)? 



I 



w^^ 





ff€i^§-'7i 



Fig. 204. Spore-Plant of a Fern {Aspidium Filix-mas). 



A, part of rootstock and fronds, not quite one-sixth natural size; fr, young 

 fronds unrolling (not usually found at the .same season as the mature 

 fronds); B^ under side of a pinnule, showing sori s; C, section through a 

 sorus at right angles to surface of leaf, showing indusium i, and sporan- 

 gia s; Z*, a sporangium discharging spores. (5 is not far from "natural 

 size. C and D are considerably magnified.) 



281 



