64 



ELEMENTS OF STRUCTURAL BOTANY. 



Fig. 94. 



cording to the particular shape thej' hap- 

 pen to assume. Thus, the Carrot (Fig. 94) 

 is conical, because from a broad top it tapers 

 gradually and regularly to a point. The 

 Radish, being somewhat thicker at the middle 

 than at either end, is sjiiiuUe-sha/ied. The 

 Turnip, and roots of similar shape, are napi. 

 form (najjiis, a turnip). 

 These fleshy tap-roots belong, as a rule, to bi- 

 ennial plants, and are designed as storehouses of food for 

 the plant'suse during its second year'sgrowth. Occasion- 

 ally fibrous roots also thicken in the same manner, as 



in the Peony, and then 

 they are said to he fascicled 

 or clustered. (Fig 95.) 



86. But you must have 

 observed that plants some- 

 times put forth roots in 

 addition to those develop- 

 ed from the end of the 

 radicle. The Y(rbena of 

 of our gardens, for ex- 



rig. 96. 



