900 
Journal of Agricultural Research voi. xxvn, no. 12 
This division of the sagebrush association has been given first place in 
the series, since it is the highest in altitude of the three divisions and most 
closely related in respect to both physical conditions and vegetation to 
the preceding associations, grouped under the general term of “ Stansbury 
Mountains at higher altitudes.” 
The following determinations (Table II) were based on collections 
made along the lower course of Box Elder Creek. 5 
Table II .—Physicochemical constants for species of the sagebrush association of the 
foothills canyons 
Freezing 
point 
depres¬ 
sion, 
A. 
Atmo¬ 
spheres 
osmotic 
concen¬ 
tration, 
P. 
Specific 
electrical 
conduc¬ 
tivity, 
K. 
Ratio, 
conduc¬ 
tivity to 
depres¬ 
sion, 
K/A. 
Chlo- 
rids 
per 
liter. 
Cl. 
1.20 
14.4 
O.OI47 
O.OI23 
0.8 
I *S 7 
18.8 
.0156 
.OO99 
1.8 
i -39 
16.7 
.0163 
.0117 
O. I 
2.34 
28.1 
.0148 
.0063 
0.8 
o -95 
n -5 
.0219 
.0230 
2. r 
1-05 
12.6 
.0208 
.OI99 
3-8 
1.04 
12.6 
.0205 
.0197 
3 -i 
1.86 
22.4 
.0258 
.0138 
1.08 
13.0 
.0259 
.0240 
4.1 
2.08 
25.0 
•0357 
.0172 
5 -i 
1.23 
14.8 
.0194 
.0158 
6.9 
1.26 
I 5 - 1 
•0153 
.0122 
2.8 
2.07 
24.8 
.0176 
.0085 
3-8 
1.67 
20.0 
.0164 
.OIO3 
3-3 
1.04 
12.5 
.0170 
.0164 
3*0 
1.21 
14.6 
.0186 
•0153 
3-7 
1.11 
i 3-3 
.0254 
.0230 
3 -o 
1.21 
14-5 
•0235 
.OI94 
4.1 
1.11 
*3 *3 
.0256 
.0232 
5-2 
0.83 
10.0 
.0192 
.0231 
2.7 
0.89 
10.7 
•0233 
.0263 
2.7 
1.01 
12.1 
.0174 
•0173 
1.82 
21.9 
.0274 
.0150 
4.9 
1.40 
16.8 
.0283 
.0202 
1.23 
14.8 
.0203 
.Ol 66 
3*3 
1.05 
12.7 
.0236 
.0224 
0.81 
9-7 
.0188 
.0232 
2.7 
0.72 
8.7 
.0187 
.0260 
0.71 
8.5 
•0173 
.0244 
3-2 
0.86 
10.3 
.0207 
.0241 
2.6 
1.02 
12.2 
.0221 
.0218 
3*4 
1.32 
15-8 
.0210 
.OI59 
2.2 
Growth form and species. 
TREES AND SHRUBS 
Acer interim Britton. 
Ribes inebrians Lindl. 
Sambucus coerulea Raf. 
Symphoricarpos oreophilus A. Gray. 
PERENNIAL herbs 
Agastache urticifolia (Benth.) Rydb. 
Artemisia dracunculoides Pursh. 
Artemisia ludoviciana Nutt. 
Castilleja linarieafolia Benth. 
Cirsium lanceolatum (L-) Hill. 
Elymus condensatus Presl. 
Eriogonum elatum Dougl. 
Eriogonum subalpinum Greene. 
Date. 
1920. 
July 16 
. .do. 
. .do. 
July 28 
& 
Average. 
Geranium viscosissimum Fisch. 
Mey. 
Hedysarum pabulare A. Nels. 
Lappulafloribunda (Lehm.) Greene 
Lithospermum torreyi Nutt. 
Marrubium vulgare L . 
Pachylophus marginatus (Nutt.) 
Rydb. 
Rumex crispus L. 
Scrophularia occidentalis (Rydb.) 
Bickn. 
Solidago pumila . 
Spkaeralcea rivularis Torr. 
Vagnera stellata (L.) Morong. 
BIENNIAL HERBS 
Mentzelia acuminata (Rydb.)...... 
Oenothera sp... 
Oenothera hooketi Torr. & G. 
Oenothera strigosa (Rydb.) Mack. 
& Bush. 
ANNUAL HERBS 
Lactuca scariola L. 
Urtica breweri S. Wats.... 
Urtica gracilis Ait. 
July 
. .do. 
. .do. 
. .do. 
. .do. 
. .do. 
. .do. 
. .do. 
July 
16 
28 
July 
July 
July 
. .do. 
. .do. 
16 
17 
16 
do. 
do. 
. .do. 
July 
July 
. .do. 
28 
16 
July 16 
...do.... 
.. .do_ 
do. 
July 16 
.. .do.... 
...do_ 
6 Unfortunately the sagebrush itself was omitted from the two collections made in this habitat. 
