Special Morphology ana Classification. 323 
_ there is also a vegetative mode of reproduction by means of 
adventitious buds on the roots (Fig. 446 1.). The prevalent 
I. 
Fic. 446.—Adder’s-tongue, Ophioglossum vulgatunt : I. whole plant (natural size) 
Il. a part of the fertile portion of the leaf with four sporangia in the act of burst- 
ing (magnified). : 
hie. 
