Plate XXVIII. FILICALES: VARIOUS LEAF TYPES 



1. Aphlebia leaf. 



2. Neuropteris decipiens Lesquereux. Cyclopteroid leaf. 

 3-4. Spiropteris leaves, young and rolled leaves. 



5. Neuropteris decipiens Lesquereux, Cyclopteroid leaf. 

 All from Mazon Creek, U C Coll. No. 32038-42. 



74 



