Chlorobionta

Figure 18.4 Cladogram showing the postulated relationships among the major groups of vascular land plants. Some synapomorphies that define particular nodes are: Chlorobionta (chlorophyll b), Charophyceae + Embryophyta (cell structure), Embryophyta (alternation of generations), Tracheophyta (vascular canals (tracheids) and secondary thickening) and Spermatopsida (seeds). Read more about the "deep green" project to establish a complete phylogeny of green plants at http://ucjeps.berkeley. edu/bryolab/GPphylo/.

Chlorobionta
Figure 18.5 Phylogenetic tree of the main groups of vascular land plants. The pattern of postulated relationships is based on the cladogram (Fig. 18.4), and details of known stratigraphic range and species diversity are added.
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