82 



PTEllIDOSPERMEAE 



[CH. 



FIG. 415. A, B, Heterangium. A, H. Grievii, a, leaf-traces. B, H. tiliaeoides. 



C, root of Lyginopteris. 

 (A, B, Kidston Coll., 529, 294; C, Williamson Coll., 1631.) 



