Devonian Floras

Introduction; 1. The geological age of the floras; 2. The two Devonian floras; 3. Recent advances in our knowledge of the morphology and anatomy of members of the Psilophyton flora; 4. A discussion of the nature and affinities of the Psilophyton flora; 5. Recent advances in our knowledge of the morphology of the Archaeopteris flora; 6. The Procormophyta and the origin of the Cormophyta (external morphology); 7. The origin of the stele in the earlier cormophyta; Bibliography; Index.