COLORING MATTERS IN LEAVES 



125 



191. Red and other Coloring Matters in Leaves. Cut sections 

 of red leaves of Achyranthes, or Coleus and note the character 

 and location of red coloring matter in the leaves. The presence 

 of these substances implies that only a portion of the spectrum 

 is transmitted to the chloroplasts beneath. 







FIG. 63. I. Transverse section of a velvety leaf of Eranthemum Cooperi. The 

 epidermal cells of the upper side are furnished with elongated papillose extensions 

 for entrapping sunlight. The extremities of some cells are converted into hairs. The 

 epidermis of the lower side contains anthocyan. 



2. Diagram showing the manner in which light enters the epidermal cells of velvety 

 surfaces. 



