92 
IOWA ACADEMY OF SCIENCES 
DOMINANT SPECIES IN THE DOUGLAS SPRUCE ZONE. 
Species. 
Per Cent. 
Altitude. 
Location. 
Peusdotsuga douglasii 
80 
6,800 
Side hill . 
( ( i i 
50 
6,800 
Side hill. 
(1 ( ( 
74.4 
6,800 
Side hill. 
i i i 1 
39.6 
6,800 
Side hill. 
i i (1 
72 
6,800 
Side hill. 
( ( ( ( 
' 4 
7,200 
Side hill. 
• ( ( ( 
24.8 
7,200 
Side hill. 
( « 1 ( 
32.4 
7,200 
Side hill. 
< ( it 
58.1 
7,200 
Side hill. 
Pinu s murrayana ■ . . 
5 
6,800 
Side hill. 
it ( c 
30 
6,800 
Side hill. 
50 
6,800 
Side hill. 
< < <1 
28.2 
6,800 
Side hill. 
< ( it 
34 • 
6,800 
Side hill. 
<4 4 4 
18.6 
6,800 
Side hill. 
4 4 4 4 
59.4 
6,800 
Side hill. 
<4 4 4 
52 
7,200 
Side hill. 
« 4 4 4 
31 
7,200 
Side hill. 
54 
7,200 
Side hill. 
Pinus flexilis 
2.5 
6,800 
Side hill. 
0 
6,800 
Side hill. 
0 
6,800 
Side hill. 
4 4 4 4 
0 
6,800 
Side hill. 
4 4 4 4 
0 
6,800 
Side hill. 
4 4 4 4 
50 
6,800 
Side hill. 
<4 4 4 
30 
■ 6,800 
Side hill. 
4 4 4 4 
0 
6,800 
Side hill. 
4 4 4 4 
24 
7,200 
Side hill. 
31 
7,200 
Side hill. 
0 
7,200 
Side hill. 
4 4 4 4 
41.5 
7,200 
Side hill. 
4 4 4 4 
20 
7,200 
Side hill. 
28.2 
7,200 
Side hill. 
Abies subalpina 
2.5 
6,800 
Side hill. 
16.5 
6,800 
Side hill. 
4 4 4 4 
6.2 
6,800 
Side hill. 
4 4 4 4 
0 
6,800 
Side hill. 
4 4 4 1 
12 
6,800 
Side hill. 
4 4 4 4 
16 
7,200 
Side hill. 
4 « 4 4 
12.4 
7,200 
Side hill. 
C 4 4 4 
12 
7,200 
S’de hill. 
4 4 4 4 
0 
7,200 
Side hill. 
4 4 4 4 
0 
7,200 
Side hill. 
4 4 4 4 
0 
7,200 
Side hill. 
4 4 4 4 
42.3 
7,200 
Side hill. 
Picea 
14 
7,200 ' 
Side hill. 
4 4 
0 
7,200 
Side hill. 
4 4 
0 
7,200 
Side hill. 
t 4 
0 
7,200 
Side hill. 
4 4 
0 
7,200 
Side hill. 
C 4 
20 
7,200 
Side hill. 
