FOREST GEOGRAPHY AND ARCHZOLOGY. 223 
two of some peculiar kind, gave one to us and the other to 
Japan, Mandchuria, or the Himalayas ; when she had only one, 
divided these between the two partners on the opposite sides 
of the table. The result, as to the trees, is seen in these four 
diagrams. As to number of species generally, it cannot be 
said that Europe and Pacific North America are at all in 
arrears. But as to trees, either the contrasted regions have 
been exceptionally favored, or these have been hardly dealt 
with. There is, as I have intimated, some reason to adopt 
the latter alternative. 
We may take it for granted that the indigenous plants of 
any country, particularly the trees, have been selected by 
climate. Whatever other influences or circumstances have 
been brought to bear upon them, or the trees have brought to 
bear on each other, no tree could hold its place as a member 
of any forest or flora which is not adapted to endure even 
the extremes of the climate of the region or station. But 
the character of the climate will not explain the remarkable 
paucity of the trees which compose the indigenous European 
forest. That is proved by experiment, sufficiently prolonged 
in certain cases to justify the inference. Probably there is no 
tree of the northern temperate zone which will not flourish in 
some part of Europe. Great Britain alone can grow double 
or treble the number of trees that the Atlantic States can. 
In all the latter we can grow hardly one tree of the Pacific 
coast. England supports all of them, and all our Atlantic 
trees also, and likewise the Japanese and north Siberian spe- 
cies, which do thrive here remarkably in some part of the 
Atlantic coast, especially the cooler temperate ones. The 
poverty of the European sylva is attributable to the absence 
of our Atlantic American types, to its having no Magnolia, 
Liriodendron, Asimina, Negundo, no Adsculus, none of that 
rich assemblage of Leguminous trees represented by Locusts, 
Honey-Locusts, Gymnocladus, and Cladrastis (even its Cer- 
cis, which is hardly European, is like the Californian one 
mainly a shrub); no Nyssa, nor Liquidambar; no Hricacece 
rising to a tree; no Bumelia, Catalpa, Sassafras, Osage 
Orange, Hickory, or Walnut; and as to Conifers, no Hem- 
