33 
t Flowering glume awnless, or with a straight awn. 
— Spikelets acute, compressed, diverging, the empty glumes as long as the spikelet. 
Agropyron spicatum Scribn. & posco nom. nov. Glaucous, 1 to 4 feet high, with 
compressed e^ xir we rigid, erect, striate With 3 or 4 e es and 
/// / Pn 
" 
short, often srl Binion erect, Spam set ai rigid, e e potes or 
slightly scabrous on the back, rough-scabrous on the margins a along the 
| prominent nerves above, becoming involute, 4 to 7 inches long, 2 to 3 lines wide, 
T those of the innovations narrower and often half as long as the um Spikes 
5 3 to 7 inches long. en . green, one- halt to 1 inch long, 
13-flowered, sp preadino ,lanceolate- 
e? 
Kin empty glumes lanceolate, linear, acuminate or awa: -poi inted, one-half o: 
two- dira as long as the spikelets, $cabrous on the nerves, slightly a 
often oblique; flowering glumes 4 to 6 lines long, narrowly lanceolate, acute, 
acuminate, mucronate, or awn-pointed, rounded on the back, smooth or thinly 
iie palea a little shorter than its glume, ionis along the margins 
——— ——— P] eee d 
above; —" of 85 rachilla cylindrical, very minutely scabrous. Festuca 
spicata Pursh, Fl. Am., Sept., Vol. I, p. 83; W missouricum Sprengel Syst. 
Veg., 325 5 Agropyron phoi occidentale Vasey & Scribn. in Macoun's 
Cat. Can. P 
| This is Tr dn ded and Agropyron glaucum of American authors, not R. 
& S. Closely related to 4. pseudorepens, from which it may be distinguished by 
broader, and more compressed spikelets.—Type in the Engelmann herbarium 
collected by Geyer, “Upper Missouri.” 
Common on n the prairies and high plains from Minnesota and Manitoba to Mis- 
souri and Texas, westward to Utah and eastern Oregon. Specimens from Colo- 
rado, Nebraska, and Kansas often have two spikelets at each node; forms with 
at the base with papery leaf sheaths, the whole plant sparsely or densely 
strigose-pubescent, spikelets more closely appressed. 
XM Mountains of Arizona and New Mexico. Specimens in the National Herbarium 
Ll n Palmer, 1869, without eee and 563, June, 1890, Willow Spring; 
3192 Lemm n, 1881, San Francisco Mounta New Mexico: 35 Rothrock, June, 
1875, Santa” Fe, and 103, July, 1874, Agua poe ; T 6,500 feet. 
; Agropyron spicatum molle Scribn. & Smith, var. nov. Like the species, but the 
empty and flowering glumes and the rachis more or less villose-pubescent. 
This is Agropyron glaucum of many collectors and A. glaweum pubiflorum Vasey, 
in part. 
The Saskatchewan to Colorado and New ds and westward to Idaho and 
Washington, but not so abundant as the speci 
| 
| 
Agropyron spicatum palmeri Scribn. & Smith, var. nov. Culms robust, clothed 
th 
| 
— — Spikelets erect, narrow, subcompressed or nearly cylindrical. 
= Flowering glumes densely pubescent or lanate. 
yron dasystachyum Scribn. Bull. Torr. Bot. Club 10: 78; Triticum repens 
dasystachyum Hook., Fl, Bor. Am, F: 204: T. HERE ER udi Gray, Manual, 602 
1848). 
Sand hills and dunes pem Manitoba to Michigan. Specimens in the National 
Herbarium from Mani : 109, 710 J. Macoun, 1879. Wisconsin: Lapham 
ee 56 and 155 Feels, 1887; Wheeler, 1895. 
Agropyron subvillosum Seribn. & Smith, n. n. More slender, Jess 
n dasystachyum 
glaucous, the innovations one-fourth to one-third as long as the culms; spike 
7298—No, 4——3 
