V 
The territory, the plants of which are treated in this book, is 
the Arctic tract of land proper, viz. the regions north of the wood- 
boundary. — However, as it is not always easy to prove whether 
or not a certain point is north of the wood-boundary, and as practical 




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Map of the Arctic regions, showing the limit of the treated area. 
considerations must be taken at the same time as to the limitation, 
we haye not minutely followed the line, which is, as a rule, stated 
on maps as the wood-boundary. The accompanying map will ap- 
proximately show the boundary which we have followed. As to some 
of the most important deviations, it may be stated, that the whole of 
