54 
Throughout the Rocky Mountain region. It is No. 1986, C. 
Wright; 806, M. E. Jones; 3177, J. G. Lemmon, etc. Mr. 
Lemmon found a form which he says grows in ring-like patches. 
AGROSTIS DEPRESSA, V.—Culms decumbent and geni- 
culate at the base, becoming erect, 6 to 10 inches high, slender, 
leafy below; leaves short and narrow, plain, 1 to 2 inches long, 
¥% line wide, acute; ligule conspicuous, about 1 line long, ob- 
tuse and ciliate at apex; sheaths smooth, striate, the lower ones 
loose; panicle narrow, I to 2 inches long, or in age broader and 
more spreading; the branches short, variable in number, 2 to 5 
at the lower joints and unequal; pedicels scabrous, about as long 
as the spikelets; empty glumes nearly equal, about 1 line long, 
ovate-lanceolate, acute, roughish on the keel above; flowering 
glume one-third shorter, narrowly oblong, obtuse or minutely 
dentate at the apex; palet narrow, half as long as its glume. 
Collected in Clear Creek Canon, Col., by H. N. Patterson, 1885. 
AGROSTIS EXARATA, var. STOLONIFERA, V.—Caspitose ; 
culms 8 to 12 inches high from a. decumbent base, with 
numerous short leaves, which are seldom more than an inch 
long, narrow, acuminate ; the radical leaves also short and abun- 
dant; ligule membranaceous, conspicuous, obtuse; panicle 114 to 
2 inches long, purplish, narrow; branches very short and clus- 
tured, mostly flowering to the base, some of the lowest longer 
and naked below; spikelets about 1 line long, sometimes two- 
flowered ; empty glumes nearly equal, acute, hispid on the keel ; 
flowering glumes one-third shorter, oblong ovate, toothed at the 
apex, sometimes with a short awn, palet small, equaling the 
ovary; long leafy stolons, sometimes a foot long, are often 
emitted from the base, the joints I to 2 inches apart. Bottom 
lands of the Columbia River, collected by Mr. W. N. Suksdorf. 
Perhaps a good species. 
AGROSTIS EXARATA, var. LITTORALIS, V.—Culms erect 
from a creeping rhizome, I0 to 16 inches high, stout, with about 
four nodes; leaves erect or appressed, rather rigid, the upper 
one near the panicle, varying from 2 to 4 inches long, about 
1 line wide below, narrowed to a long point, scabrous on the 
margins, ligule conspicuous, obtuse, membraneous; panicle rig- 
idly erect, narrow, lanceolate, densely flowered, the branches un- 
