378 BOTANICAL GAZETTE [NOVEMBER 
(hb. Gray); Hacienda de Santiago, Zacatecas, communicated by Prof. A. 
Duges, June, 1904 (hb. Gray). 
The reported poisonous qualities of B. arniatera certainly raise a 
suspicion regarding the nearly related B. erecta, which is frequent in some 
grazing regions of our southwestern states where, in case of unexplained 
sheep-poisoning, it would be well for veterinarians to investigate the toxic 
effects of this p!ant—B. L. Roprnson, Gray Herbarium. 
SOME WESTERN SPECIES OF AGROPYRON, 
Agropyron spicatum Vaseyi (Scribn. & Smith), n. comb.—A. Vaseyt 
Scribn. & Smith, U. S. Dept. Agr., Div. Agros., Bull. 4:27. 1897. 
After a careful study of a large series of specimens I am disposed to regard 
A, Vaseyi as a depauperate form of A. spicatum. 
Agropyron subvillosum (Hook.), n. comb.—Triticum repens subvillosum 
Hook. Fl. Bor.-Am. 2:254. 1840. A. dasystachyum subvillosum (Hook.) 
Scribn. & Smith. U.S. Dept. Agr., Div. Agros., Bull. 4:33- 1897- 
Much field study of this grass has led me to regard it as a distinct species. 
With its slender culms and small spikelets it is certainly quite different in — 
ance from the stouter and larger-flowered A. dasystachyum and A. 
Often it is not at all glaucous, but quite green, and the flowering glumes -— 
sometimes merely scabrous. It is very common in this region, occurring om 
bench-lands and alkali flats. 
Agropyron Bakeri, n. sp.—A smooth cespitose perennial, with stout 
culms, 3-54™ high: leaves rigid, flat, prominently striate-nerved; oo 
leaves three, 12-20 © long, 2-4 ™™ wide, those of the innovations longer: 
spike g-12 °™ long, scarcely exserted, equaled or exceeded by the — 
most leaf; spikelets terete, 5-9 ™™ distant, 5-flowered, 15-19" long: 
empty glumes 11-12 ™™ Jong, two-thirds the length of the — s : 
nerved (the nerves scabrous), margins scarious, narrowly oblong, ange 
abruptly narrowed into an awn 2-8 ™™ long, and with or without a pi 
to one side at the base of the awn: flowering glumes scabrous ame pn 
smooth on the back, the strong midnerve extended into @ rigid w a 
spreading awn 10-35 ™ long, often bidentate below the origin of the av 
palea equaling or somewhat exceeding its glume: rachilla scabrous. ees 
Related to A. violaceum and A. Gmelini, but distinguished by its stout speci 
firm and strongly nerved leaves, and long widely spreading awns- ie 130 
men in the Rocky Mountain Herbarium, collected by C. F. BAKES poe 
near Pagosa Peak in southern Colorado, altitude 2750™ (gooo feet), 
1899.—E tas NELson, University of Wyoming, Laramie. 
