May 31,1924 Cell Sap Density and Environmental Conditions 
871 
Table VIII .—Freezing point depressions and osmotic pressures of the sap of shrubs 
classified by species, locality, type, situation, altitude, and date of collection —Con. 
[Figures in italics represent averages of two or more determinations] 
Species and locality 
Type 
Symphoricarpos oreo- 
philus A. Gray 
Big Cottonwood Can¬ 
yon. 
Do___.. 
Aspen-fir... 
__do... 
Do. 
Spruce-fir... 
Do. 
__;_„do. 
Arctostaphylos uva- 
ursi (L.) Spreng. 
Big Cottonwood Can¬ 
yon. 
Taxus canadensis 
Marshall 
Ogden, Utah.. 
Spruce-fir. 
Situation 
Alti¬ 
tude 
Date of 
collec¬ 
tion 
Depres¬ 
sion of 
freezing 
point 
Os¬ 
motic 
pres¬ 
sure 
Northern aspect. 
Feet 
7,450 
1920-1921 
July 22 
Degrees 
C. 
1.44 
Atmos¬ 
pheres 
17.3 
.do.. 
7,700 
Sept. 9 
1.34 
16.1 
Eastern aspect (open) 
9,000 
...do. 
2.05 
24.6 
Ridge-top. 
10,000 
July 15 
1. 67 
20.1 
10,000 
Sept. 9 
0.68 
8.2 
City park «.. 
4,350 
Jan. 25 
0.85 
10.2 
a Exotic to this site, planted. 
Table IX .—Freezing point depressions and osmotic pressures of the sap of herba¬ 
ceous plants, including grasses and a moss on Big Cottonwood Canyon water¬ 
shed, 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 
collection 
Depres¬ 
sion of 
freezing 
point 
Os¬ 
motic 
pres¬ 
sure 
Achillea lanulosa Nutt. 
Aspen-fir...... 
Northern aspect__ 
Feet 
7,450 
1920 
Sept. 10 
Degrees 
C. 
0.86 
Atmos¬ 
pheres 
10.4 
Aconitum bakeri Greene 
Aspen-fir... 
Northern aspect_ 
7,450 
July 26 
0.90 
10.8 
Actaeaarguta Nutt. 
Spruce-fir...... 
Northern aspect. 
9,000 
Sept. 9 
1.04 
12.5 
Agastache urticifolia (Benth.) Kuntze 
Spruce-fir___ 
Northern aspect__ 
10,000 
July 15 
Sept. 9 
1.16 
14.0 
Do._.. 
Northern aspect (open)._. 
8,850 
1. 38 
16.6 
Amblystegium varium (Hedw.) Lindb. 
Stream bank.... 
Edge of water. 
9,000 
7,400 
July 27 
Sept. 21 
0.22 
2.7 
Do.... 
_do.... 
0.42 
5.1 
Apocynum androsaemifolium L. 
Chaparral...... 
Southern aspect_ 
6,400 
7,450 
July 21 
July 26 
1.71 
30.6 
Aspen-fir..... 
.do.. 
1.41 
17.0 
Aquilegia caerulea albiflora A. Gray 
Spruce-fir..... 
Ridge-top.. 
10,000 
July 15 
1.40 
18.8 
Artemisia gnaphaloides Nutt. 
Spruce-fir... 
Ridge-top_ 
10,000 
July 15 
Sept. 22 
Sept. 9 
1.06 
12.8 
Chaparral..... 
Southern exposure_ 
6,400 
8,900 
2.04 
24.5 
Spruce-fir... 
Northern aspect. 
0.96 
11.6 
