ON Till: NATURE OF STIPULES 



209 



of stipule. In the Plane (fig. 320) the relations of the 

 ocrea to the stem and the leaf-stalk have been well de- 



Fig. 321. 



Fig. 322. 



E, 

 Fig. 323. Fig. 324. 



Plank (Platanus). 



scribed by Colomb, from whose account the following 

 figures are taken. Fig. 321 represents a section of the 



