EXPLANATION OF THE PLATES. 



PLATES XVI, XVII. EBONY SPLEENWORT. Asplenium platyneuron. 

 Plate XVI. i. Young plant attached to prothallus. 4. Slightly older plant. 

 2-1 1. Young leaves in different stages of development. Plate XVII. i. 

 Mature fertile plant, slightly reduced. 2. Section of highly developed mature 

 fertile leaf, slightly reduced. 3. Fertile pinna of less highly developed mature 

 leaf, X if. 



