90 
IOWA ACADEMY OF SCIENCES. 
PERCENTAGE OF SPECIES AT 5,000 FEET ALTITUDE ON 
BOULDER CREEK. 
In the same area the percentage of species found is 
shown in the following table: 
Pinus murrayana 10.8 
Plnus pondero'sa 56.6 
Pseudotsuga douglasii 26 2 
Picea engelmannii 6.4 
Between five and six thousand feet altitude on the north 
fork of the West Bitter Boot the P. ponderosa is less 
abundant, as may be seen from the following table: 
DOMINANT SPECIES.' 
Speoies. 
Per Cent. 
Per Cent. 
Altitude. 
Location. 
Pinus ponderosa 
64 
30 
5 500 
Flat. 
Pinus murrayana 
6 
6 
5.500 
5.500 
Flat. 
A-bies subalpina 
2 
2 
Flat. 
Pseudotsufra doup Lasii 
26 
60 
5,500 
5,500 
5,500 
Flat. 
Populus tremuloides 
1 
2 ■ 
Flat. 
PopuLus ba.Paniifrra 
1 
2 
Flat. 
DOMINANT SPECIES. 
Species. 
Per Cent. 
Altitude. 
Location. 
Pinus ponderoscL 
5 
6.500 
6.500 
Side of mountain. 
Pinus murravana 
10 
Side of mountain. 
Abi^s subalpina. 
2 
6,500 
6,500 
Side of mountain. 
Pseudotsuga douglasii 
73 
Side of mountain. 
DOMINANT SPECIES. 
Species. 
Per Cent. 
Altitude. 
Loc ation. 
Pinus murrayana 
Pinus ponderosa . . 
Abies subalpina . 
8.2 
15.2 
30 
14.4 
72.2 
10 
4,200 
4,200 
4,200 
4,200 
4,200 
4,200 
In swamps. 
In swamps. 
In swamps. 
In swamps. 
In swamps. 
In swamps. 
Pseudotsuga douglasii 
Picea 
Populus balsamifera 
