New features and combinations will present themselves in 
each district studied. The above outline must be modified to 
suit the particular case. 
Montane districts. 
Valley series. 
Foothill series. 
Basal series. 
4. Montane series. 
5. (Alpine series, beyond tree growth). 
ooo ante 
Formations. 
1. Ifthe area is properly mapped it wil show the principal 
formations, covering the distinct physiographic 
areas, or edaphic areas, to be examined in detail. 
2. he formations (individual formations )can be deter- 
mined by discovering the dominant species. 
a. Sometimes one dominant species will constitute 
the formations. 
b. Sometimes there will be several dominant spe- 
cies in the individual formations. 
c. Chart the area occupied by different individual 
| formations and name dominant species in 
each. 
d. If there are layers as in a forest or heath deter- 
mine the prominent ones. 
e. On slope determine zona! formations. 
f. On shores of lakes or ponds with bowl-shaped 
basin determine the succession of forms. 
Ist, Littoral zone of semiaquatics. 
1. Typha (or equivalent). 
2. Bulrushes (or equivalent). 
3. Arrow leaf (or equivalent). 
and, Floating zone. 
4. Pond lilies (or equivalent). 
ard, Submerged zone. 
5. Pondweeds (or equivalent). 
6. Bass weed (or equivalent). 
3. Note prominent physical characteristics of soil. 
4. Note exposure to sun, wind, etc. 
37 
