A. Gray—Forest Geography and Archeology. 185 
Indeed, the Pacific forest is made up of conifers, with non- 
coniferous trees as occasional undergrowth or as scattered indi- 
viduals, and conspicuous only in valleys or in the sparse tree- 
growth of plains, on which the oaks at most reproduce the 
features of the “ oak openings” here and there bordering the 
Mississippi prairie region. Perhaps the most striking contrast 
etween the west and the east, along the latitude usually trav- 
ersed, is that between the spiry evergreens which the traveler 
leaves when he quits California, and the familiar woods of 
various-hued round-headed trees which give him the feeling of 
home when he reaches the Mississippi. The Atlantic forest is 
particularly rich in these, and is not meagre in coniferous trees. 
All the glory of the Pacific forest is in its coniferous trees: its 
desperate poverty in other trees appears in the annexed diagram. 
oes 
Jere 
1 ‘ 3 4 
1. Atlantic American Forest. 3. Japan-Manchurian Forest. 
2. Pacific American Forest. 4. European Forest. 
would be the Himalay-Altaian region, geographically interme- 
di ‘ Rocks Mountain 
district is between our eastern and western. Both are here left 
out of view, partly for the same, partly for special reasons per- 
taining to each, which I must not stop to explain. These four 
puked specimens will simply and pe exhibit the general 
