Plate XVI. FILICALES: MARIOPTERIDAE 



1. Mariopteris muricata var. nervosa (Schlotheim) Zeiller, from 

 Mazon Creek, U C Coll. No. 32024. 



2-3. Mariopteris muricata (Schlotheim) Zeiller, from Mazon Creek, 

 U I Coll. No. P 1286 and No. P 1317. 



4. mariopteris mazoniana (Lesquereux) White, from Braidwood, 



U C Coll. No. 32025. 



5. Mariopteris muricata var. nervosa (Schlotheim) Zeiller, from 



Braidwood, U C Coll. No. 32081. 



50 



