PLATE XIII. 



A frond of Nephrodium bermudianum, cut in two, natural size. 



Figure 1. — A tertiary segment. 

 ,, 2. — Indusium. 

 ,, 3. — Portion of a sorus. 

 ,, 4, 5. — Sporangia in different positions : all enlarged. 



Drawn from a specimen in Kew Herbarium, collected by Dr Farlow. 



