204 BOTANY. 
‘ferns mainly in the mode of development of the large ring- 
‘less spore-cases, and in the leaves being straight or folded 
(mot rolled) before expansion. The first stage is much 
Fig. 114. Fra. 115. 
Fia. 114.—Meonwort (Botrychium Junaria), one of the Adder-tongues. st, the 
short stem bearing the divided leaf, bs, of which b is the sterile, and / the fertile, 
art. 
Fig. 115.—A Pepperwort (Marsilia salvatrix, from Australia). k, the creeping 
stem, bearing the divided leaves, of which db, b, are the sterile, and /, f, the fer 
_tile, parts (the so-called fruits). One half the natural size, 
é 
