ON THE ARCTIC ELEMENT IN SOUTH TEMPERATE FLORAS
European Species and Genera of Plants in the Southern
Hemisphere--Aggressive Power of the Scandinavian Flora--Means by which
Plants have Migrated from North to South--Newly Moved Soil as Affording
Temporary Stations to Migrating Plants--Elevation and Depression of the
Snow-line as Aiding the Migration of Plants--Changes of Climate Favourable
to Migration--The Migration from North to South has been Long going
on--Geological Changes as Aiding Migration--Proofs of Migration by way of
the Andes--Proofs of Migration by way of the Himalayas and Southern
Asia--Proofs of Migration by way of the African Highlands--Supposed
Connection of South Africa and Australia--The Endemic Genera of Plants in
New Zealand--The Absence of Southern Types from the Northern
Hemisphere--Concluding Remarks on the New Zealand and South Temperate
Floras
_Pages_ 509-530