FLOUBS. 



PLATE XVII. 



Fig. 27. Bean Flour, (x 240.) 



a, Starch grains with fissured hilum. 

 a', Cell filled with starch and aleurone grains. 

 CO, Cells of the cotyledons (sometimes pitted). 

 p, Spongy parenchyma. 

 pa, Surface view of palisade epidermis. 

 p'a', Sectional view of palisade epidermis. 



pco, Walls of the cells of the cotyledons (the black spaces are due to 

 included air). 



s, Bearer cells each enclosing a large prismatic crystal of calcium oxalate. 



