2l6 



BOTANY AXD PHARMACOGNOSY. 



INNER MORPHOLOGY OF FRUITS. 



The inner structure of fruits is quite variable and it is difficult 

 to treat of this in a general way. In the simplest fruits there are 



Fig. 1 20. Transverse (I) and longitudinal (II) sections of oat grain {Avena sativa): 

 r, 2, cells of pericarp; 3, seed-coat; 4, remains of perisperm; 5, cells containing gluten; 

 7, endosperm cells containing considerable proteins and some starch; 6, endosperm cells 

 with polygonal compound starch grains; 8, fibrovascular bundle of the pericarp. After Harz. 



three distinct layers, as in the capsule of cardamom, in which 

 there is an outer epidermis of isodiametric or polygonal cells, 



, 



