0°. BOTANICAL GAZETTE. [July, 
(579.) PHALARIS ARUNDINACEA Linn. (Coulter’s Man- 
40). Bogs, Yellowstone Lake, rare. 
. (648.) HrerocHioa poreAuis R. & S. (Coulter, Man. 
406).—Mountain meadows from 8000 to 9000 ft. alt., not common. 
4, (591.) ALOPECURUS OCCIDENTALIS, n. sp.—“A pratensis, 
var. alpestris Wahl. (A. glaucus Less.) ex Gray,” Thurber in list 
Hall and Harbour’s Rocky Mountain plants. A. alpinus Por- 
ter and Coulter, Flor. Col. p. 251; Coulter, Man. p. 406 
A tall erect grass, usually glaucous throughout, with thick 
ovoid heads. Stems 60-90 em. (or, in very dry soil, 20-30 em.) 
high, erect, sheaths smooth or finely scabrous, much shorter than 
the internodes, loose, at least the upper ones, but not inflated. 
Ligule 1-2 mm. long. Leaves erect or ascending, 5-15 em. by 
4-7 mm., flat except at the cartilaginous and sharply pointed 
apex, smooth beneath, scabrous on the prominent nerves above. 
Panicle usually long exserted, sometimes partially enclosed in 
the upper sheath, 2-3 em. long and half.as thick. Spikelets 3.5- 
4.5 mm. long (usually about 4 mm.), the rather abruptly acute 
empty glumes equaling or slightly exceeding the obtuse flower- 
ing glume, which is scabrous and more or less ciliate near the 
tip. Awn about 6 mm. long, smooth and twisted below, more or 
less bent near the middle, scabrous above. 
Mirror Lake Plateau, alt. 8800 ft. Rather common in moun- 
tain meadows, associated especially with Phleum alpinum L. In 
similar situations in Montana this grass is not infrequent, some- 
times covering large areas to the exclusion of other species. In 
the mining regions it is cut for hay, for which purpose it is highly 
esteemed under the name of “ mountain timothy.” 
I have seen no specimens of Alopecurus glaucus Lessing, but 
our grass certainly does not agree with the diagnosis of that 
species given by Grisebach in Ledb. Flor. Ross. IV, p. 462, nor 
in all respects with that of Steudel in Syn. Gram. p. 150. It is 
a much taller plant than A. alpinus Sm., to which it is most 
nearly allied, and besides its glaucous color and more rigid foli- 
age, the hairiness of the glumes is less woolly in character, and 
the awn is always more developed. The true A. alpinus has not 
yet been found within our limits. The plant in question differs 
from A. pratensis in its shorter and more ovoid spikes, more 
hairy, less conspicuously nerved and shorter empty glumes, and 
in the comparatively shorter and more obtuse flowering glume- 
Alopecurus arundinaceus Poir. (A. ruthenicus Weinm., A. nigri- 
cans Hornem.), a species which our plant resembles in habit, 
has a more cylindrical spike, and differs especially in having the 
acute tips of the less hairy empty glumes curved outwards, and 
further also in the much shorter awn. 
2. 
ual, p. 
3 
