20 FERNS OF KENTUCKY. 
DESURTP TION OP iene 
Figure 1—Sporangium opening (Hooker and Bauer). 
a: Ce -Spores: 
“ 3—Young prothallus, growing from the spore (a) 
(from nature). 
«« _4-—Antheridia with antherozoids escaping (Sachs). 
«¢  5—Archegonia (Sachs). 
“ 6—Developed prothallus with young fern (from 
nature). 
The figures are all highly magnified. 
