880 
Journal of Agricultural Research voi. xxvm, no. 9 
Table XIII .—Freezing point depressions and osmotic pressures of the sap of herbs 
on Ephraim Canyon watershed, central Utah, classified by species, type, situation, 
altitude, and date of collection 
[Figures in italics represent averages of two or more determinations] 
Species and type 
Situation 
Alti¬ 
tude 
Date 
of 
collec- 
! tion 
De¬ 
pres¬ 
sion of 
freez¬ 
ing 
point 
Os¬ 
motic 
pres¬ 
sure 
Achillea lanulosa Nutt. 
Degrees 
Atmos- 
Feet 
! 1921 
c. 
pheres 
Oak brush..... 
Northern aspect.. 
7,400 
July 19 
0.75 
9.0 
Do...... 
Sagebrush flat (under sage) 
7,400 
July 26 
1.82 
15.9 
Do...... 
Sagebrush flat (in open)... 
7,400 
...do. 
1.49 
17.9 
Spruce-fir..____ 
Southern aspect__ 
9,800 
July 12 
1.86 
16.4 
Aconitum columbianum Nutt. 
Spruce-fir_____ 
Northern aspect... 
10,000 
July 18 
0.88 
10.6 
Agoseris agrestis Osterh. 
Spruce-fir...... 
Southern aspect.... 
10,000 
July 18 
0.72 
8.7 
Agoseris sp. 
Spruce-fir__ _ 
Southern aspect. 
10,000 
July 18 
0.92 
11.1 
Agropyron dasystachyum (Hook.) Scribn. 
Spruce-fir ____ 
Southern aspect. 
10,000 
July 15 
1.67 
20.1 
Agropyron ripariumS. & S. 
Oak brush_ 
Sagebrush flat___ 
7,400 
July 26 
1.19 
14.3 
Agropyron violaceum (Hornem.) Lange 
Spruce-fir__ 
Southern aspect.. 
10,000 
July 14 
1.41 
17.0 
Alsine jamesiana (Torr.) Heller 
Oak brush . _ 
Northern aspect__ 
7,400 
July 26 
1.21 
14.6 
Spruce-fir...______ 
Southern aspect. 
10 ; 000 
July 12 
1.20 
14.4 
Aquilegia caerulea James 
Aspen-fir... 
Gentle northern aspect_ 
8,700 
July 26 
1.13 
13.6 
Spruce-fir___ 
Northern aspect. 
10,000 
July 18 
1.00 
12.0 
Do.. 
Southern aspect.. 
10,000 
July 12 
1.61 
19.4 
Arnica cor difolia Hook. 
Spruce-fir____ 
Northern aspect. 
10,000 
July 15 
0.76 
9.2 
Artemisia discolor Dougl. 
Spruce-fir_ 
Southern aspect_ 
10,200 
July 12 
0.92 
11.1 
Astragalus decumbens (Nutt.) A. Gray 
Spruce-fir_ 
Southern aspect___ 
10,000 
July 14 
1.12 
13.5 
Bromus marginatus Nees. 
Spruce-fir. 
Southern aspect. 
16,000 
July 12 
1.27 
15.8 
Caltha rotundifolia (Hutb) Greene 
Spruce-fir____ 
Southern aspect.. 
10,000 
July 12 
1.14 
18.7 
Cardamine cor difolia A. Gray 
Spruce-fir__ _ 
Northern aspect. 
10,000 
July 15 
0.67 
8.1 
CastiUeja flava S. Wats. 
Spruce-fir.... 
Southern aspect... 
10,000 
July 14 
1.56 
18.8 
Castilleja rhezifolia Rydb. 
Spruce-fir.S. 
Northern aspect. . 
10,000 
July, 18 
1.34 
" 16.1 
