Contents of Volume 2
 

Eastern North America

The book covers not only the colder and cooler temperate zones of both hemispheres but also follows temperate genera into the subtropics and adjacent high-elevation tropics. The concept governing which taxa to include or exclude is discussed in the Distribution and Climate chapter (see the first page-pair below).  

The book covers not only the colder and cooler temperate zones of both hemispheres but also follows temperate genera into the subtropics and adjacent high-elevation tropics. The concept governing which taxa to include or exclude is discussed in the Distribution and Climate chapter (see the first page-pair below).