CHAP. I.] PLANT ARCHITECTURE. 29 



The solid starch that has been formed in the leaf during 

 the day becomes dissolved during the nightj and passes 



Fig. 6. One of the Honeysuckles (Lonicera glatica), showing the 

 large irregular corolla furnished with scent and honey for attracting 

 insects. 



along the veins of the leaf into the substance of the 

 plant, where it is either used at once as a building tissue. 



