May 2 i, 1924 Cell Sap Density and Environmental Conditions 
881 
Table XIII .—Freezing point depressions and osmotic pressures of the sap of herbs 
on Ephraim Canyon ivatershed , central Utah, classified by species, type, situation , 
altitude, and dale of collection —Continued 
[Figures in italics represent averages of two or more determinations] 
Species and type 
Situation 
Alti¬ 
tude 
Date 
of 
collec¬ 
tion 
| De- 
! pres- 
| sion of 
j freez- 
! ing 
! point 
Os¬ 
motic 
pres¬ 
sure 
Vhamaenerion angustifolium (L.) Scop. 
Spruce-fir __ 
i 
Northern aspect.. 
Feet 
10,000 
8 , 700 
1921 
July 18 
1 
Degrees 
C. 
0.90 
Atmos¬ 
pheres 
10 . 8 
Chenopodium album L. 
Aspen-fir _ _ 
Northern aspect.. 
July 25 
1.17 
14.1 
Claytonia lanecolata Pursh 
Spvuee-fir _ _*_ 
Northern aspect (wet). 
10,000 
July 18 
0.88 
4.6 
Cogswcilia simplex (S. Wats.) Rydb. 
Spruce-fir _ 
Southern aspect.. 
10,000 
July 18 
1.31 
15.8 
Collomia linearis Nutt. 
Aspen-fir - __ 
Northern aspect.. 
8,700 
July 25 
0.92 
11.1 
Comandra pallida A. DC. 
Oak brush _ _ _ 
Northern aspect__ 
7,400 
July 26 
1.62 
19.5 
Aspen-fir _ __ _ 
Southern aspect_ 
8 , 600 
July 25 
1.49 
17.9 
Delphinium barbeyi Huth 
Spruce-nr - _ 
Northern aspect.... 
10,000 
July 18 
1.00 
12.0 
Do ... 
Southern aspect. 
10,000 
July 12 
1.27 
15.3 
Delphinium menziesii DC. 
Spruce-fir - __ _ 
Southern aspect. . 
10 , 000 
July 12 
1.65 
19.8 
Dodecatheon paudflarum (Durand) 
Greene 
Spruce-fir - -- 
Northern aspect (wet)_ 
10,000 
July 15 
0.71 
8 . 6 
Drymocallis glandulosa (Lindl.) Rydb. 
Spruce-fir _ 
Northern aspect. . 
10,000 
July 18 
1.19 
14.3 
Equisetum arvense L. 
Aspen-fir... . . . . . 
Western aspect (wet)_ 
8 , 700 
July 24 
0 . 82 
9.9 
Eriogonum sp. 
Spruce-fir . . __ _ 
Southern aspect _ 
10 , 000 
Julv 18 
0. 97 
11. 7 
Cheirinia aspera (Xutt) Rydb. 
Spruce-fir . _ _ 
Southern aspect .. 
10,000 
...do _ 
0. 76 
9.2 
Erythronium grandijloru in Pursh 
Spruce-fir . ___ 
Northern aspect. .. 
10,000 
July 22 
1.03 
12.4 
Do _____ 
Southern aspect .. 
10 , 000 
July 12 
1.09 
13.1 
Fragaria bradeuta Heller 
Spruce-fir _ 
Northern aspect .. 
10,000 
July 15 
1.20 
14.4 
Fraser a speciosa Griseb. , 
Oak brush .. _ _ _ 
Northern aspect _ 
7, 400 
Julv 19 
1.26 
15.2 
\ c pen-fir . . _ 
_do_ 
8 , 700 
July 14 
1.07 
12.9 
Galium boreale h. 
Oak brush_ 
Northern aspect_ 
7, 400 
July 19 
1 . 19 
14.3 
Geranium viscosissirnum F. & M. 
Oak brush . _ .. 
Northern aspect _ 
7,400 
Julv 19 
1.08 
13.0 
Aspen-fir . .. 
_do ... 
8 , 700 
July 14 
July 18 
0. 95 
11.4 
Spruce-fir ___ 
. do .. 
10,000 
0.86 
10.4 
