35 
— 
and scarious on the margins; flowering glumes linear-oblong, acuminate or awn- 
pointed, rounded on the back, 5-nerved, scabrous; palea shorter than its glume; 
internodes of the rachilla short, minutely scabrous 
This is Agropyron repens of most American lt and manuals, but not of 
Linn:eus. The latter is European, and is not found indigenous in this country 
xcept along the New England coast. A. pseudorepens may be distinguished by 
tho harsher leaves, which are scabrous on both sides, more prominently nerved, 
and involute when dry; the Jonger, narrower, and more rigid leaves of the inno- 
vations, and narrower and more erect spikelets; the flowering glumes very 
rarely awned. 
Texas and Arizona to Nebraska, Montana, and British Columbia. Specimens 
in the National Herbarium from Texas; Nealley, 1889. Arizona: 3193 Lemmon, 
1884, Colorado: G. H. French, Lake Ban ch, im Triticum repens compactum 
Ww 
W in part, and Triticum repens acutum Vasey, in part; 1166 J. Wolfe, 1873; 
437 M. E. Jones, 1878, Triticum repens acutum Vasey, in part; 120 C. S. Crandall, 
I oe 15 Patterson, peur. 2488 Rydberg, 1895; 621, 649, im Shear, August, 
1895. Wyoming: V. ermann, Casper, 1893; 224 J. N. Rose, Yellowstone 
Park, 1893. n 4 111 . J. Webber, 1889; 2603 Clements, June, 1893; 
212 Bheirt, Kearney, 1895; 2018 on um Kearney, 1895, South Dakota: Geyer, 
2 
bu 
1839. North Dakota: Seymour, 1884. Minnesota: F. L. Wood, July, 1889. 
Ontario: John Macoun, July, 1884. British 5 10 John Macoun, 1890, 
Deer Park. Montana: 424 F. L. Scribner, 1893; L. F. Ward, 1885; 340, 383, 411 
ro Shear, 1895; 2 088 Rydberg, 1895. Nevada: 236, 8. “4 pode, 1887. Washing- 
: 2134 Henderson, July, 1892; 1910, Piper, July, 1894 
eras pseudorepens magnum Scribn. & Smith, var. nov. Robust,3 to 4 feet 
high; leaves 8 to 12 inches long; spikes 6 to 8 inches long, one-sided ; spikelets 
A . ea acute, 1 inch long. 
pe specimen collected by P. A. Rydberg, 2401, Enterprise, Colo., August 19, 
1895; also by Sandberg, Leiberg, and MacDougal, 556, south shore of Lake Coeur 
dim, Idaho, July 5,1892. Possibly a good species. 
x x Empty glumes less than one-half as long as the spikelets. 
Agropyron riparium Scribn. & Smith, sp. nov. Glaucous, tufted, 1} to 2 feet high, 
with narrowly involute leaves and pubescent leaf sheaths, short crowded spikes, 
ms 
inches long, 2 lines wide or less, striate, scabrous throughout. Spike 2j to 4 
inches long, of 8 to 15 rather crowded 5- to 7-flowered, compressed, and spreading 
spikelets which are 5 to 6 lines long; empty glumes oblong-linear, acute, 3-nerved, 
2 lines long; flowering glume oblong-lanceolate, acute, glaucous, rounded on the 
back, seabrous toward the apex; palea shorter than its glume; internodes of 
the rachilla glabrous, flattened, about 1 line long. 
| J River banks, Montana, June and J uly. Founded on specimens collected in 1895 
; EN by P. A. Rydberg, 2127, Garrison; C. L. Shear, 369, Garrison, and 372, Deer Lodge. 
3. Leaves flat, smooth on the back, pilose on the nerves above, spikelets erowded. 
— eeann 
ee 
: Agropyron repens Beauv., Agrost., p. 102. A pernicious weed which has been exten- 
; sively naturalized throughout the United States. The introduced 4. repens ma 
be distinguished from the indigenous 4. pe by its flat green leaves, 
which are glabrous on the back, scabrous and sparsely hirsute along the nerves - 
above; distichous spikes and green tt ; 5 glumes; 
and short smooth internodes of the rachi ; 
ated in the National Herbarium! fro Maine to Vancouver 
Island, .. Virginia to Missouri. 
