Fig. 305. Eq'iistf'/jn arrense. a coninioii licrsetail: J. three fertile shoots rising from 

 the dorsivL'Dlra] stem, showing the cycles of coalesced scale-leaves at the joints 

 and the terminal strobili with numerous sporophyils, that at a being mature; 5, 

 a sterile shoot from the same stem, showing branching: j. a single peltate sporo- 

 phyll bearing sporangia; U, view of sporophyll from beneath, showing dehiscence 

 of sporangia; 5, 6, 7, spores, showing the unwinding of the outer coat, which aids 

 in dispersal.— After Wossidlo, 



