A TEXT-BOOK OF BOTANY. 



PIG. 1 86. Several tubers formed by a 2-year non-flowering plant of Aconitum Napellus, 

 gathered in September. The parent tuber on the right shows a portion of the overground 

 stem and a small bud (k); to the left has been developed an offspring tuber connected by 

 the branch (a) ; K, nearly full grown bud which will produce the foliage stem of the growing 

 plant the succeeding year. The long, filiform and branching roots are in the nature of true 

 root branches. After Meyer. 



Bulbs and tubers serve not only as storage-organs and carry the life 

 of the plant over from one season to another, but may form, as in 



