204 



BOTANY. 



ferns mainly in the mode o£ development of the large ring- 

 less spore-cases, and in the leaves being straight or folded 

 (not rolled) before expansion. The first stage is much 



Fio. 114. 



Fia. 11B. 



FiQ. 114.— Moonwojt (Botiychium lunaria), one of the Adder-tongues, at, the 

 short stem bearing the divided leaf, 6s, of which b is the sterile, and / the fertile, 

 part. 



Fig. 115. — A Pepperwort (Marsilia salvatrix, from Australia), h. the creeping 

 stem, bearing the divided leaves, of which 6, 6. are the sterile, and/,/, the fei> 

 tile, parts (the so-called fruits}. One half the natural size. 



