PLATE XXXI. 



PAGE 



Figs. 1-7. Cladophlebis paeva Fontaine 250 



1. Fertile frond, Fredericksburg, Virginia. 



2, 3. Fertile pinnules from foregoing specimen showing outlines and 



position of sori. X 4. 



4. Ultimate pinnule from specimen shown on Plate XXX. X 4. 



5. Pinnule i/4 distance from apex of a lateral pinna of same. X 4. 



6. Pinnule from near the base of the same pinna. X 4. 



7a-h. Group of spores from specimen shown in Fig. 1. X 350. 



