the base, 
broadly 3- to 5-nerved, pubescent, oblauceolate, acuminate, tipped with an awn 
2 to 3 lines long; flowering glumes 4} lines long; ovate sided rounded on 
the back, densely pubescent, tipped with a stout, scabrous, divergent awn 6 to 
8 lines long; palea as long as its glume, bidentate; internodes of the rachilla 
bescent. Collected by od P. A. Rydberg at Yogo Guleh, Montana, altitude 
5,000 feet (No. 3405), August 22, 1896. 
Closely related to 4. „ and 4. spicatum molle, from both of which 
it is separated by the divergent geniculate awns of the flowering v The 
spike has a whitish aspect, hence t hes specific name. 
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