PRE-CARBONIFEROUS FLORAS. 



445 



,-,v^ i 





Fig. 699. — Psilophyton princeps (Dawson), a, Rhizome ; h, Stem ; c, Termination of a 

 branch ; d, Vernation ; e, Fructification — all of the natural size ; g, Areole of rhizome 

 enlarged ; h. Restoration of the plant, reduced. Devonian of Canada. 



