232 



PRACTICAL BOTANY. 



FIG. 152. Transverse section of the petiole of Horse-chestnut. H, H, the 

 normal ring of fibrovascular bundles ; C, C, the centrally located bundles 

 which branch into the subdivisions of the leaf. (X 35.) 



8. Cut transverse sections 

 of the petiole of Horse-radish. 

 This represents the anoma- 

 lous dicotyledonous type. 

 The wood is not arranged in 

 a circle, nor even in bundles 

 arranged in a circle, but the 

 fibrovascular bundles are scat- 

 tered about without definite 

 order. For another example 

 of the same type cut trans- 

 verse sections of the petiole 

 of Plantain. 



9. Study Fig. 153, which 

 is a transverse section of the 

 stem of Basswood. It repre- 

 sents the arboreous type of 



FIG. 153. Part of transverse 

 section of first year's growth 

 of stem of Basswood. (X 35.) 



