May 3i, 1924 Cell Sap Density and Environmental Conditions 
869 
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 
Situation 
Alti¬ 
tude 
Date of 
collec¬ 
tion 
Depres¬ 
sion of 
freezing 
point 
Os¬ 
motic 
pres¬ 
sure 
Dasiphora fruticosa 
(L.) Rydb. 
Beaver Creek. . 
Lodgepole pine. .. 
Very gentle southern 
aspect. 
Feet 
7,400 
1920-1921 
Sept. 16 
Degrees 
C. 
1.70 
Atmos¬ 
pheres 
20.4 
Orossularia inermis 
(Rydb.) Covilleand 
Britton 
Big Cottonwood Can- 
Aspen-fir... . . 
Norf.hp.rn aspect. . 
7,450 
July 19 
1.21 
14.6 
yon. 
Juniperus communis L. 
Beaver Creek_ 
Aspen-fir. 
Very gentle northern 
aspect. 
Very gentle eastern 
aspect. 
Northern aspect. . 
7,300 
7,400 
10,000 
Sept. 16 
do. 
1.67 
20.1 
Do.. 
Lodgepole pine 
1.26 
15.2 
Big Cottonwood Can¬ 
yon. 
Spruce-fir . . . 
Sept. 9 
0.68 
8.2 
Lepargyrea argentea 
(Nutt) Greene 
Big Cottonwood Can¬ 
yon. 
Aspen-fir... . 
Northern aspect.. 
7,450 
Sept. 12 
1.40 
16.8 
Lepargyrea canadensis 
(L.) Greene 
Big Cottonwood Can¬ 
yon- 
Lonicera involucrata 
(Richards.) Banks 
Aspen-fir . . 
Northern aspect . 
7,450 
July 12 
1.17 
14.1 
Big Cottonwood Can¬ 
yon. 
Do .________ 
Aspen-fir .. 
Northern aspect . 
7,450 
7,500 
7,450 
8,800 
8,950 
July 11 
July 13 
Sept. 12 
July 25 
1.74 
20.9 
_ do .. 
_ do . 
1.99 
2S.9 
Do __ 
_ do ... 
. do __ _ 
1.49 
17.9 
Do. . . 
Spruce-fir. . 
_do_ 
1.49 
17.9 
Do . . . 
-.:_.do. 
_do ... 
Sept. 9 
1.39 
16.9 
Lonicera utahensis 
S. Wats. 
Big Cottonwood Can¬ 
yon. 
Do .... 
Aspen-fir .. 
Northern aspect . 
7,450 
7,450 
8,950 
July 22 
Sept. 12 
Sept. 9 
1.47 
17.7 
. do.. .. 
_ do... .. 
1.28 
15.4 
Do ___ 
Spruce-fir .. 
_ do . 
1.40 
16.8 
Opulaster malvaceus 
(Greene) Kuntze 
Big Cottonwood Can¬ 
yon. 
Do ...- 
Aspen-fir _ . 
Northern aspect _ 
7.500 
7,450 
8.500 
July 13 
Sept. 12 
...do . 
1.55 
18.6 
_ do ... 
.do . . . 
1.53 
18.4 
Do.... . . 
Spruce-fir_ 
Northern aspect_ 
1 . 62 
19.5 
Ribes lacustre (Pers.) 
Poir. 
(open). 
Big Cottonwood Can¬ 
yon. 
Aspen-fir_ 
Northern aspect_ 
7,450 
July 19 
1 . 16 
14.0 
Ribes montigenum 
McClatchie 
Big Cottonwood Can¬ 
yon. 
Spruce-fir __ 
Open ridge top _ 
10,000 
July 15 
1.44 
17.3 
Ribes viscosissimum 
Pursh. 
Big Cottonwood Can¬ 
yon. 
Aspen-fir_ 
Northern aspect _ 
7,450 
July 12 
1.40 
16.8 
