878 
Journal of Agricultural Research 
Vol. XXVIII, No. 9 
Table XII .—Freezing point depressions and osmotic pressures of the sap of shrubs 
on Ephraim Canyon watershed, central Utah, classified by species, type, situa¬ 
tion, 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 
Depres¬ 
sion of 
freezing 
point 
Os¬ 
motic 
pres¬ 
sure 
Atriplex confertifolia S. Wats. 
Greasewood-shadscale__ 
Alkali flat__ 
Feet 
5,600 
6,200 
1921 
July 23 
...do. 
Degrees 
C. 
5.14 
Atmos¬ 
pheres 
61.4 
Pinon-juniper___ 
Southern aspect.. 
2.62 
31.4 
Atriplex tridentata 0. Kuntze 
Greasewood-shadscale_ _... 
Alkali flat..... 
5,600 
July 23 
5.65 
67.5 
Sarcobatus vermiculaius (Hook.) Torr. 
Greasewood-shadscale__ 
Alkali flat___ 
5,600 
July 23 
...do. 
2.52 
30.3 
Sagebrush_ 
Outwash from canyon_ 
5,800 
2.23 
26.8 
Eurotia lanata (Pursh) Moq. 
Greasewood-shadscale_ 
Alkali flat. 
5,600 
July 21 
July 26 
2.98 
85.8 
Oak brush-.... 
Southern aspect.. 
7; 400 
1.72 
20.7 
Artemisia tridentata Nutt. 
Sagebrush... 
Outwash from canyon.... 
_do..... 
5,800 
5,800 
July 21 
July 23 
July 26 
July 19 
July 21 
2.9S 
85.2 
~ Do.. 
2.92 
85.0 
Oak brush____ 
Southern aspect_ 
7; 400 
7,400 
10,700 
1.68 
20.2 
Do.... 
Sagebrush flat__ 
1.38 
16.6 
Spruce-fir_ 
Northern aspect___ 
1.21 
14.6 
Chrysothamnus nauseosus (Pall.) Britt. 
Sagebrush...... 
Outwash from canyon.... 
Steep southern aspect_ 
5,800 
6,000 
July 23 
...do. 
1.32 
15.9 
Pinon-juniper .... 
1.53 
18.4 
Oak brush'--..... 
Sagebrush flat. _ ... 
7 ,400 
July 26 
1.68 
20.2 
Chrysothamnus puberulus (D. C. Eaton) 
Greene 
Pinon-juniper...... 
Southern aspect.. 
6,000 
July 23 
1.63 
19.6 
Chrysothamnus sp. 
Oak brush.... 
Southern aspect__ 
7,400 
July 26 
2.16 
26.0 
Chrysothamnus lanceolatus Nutt. 
Spruce-fir...... 
Northern aspect_ 
10,500 
10,500 
July 15 
July 21 
1.37 
16.5 
Do. 
.do.1.... 
1.87 
16.5 
Ephedra viridis Coville 
Pinon-juniper- ... 
Southern aspect. 
6,000 
July 23 
1.23 
14.8 
Rhus trilobata Nutt. 
Pinon-juniper..... 
Southern aspect. 
6,000 
July 23 
1.94 
23.3 
Peraphyllum ramosissimum Nutt. 
Pinon-juniper_ ....... 
Southern aspect__ 
6,000 
7,400 
July 23 
July 26 
2.18 
26.2 
Oak brush.___ 
_do.. 
2.08 
25.0 
Quercus utahensis (DC.) Rydb. 
Pinon-juniper... 
Southern aspect_ 
6,000 
7,400 
7,400 
7,400 
8,600 
July 23 
July 18 
July 19 
July 26 
July 25 
1.64 
19.7 
Oak brush-______ 
Northern aspect_ 
1.67 
20.1 
Do. 
Southern aspect.. 
1.72 
20.7 
Do.. 
1.54 
18.5 
Aspen-fir.. 
.do. 
1.28 
15.4 
Arctostaphylos pungens H. B. K. 
Oak brush... 
Southern aspect_ 
7,400 
8,600 
July 19 
July 26 
1.50 
18.0 
Aspen-fir.... 
1.43 
17.2 
Cer cocarpus Montanus Raf. Nutt. 
Oak brush _ ... 
Southern aspect_ 
7,400 
8,600 
July 26 
July 25 
1.31 
15.8 
Aspen-fir. 
1.31 
15.8 
